2105515-001 rev. AB | 11
Onboard connections G3 IMV G4 IMV G5 IMV
RTD connector J9 J3
1
J3
1
Digital input NA J12 J12
Digital output N/A J13 J12
Communication port 1 N/A J10 J10
2
3.7 Reinstall the I/O expansion board
To reinstall the optional I/O expansion board, if in use:
1. For G4 IMV upgrades, reinstall the I/O expansion board. Using a small slotted
screwdriver, begin turning each captive screw a few turns each, moving
sequentially to each of the 4 (four) corners of the board to slowly seat the board
into the onboard connector. Continue until the board is fully seated.
2. For G3 IMV communication board to I/O expansion board upgrades, install the
G4/G5 I/O expansion board. Move the G3 IMV communication board wires to
the corresponding pins on the G4/G5 I/O expansion board. See Table 3 for
communication wiring information and Table 4 for Digital I/O wiring information.
IMPORTANT NOTES: The G3 legacy terminal connectors are not a
direct swap to the G5. G4 connector terminals are a direct swap to the
G5 and no rewiring is required.
RS-485 bus terminations are software selectable in the G5 platform.
Please follow the instructions in the COMM 2 setup instruction section
of the startup guide included in this kit.
Table 3: Expansion board communication pinouts
G5 Pin RS-232 RS-422 RS-485
J2-1 Volts out Volts out Volts out
J2-2 Ground Ground Ground
J2-3 Sw. volts out Sw. volts out Sw. volts out
J2-4 Operate Operate Operate
J2-5 N/A RRTS RRTS
J2-6 Request to send Transmit bus + Transmit bus +
J2-7 Transmit data Transmit bus – Transmit bus –
J2-8 Receive data Receive bus + N/A
J2-9 Clear to send Receive bus - N/A
1
RTD wiring points differ from the G3 to G4/G5 µFLO and may require rewiring.
2
RS-485 communication wiring termination is set during communication setup in
PCCU32.
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