The SP PRO Managed AC Coupling provides a method of linking the FIMER UNO Selectronic Certified (SCERT) inverters to the SP PRO via the AC Load supply so that regardless of whether the grid or a generator is connected, the SP PRO can manage and control the FIMER UNO string inverters.
Each SP PRO can manage a maximum of five FIMER UNO inverters by commanding each inverter to output the right amount of power that is needed simultaneously to supply the load, export any excess and maintain the battery bank at any particular point in time. This is done via a communications link which also serves to retrieve all the operational data for display and logging by the SP PRO.
NOTE: This document needs to be read in conjunction with the SP PRO Instruction Manual and any relevant FIMER UNO Instruction Manuals.
See Appendix II for FIMER PVI Managed AC Coupling installation instructions.
No SP PRO installed? Important information
FIMER UNO can only be configured while minimum 200Vdc is applied to the solar inputs.
The FIMER UNO-DM PLUS-B or PLUS-Q inverters can be installed with any existing FIMER Selectronic Certified inverter.
For Wireless RS485 communication, please order Wireless RS485 link kit (Order Code: 005316) for: FIMER UNO-DM PLUS-B or PLUS-Q (see Appendix I)
To extend the range of the wireless devices, please order the Patch Antenna (Order code 004810)
The following list summarises the steps taken to set up an FIMER UNO-DM in a Managed AC Coupled system. Once the system has been installed, use the following list to check off that each step has been completed.
- Install SP PROs as per manual
- Install and configure batteries
- FIMER UNO must be Selectronic Certified
- SP PRO firmware requirement - 12.20 or higher
- FIMER UNO AC Wiring
- Communications Link (RS485)
- Configure Additional Settings in SP PRO
- NOTE: The SP PRO must be configured via SP LINK "Site Configuration Wizard" before configuring FIMER UNO
- Configure the FIMER UNO Q or QU - No front screen on FIMER
- Configure the FIMER UNO - Front screen
- Test system function
The diagram below shows a managed AC coupled system with five FIMER UNOs.
To successfully install an SP PRO FIMER managed system, there are particular requirements that need to be met:
SP LINK Site Configuration Wizard must be used to verify:
Combined maximum FIMER AC output
Battery bank size
SP PRO must have firmware version 10.01 or higher.
All FIMER UNOs must be Selectronic Certified.
Maximum of five FIMER UNOs per SP PRO.
SP PRO Series 2i
NOTE:
- For a Solar Hybrid (grid connected) system, the minimum battery capacity that must be connected to the SP PRO varies depending on SP PRO model. When the system is islanded (e.g. during a grid outage) the SP PRO will limit the output of the AC coupled solar based on the actual installed battery size.
- For an Off-Grid system, the minimum battery capacity that must be connected to the SP PRO varies depending on SP PRO model, an overriding minimum battery capacity and the combined maximum FIMER UNO AC Output.
- SP PRO Software Version 12.20 or higher is required. To check software revision run SP LINK, connect to the SP PRO and go to Data View > Inverter Details > SP PRO Revision and Software Version
Data View – Inverter Details screen
- The SP PRO must be Series 2i
- Older revisions of firmware must be updated to firmware revision 12.20 or higher.
Do not change any configuration settings until firmware is updated.
The SP PRO and FIMER UNOs must be installed as per their respective installation instructions. Particular instructions directly related to Managed AC Coupling are listed below.
It is good practice to number each FIMER UNO from 1 up to 5 so that each inverter can be easily referenced within SP LINK.
In a multiphase system, label each FIMER UNO on L1, from L1-1 to L1-5. Do likewise for each of the FIMER UNOs connected to L2, from L2-1 to L2-5 and so on.
The FIMER UNO AC output wiring must be connected to the AC Load terminals of the SP PRO in accordance with local wiring rules for correct operation.
FIMER AC Wiring guide for Grid connected installation
FIMER UNO AC Wiring guide for Off Grid installation
The communication link always starts at the SP PRO and links to each of the FIMER UNOs in a daisy chain arrangement.
Using the supplied CAT5 network cable, connect one end to the Advanced Communications Card RS485-2 connection on the SP PRO. At FIMER UNO 01 (Address# 02), connect the CAT5 cable to the RS485 adapter cable, and terminate the adapter into the FIMER communications board.
