Field Wiring Guidelines
Original instructions
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Overview
Inputs are field wired to row 2 of the base. The outputs are field wired to row 3. This section contains wiring guidelines and precautions.
Terminal Connector
To connect field devices to the I/O base, you need a field wiring terminal connector. Schneider Electric sells terminal connectors in sets of three.
Type
Part Number
Screw-in
170 XTS 001 00
Spring-clip
170 XTS 002 00
Busbar May Be Required
Depending on the type of field devices you are using, you may need a 1-row busbar. The following busbars are available from Schneider Electric.
Type
Part Number
Screw-in
170 XTS 006 01
Spring-clip
170 XTS 007 01
Mapping Terminal Blocks
CAUTION
VOLTAGE SPIKE MAY BE SUFFICIENT TO DAMAGE OR DESTROY MODULE
If an external switch is wired to control an inductive load in parallel with the module output, then an external varistor (Harris V390ZA05 or equivalent) must be wired in parallel with the switch.
Failure to follow these instructions can result in injury or equipment damage.
The following table shows mapping terminal blocks and optional busbars.
Row
Terminal
Connection
2
1
RxHi
Modbus Master RS485
2
RxLo
Modbus Master RS485
3
TxHi
Modbus Master RS485
4
TxLo
Modbus Master RS485
5
PE
Earth Ground
6
-
Not Used
7 ... 12
I1 ... I6
Inputs 1 ... 6
13 ... 16
2N
Voltage for input field devices, Neutral
17
N
Module operating voltage, Neutral
18
L1
Module operating voltage, Line
3
1 ... 4
PE
Earth Ground
5
-
Not Used
6, 8, 10
O1 ... O3
Outputs 1 ... 3
7, 9, 11 ... 16
1N
Voltage for output field devices, Neutral
17
1N
Voltage for output field devices, Neutral
18
1L1
Voltage for field devices, Line
4
18
PE
Earth Ground
NOTE: Rows 4, 5, 6 may be added by mounting a separate terminal block to the I/O base at the grounding busbar slot.
Module RS-485 Termination
The illustration below shows how to properly terminate the module’s RS-485 connector. Y-wire terminals with 120 Ohm only at each end of the network.