NOTE: For wireless RS485 communication (Order code: 005316) please refer to Appendix I.
NOTE: To terminate the RS485 adapter cable into FIMER communications board, push down the black tabs and insert the bootlace pinned wires into the board as follows.
FIMER UNO Connections (inside unit) – RS485 Adapter Wires terminated into the FIMER communications board
| Wire Colour | FIMER Connector Label |
| Red | - T/R |
| Black | + T/R |
| White | RTN |
Set the 120Ω termination to ON if only a single unit is connected to the SP PRO. If more than one unit is connected, follow the instructions on the next page.
The following configuration outlines the connection for multiple FIMER UNOs to the first FIMER UNO.
If only a single FIMER UNO is installed, skip to the next section: (CONFIGURATION – ADDITIONAL SETTINGS)
The FIMER UNO RS485 is designed to interface with multiple FIMER UNOs in a daisy chain arrangement as shown below.
When looping an FIMER UNO to another FIMER UNO, the termination jumper must be set to “OFF” (away from ON). For the last FIMER UNO, the termination jumper must be set to “ON”.
The Site Configuration wizard (in SP LINK 9.9 or higher) must be used to configure the SP PRO settings. Using the wizard will ensure all SP PRO settings are compatible with the managed AC coupled system.
The SP PRO must be configured before any of the FIMER UNOs are energised.
The FIMER UNOs RS485 must be set sequentially from Address# 02. (See “FIMER UNO Configuration” section).
Go to the SP LINK tab Configuration Settings > System, and make sure that:
String Inverter is set to FIMER Solar.
Number of Devices is set to the number of FIMER UNOs installed in the system.
FIMER UNO Q Configuration (NO DISPLAY)
NOTE: If your FIMER UNO has a display, go to FIMER UNO Configuration (DISPLAY).
The settings listed below are required to be configured in each FIMER UNO Q in order for the system to operate correctly. Each FIMER UNO must be set to an RS485 node address from 2 to 6 as appropriate.
Isolate the AC and connect the DC supply to the FIMER UNO(s) and ensure that the DC supply (Minimum 200 VDC) is present at the FIMER UNO.
Connect the WiFi antenna to the bottom of the FIMER UNO
Follow the instructions in the FIMER quick installation guide to connect your mobile phone to the FIMER UNO inverter and follow the instructions on the screen until you reach the dashboard screen.
Select the menu, communications option then RS485.
- Once the RS485 Screen is displayed enter the details as shown above
- If only one FIMER UNO is installed then the RS485 node address must be set to 2.
- If more than one FIMER UNO is installed then the RS485 node address must be allocated sequentially starting from 2.
- Once details are entered then select the Save button to save the configuration.
NOTE: Do not skip any address numbers in the sequence.
Continue to section “System Commissioning – Additional Tests”
The settings listed below are required to be configured in each FIMER UNO in order for the system to operate correctly.
Each FIMER UNO must be set to an RS485 address from 2 to 6 as appropriate.
Isolate the AC and connect the DC supply to the FIMER UNO(s) and ensure that the DC supply (Minimum 200 VDC) is present at the FIMER UNO
When the FIMER UNO is powered for the first time, select the “Nation” of installation. For Australia and New Zealand select “AS 4777” and press the ENTER key once and to save the setting, hold the ENTER key for 5 seconds, the FIMER UNO will reset
Step through the initial stages of commissioning the inverters date and time, current input mode, Grid select, country select, etc, until the following is displayed on the screen.
NOTE: When an FIMER UNO is powered without the AC, “Missing Grid “will be displayed on screen.
- Once the display is active on the FIMER UNO, enter the main menu. To enter main menu, press the ESC button once, then using the DOWN key, scroll to System and press ENTER. The ESC is also used to escape back to the previous menu or to edit previous digits
- Scroll to Settings and press ENTER.
- To access Settings, a passcode is required. By default, 0000 is the passcode or by pressing the ENTER key four times to access the setting option. Use ENTER key to confirm an action or to access submenus
- Scroll to Set RS485 Com and press ENTER.
- Scroll to Set Port and press ENTER.
- Scroll to Address RS485 and press ENTER.
- If only one FIMER UNO is installed then the address must be set to 2/63.
- If more than one FIMER UNO is installed then the address must be allocated sequentially starting from 2/63 (i.e. first FIMER UNO = 2/63, second FIMER UNO = 3/63, third FIMER UNO = 4/63 etc).
- Once the “Inverter Number” is selected, press the ENTER button to configure and return to the “Set Port” menu.
- Scroll to Protocol and press ENTER.
- Scroll DOWN and select Aurora (slave) and press the ENTER button to configure and return to the “Set Port” menu.
- Press the ESC button five times to return to the main display.
- If there are multiple FIMER UNOs installed, repeat for all others.
- When all is configured, the FIMER UNO display screen will cycle through the amount of energy currently fed automatically.
Continue to section “System Commissioning – Additional Tests”
In addition to the normal system testing that would be performed, the following additional tests must be performed as detailed below.
NOTE: Make sure that only DC is connected at this stage.
Check that all the RS485 connections have been connected correctly.
Isolate the AC and connect the DC supply to the FIMER UNO. Make sure that the DC supply is pressent at the FIMER UNO and its display is on.
Using SP LINK, connect to the SP PRO. In the Data View > Now tab there should be a model number displayed for each of the installed inverters.
In the Service Settings tab click the Reset Counters button.
- Wait 2 minutes and check that the error count remains at zero for all the connected FIMER UNOs. (An error count of 5 or less per minute is acceptable, but in this case, it is good practice to check the wiring and that the termination resistors are set correctly in the SP PRO and FIMER UNO.
Once the system is operational, unplug the RS485 communications link from the SP PRO to the FIMER UNOs. Wait 1 minute and check that the output of each of the FIMER UNOs has dropped to approximately 0.1kW.
Appendix I: Wireless RS485 for FIMER UNO-DM Link
This instruction will show how to install the Wireless RS485 link Kit (Order code 005316).
This details the additional steps needed to install a Wireless RS485 link into a SP PRO FIMER UNO- DM Managed AC Coupled system.
Important information
This document needs to be read in conjunction with:
SP PRO AU Instruction Manual
Relevant FIMER UNO-DM Installation Manual
SD1100 RS485 Wireless adaptors are powered from the supplied plug packs. The plug packs must be connected to the same AC power circuit as the connected FIMER UNOs. This is normally the AC load side of the SP PRO.
To extend the range of the wireless devices, please order the Patch Antenna (Order code 004810).
Selectronic web site: http://www.selectronic.com.au or contact the Selectronic team.
The diagrams below illustrate the options for single phase managed AC coupled system with FIMER UNO-DM inverters.
Figure 1: Single phase system with one wireless FIMER UNO-DM
Figure 2: Single phase system with multiple wireless FIMER UNO-DM
The diagram below shows a three-phase managed AC coupled system with three FIMER UNOs per phase. A separate pair of Wireless RS485 link Kit (Order code 005316) must be used for each phase.
Figure 3: Overview of three phase system using Wireless RS485
The wireless link uses the same frequency band as Wi-Fi and Bluetooth (2.4GHz). Any obstructions between the two devices or interference from other devices using the same frequency band (other blue tooth or Wi-Fi devices) will have a significant impact on their range.
To achieve the maximum range of 200m there must be line of sight between the two devices and no interference. As a rule of thumb, each obstruction that is equivalent to a stud wall will reduce the distance by about 20%. Mud brick walls, double brick or concrete walls will have a much larger impact on the range.
Any obstruction from the landscape such as levy banks, hills or undulation land will totally block the signal and the wireless link will not work.
If more than one wireless link is required within the same installation (such as a three-phase system or multiple remote sites) then the interference between the devices will further reduce the distance. In this case it is recommended that a patch antenna be used on all local Wireless devices.
If the required distance is longer than the specified 200m clear line of site, or there are multiple devices being used then the range of the devices can be extended by replacing the dipole antenna with a “patch” antenna. The table 1 below gives an indication of the expected range when using a combination of dipole and patch antennas:
Table 1: Maximum “Line of site” distance between Wireless RS485 device pairs.
| Local Wireless device antenna | Remote wireless device antenna | Max distance, one pair of devices (line of sight) | Max. distance, multiple pair of devices (line of sight) |
| Dipole (supplied) | Dipole (supplied) | 200m | Not recommended |
| Patch – Optional (stock code 004810) | Dipole (supplied) | 300m | 150m |
| Patch – Optional (stock code 004810) | Patch – Optional (stock code 004810) | 500m | 250m |
Installation
NOTE: If you have been supplied with an “AC Coupled Interface PCA” and have an old communications card, please refer to Appendix III for instructions on how to configure RS485 communications.
The communication link starts at the SP PRO and links to the MASTER SD1100 RS485 Wireless adaptor.
Using the supplied ‘CAT5’ network cable connect one end to the SLAVE SD1100 RS485 Wireless adaptor. At FIMER UNO 01 (Address# 02), connect the CAT5 cable to the RS485 adapter cable, and terminate the adapter into the FIMER communications board.
NOTE: SD1100 RS485 Wireless adaptors are powered from the supplied plug packs. The plug packs must be connected to the same AC power circuit as the connected FIMER UNOs. This is normally the AC load side of the SP PRO.
| Wire Colour | FIMER Connector Label |
| Red | - T/R |
| Black | + T/R |
| White | RTN |
The last FIMER UNO of the daisy chain must be terminated provided jumper at the pins marked 120Ω TERM. must be placed in the ON position as shown.
NOTE: When connecting multiple FIMER UNOs together, the terminating jumper must be set to OFF 120Ω TERM for all FIMER UNO except the last inverter of the daisy chain (ON).
The RS485 devices are powered from the supplied plug packs. The plug packs must be connected to the same AC power circuit as the connected FIMER UNOs. This is normally the AC load side of the SP PRO.
Figure 5: SD1100 RS485 Wireless adaptor power connection
Appendix II: SP PRO FIMER PVI Managed AC Coupling
This section details the additional steps needed to install the managed AC Coupling system for FIMER PVI-3.0/3.6/4.2-TL-OUTD and FIMER PVI-5000/6000-TL-OUTD string inverters to the SP PRO.
NOTE: Installation note applies for SP PRO Series II Rev21 and above.
NOTE: FIMER can only be configured while minimum 200Vdc is applied to the solar inputs.
The diagram below shows a managed AC coupled system with five FIMER PVI inverters.
To successfully install an SP PRO FIMER PVI managed system, there are particular requirements that need to be met.
This installation document is applicable to SP PRO Series 2 (revision 21 or greater) inverters only with 8.0 Firmware or greater.
Combined maximum AC output of all the connected FIMER UNOs must not exceed twice the continuous rating of the SP PRO (Except for SPLC1202 which is 35kW).
Battery bank must be sized to suit the SP PRO model and the combined maximum AC Output power of the FIMER UNOs.
SP PRO must have firmware version 8.0 or greater.
All FIMER UNOs must be Selectronic Certified (Selectronic signage on front access cover).
Maximum of 5 FIMER UNOs per SP PRO
- The SP PRO units’ revision must be 21 or later (series 2).
- SP PRO Software Version 8.0 or later is required. To check software revision run SP LINK, connect to the SP PRO and go to Data View > Inverter Details > SP PRO Revision and Software Version
Packaging Label indicating Revision: 21
- Older revisions of firmware must be updated to firmware revision 8.0 or later.
Do NOT change any configuration settings until firmware is updated.
NOTE: Selectronic web site: http://www.selectronic.com.au for latest SP PRO firmware and Tech Note 34 SP PRO Firmware Update Procedure.
The FIMER UNO must be Selectronic Certified. Other FIMER UNOs will not operate correctly with the SP PRO in a managed AC coupled configuration.
The SP PRO and FIMER UNOs should be installed as per their respective installation instructions. Particular instructions directly related to Managed AC Coupling are listed below.
It is good practice to number each FIMER UNO from 1 up to 5 so that each inverter can be easily referenced within SP LINK. In a three phase AC coupled system label each FIMER UNO L1-1 to L1- 5 for the FIMERUNOs connected to SP PRO L1, L2-1 to L2-5 for those connected to L2 and so on.
NOTE: The address numbers programmed into FIMER solar inverters start from 2 and go up to 6 (instead of 1 to 5). When viewing Data in SP Link, inverter #1 is connected to FIMER UNO address 2, inverter #2 is connected to FIMER UNO address 3 etc.
The FIMER AC output wiring must be connected to the AC Load terminals of the SP PRO in accordance with local wiring rules for correct operation.
FIMER AC Wiring guide for Grid connected installation
FIMER AC Wiring guide for Off Grid installation
The communication link always starts at the SP PRO and links to the AC Coupled Interface PCA, then connects to all the FIMER UNOs in a daisy chain arrangement and finishes at the last FIMERUNO. The FIMER UNO link is used to connect subsequent FIMERUNOs ON the same phase as the SP PRO. Do not connect FIMER UNOs on different phases together.
To install the AC Coupled Interface PCA, remove the bottom two screws from the Expansion Card and replace them with the provided 2x stand offs. Then mount the AC Coupled Interface PCA to the Expansion Card inside the SP PRO close to the Serial Communication PCA as illustrated.
Connect the RJ45 Connector lead from the AC Coupled Interface PCA “To RS485 Port 2” to the SP PRO Serial Communication PCA RS485 Port 2.
Connect the second RJ45 lead from the AC Coupled Interface PCA To FIMER AC Coupled Inverter to the FIMER UNO RS485 connector (see section “RS485 Connection to first FIMER UNO”).
Connect the AC Coupled Interface PCA power loom (12V) from AC Coupled Interface PCA 12V DC Power J4 to the SP PRO Serial Communication PCA 12V connector.
NOTE: Do not connect any RJ45 leads to the AC Coupled Interface PCA To Other AC Coupled Inverters connector as the pin out is different to the FIMER UNO connection.
FIMER PVI-3.0/3.6/4.2-TL-OUTD Series RS485 Connections
FIMER PVI-3.0/3.6/4.2-TL-OUTD Series RS485 Connections (inside unit) – RJ45 connectors
When looped to another FIMER UNO, the termination switch should be set to OFF (away from ON). For the last FIMER UNO on the Communications Link (RS485) (or when only one FIMER UNO is used), the termination switch must be set to ON.
FIMER PVI-5000/6000-TL-OUTD Series
FIMER PVI-5000/6000-TL-OUTD Series RS485 Connections (inside unit) – RJ45 connectors
When looped to another FIMER, the termination switch should be set to OFF (away from ON). For the last FIMER UNO on the Communications Link (RS485) (or when only one FIMER UNO is used), the termination switch must be set to ON.
Configuration – Additional Settings
It is recommended that the Site Configuration wizard in the Easy Start Guide (in SP LINK 8.0 and above) be used to configure the SP PRO settings. Using the wizard will ensure all the SP PRO settings are compatible with the manage AC coupled system.
The settings detailed below will be set when the Site Configuration Wizard is used to configure the SP PRO. Only the additional settings required to enable FIMER Managed AC Coupling are shown. The remainder of systems settings will be set by the Site Configuration Wizard.
The SP PRO must be configured before any of the FIMER UNOs are energised. The AC coupled failsafe system in the SP PRO is only enabled when the correct FIMER configuration has been programmed into the SP PRO.
The FIMER UNOs must be appropriately addressed to ensure correct communications (see “FIMER Port Configuration” section).
- Managed AC Coupled Link, String Inverter is set to FIMER Solar.
- Number of FIMER UNOs connected is set to the number of FIMER UNOs installed in the system.
SP LINK - Configuration Settings – System tab
- Port 2 Communication settings will not be available once FIMER Communication port has been enabled.
- The FIMER UNOs numbering starts from 2 to 6 instead of 1 to 5 when creating a communication link to SP Link e.g. inverter 1 in SP Link is connected to FIMER UNO address 2, inverter 2 in SP Link is connected to FIMER UNO address 3 etc.
In the example used above, there are two FIMER UNO connected to the SP PRO.
The settings listed below are all that is required. Each FIMER UNO must be set to an inverter address from 2 to 6 as appropriate.
NOTE: The FIMER UNOs numbering starts from 2 to 6 instead of 1 to 5 when creating a communication link to SP Link e.g. inverter 1 in SP Link is connected to FIMER UNO address 2, inverter 2 in SP Link is connected to FIMER UNO address 3 etc.
Isolate the AC and connect the DC supply to the FIMER UNO(s) and ensure that the DC supply (Minimum 200Vdc) is present at the FIMER UNO.
When the FIMER UNO is powered for the first time, select the “Nation” of installation. For Australia and New Zealand select “AS 4777” and press the ENTER key once and to save the setting, hold the ENTER key for 5 seconds, the FIMER UNO will reset.
NOTE: When an FIMER UNO is powered without the AC, “Missing Grid “will be displayed on screen.
- Once the display is active on the FIMER UNO, enter parameter settings mode. To enter settings mode, press the ESC button to access the main menu, then using the DOWN key, scroll to Setting and press ENTER. The ESC is also used to escape back to the previous menu or to edit previous digits.
- Use the UP and DOWN keys to scroll through the various menu items in settings. The menu is continuous. When the end is reached, the display automatically returns to the first item. The UP/DOWN keys are used to scroll menu options or to shift numerical scales in ascending/descending order.
- To access Settings, a passcode is required. By default, 0000 is the passcode or by pressing the ENTER key four times to access the setting option. Use ENTER key to confirm an action or to access submenus.
- Scroll to Address setting and press ENTER.
- If only one FIMER UNO is installed then the address must be set to 2.
- If more than one FIMER UNO is installed then the address must be allocated sequentially starting from 2 (i.e. first FIMER = 2, second FIMER = 3, third FIMER = 4 etc).
- Once the Address is selected, press the ENTER key to configure and return to the Setting menu.
- NOTE:
- The FIMER UNO address starts from 2 to 6, where inverter 1 in SP Link is connected to FIMER UNO Address 2, i.e. FIMER UNO 1 address 2 = inverter 1 SP Link, FIMER UNO 2 address 3 = inverter 2 SP Link, FIMER UNO 3 address 4 = inverter 3 SP Link etc.
- Do Not skip any address numbers in the sequence when using multiple FIMER UNOs.
- Scroll to Remote Control setting and press ENTER.
- Set the FIMER UNO Remote Control to Enable, this will allow the FIMER UNO to disconnect through the control signal.
- Once the Remote Control is enabled, press the ENTER key to configure and return to the Settings menu.
- Scroll to the Power Reduction setting and press ENTER.
Reduction setting in the inverter.
- The FIMER UNO is set to 100% as default, use the UP key to set the Power Reduction to 0.0%.
- Once the Remote Reduction is selected, press the ENTER key to configure and return to the Settings menu.
- Press the ESC key once to return to the main menu. The FIMER UNO may perform an automatic reset to configure the changes made.
- If there are multiple FIMER UNOs installed, repeat for all others.
- When all is configured, the FIMER UNO display screen will cycle through the main menu automatically. To stop the menu from cycling, press and hold the ENTER key until a lock appears at the top right-hand corner of the display screen.
- To check that the FIMER UNO is under power control, use the DOWN key to approach the following menu screen, make sure a percentage is displayed on the display indicating that the inverter is controlled by the SP PRO.
- The Percentage Power may be displaying less than 100% even though no power limiting is required. This is because the SP PRO intelligently uses predictive algorithms to determine the optimum value based on the available solar input to the grid inverter at that time.
NOTE: If Reactive Power is required to be configured, preform the following procedure before step 6. Reactive Power must also be set in the SP PRO that is connected to the FIMER UNO.
- Scroll to Reactive Power setting and press ENTER.
- The FIMER UNO “Reactive Power” consists of four types of management to enable. Set the appropriate parameters required, press the ENTER key to configure and return to the Settings menu.
System Commissioning – Additional Tests
In addition to the normal system testing that would be performed, the following additional tests must be performed as detailed below.
The correct operation of the FIMER Managed AC Coupling relies on the Communications Link. It is vital that the communications link (RS485) connection has been setup correctly before operating the AC coupled system.
Check that all the RS485 connections have been connected correctly.
Isolate the AC and connect the DC supply to the FIMER UNO. Make sure that the DC supply is pressent at the FIMER UNO and its display is on.
Using SP LINK, connect to the SP PRO. In the Data View > Now tab there should be a model number displayed for each of the installed inverters.
The communication link may be further tested using the AC Solar Link Test found in SP LINK under the Service Settings tab.
- In the Service Settings tab click the Reset Counters button.
Wait 2 minutes and check that the error count remains at zero for all the connected FIMER UNOs. (An error count of 3 or less per minute is acceptable but in this case, it is good practice to check the wiring and that the termination resistors are set correctly in the SP PRO and FIMER UNO.
Once the Communications link has been verified for each FIMER UNO, the AC feeds to each FIMER UNO can be switched on and full system testing and verification can be performed.
Once the system is operational, unplug the RS485 communications link from the SP PRO to the FIMER UNOs. Wait 1 minute and check that the output of each of the FIMER UNOs has dropped to approximately 0.1kW.
Appendix III: Communications Link Configuration for FIMER DM PLUS with “AC Coupled Interface PCA”
To install the AC Coupled Interface PCA, remove the bottom two screws from the Expansion Card and replace them with the provided 2x standoffs. Then mount the AC Coupled Interface PCA to the Expansion Card inside the SP PRO close to the Serial Communication PCA as illustrated.
Connect the RJ45 Connector lead from the AC Coupled Interface PCA To RS485 Port 2 to the SP PRO Serial Communication PCA RS485 Port 2.
Connect the second RJ45 lead from the AC Coupled Interface PCA To FIMER AC Coupled Inverter to the FIMER UNO RS485 connector (see section “RS485 Connection to first FIMER UNO”).
Connect the AC Coupled Interface PCA power loom (12V) from AC Coupled Interface PCA 12V DC Power J4 to the SP PRO Serial Communication PCA 12V connector.
NOTE: Do not connect any RJ45 leads to the AC Coupled Interface PCA To Other AC Coupled Inverters connector as the pin out is different to the FIMER UNO connection.
Using the supplied ‘CAT5’ network cable connect one end to the AC Coupled Interface PCA “To FIMER AC Coupled Inverter” on the SP PRO. At FIMER UNO 01 (Address# 02), cut off the non- connected RJ45 connector, expose and crimp the wires using wire crimps or alternatively use a longer cable as required (not supplied) as outlined in the table below.
NOTE: For wireless RS485 communication (Order code: 005316) please refer to Appendix I.
NOTE: There are two different colour coding for RJ45 plugs, T568A and T568B, it is common that either colour code is used. To ensure correct connections please check that the RS485 RJ45 Adaptor pin # (see below table) corresponds to the FIMER UNO RS485 Connection by buzzing out the lead before connecting it to the FIMER UNO or the SP PRO.
Table 4: RS485 adaptor to FIMER UNO connections and wire colours
| RS485 RJ45 Adaptor pin # | Signal | T568A colour code | T568B colour code FIMER UNO RS485 Connection | |
| 1 | GND | Green/White | Orange/White | |
| 2 | GND | Green | Orange | |
| 3 | RS485 - B | Orange/White | Green/White | +T/R (RS485) |
| 4 | GND | Blue | Blue | |
| 5 | RS485 - A | Blue/White | Blue/White | -T/R (RS485) |
| 6 | GND | Orange | Green | |
| 7 | RS485 - RTN | Brown/White | Brown/White | RTN (RS485) |
| 8 | GND | Brown | Brown |
Connect the three wires from the CAT5 network cable to the FIMER UNO connector, +T/R, -T/R and RTN. The RS485 terminals are located on the right-hand side edge of the connector as illustrated.
Connection of AC Coupled Interface PCA To FIMER AC Coupled Inverter to FIMER UNO RS485 connector, colour code T568A is shown above.
NOTE: Only the wires connected to the RS485 are used in FIMER UNO.
120Ω TERM must be placed in the ON position as shown.
NOTE: When connecting multiple FIMER UNOs together, the terminating jumper must be set to OFF 120Ω TERM for all FIMER UNO except the last inverter of the daisy chain (ON).
The following configuration outlines the connection for multiple FIMER UNOs to the first FIMER UNO (FIMER UNO 01). If only a single FIMER UNO is installed, skip to the next section (CONFIGURATION – ADDITIONAL SETTINGS).
Inside the FIMER UNO there is an RS485 black terminal block. The FIMER UNO RS485 is designed to interface with multiple AFIMER UNOs in a daisy chain arrangement as shown below.
When looping an FIMER UNO to another FIMER UNO, the termination jumper must be set to OFF (away from ON). For the last FIMER UNO, the termination jumper must be set to “ON”.