Field Wiring Guidelines
Original instructions
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Overview
The discrete input points are field wired to row 2 of the base. The discrete output points are 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-, 2-, or 3- row busbar. The following busbars are available from Schneider Electric.
Type
Number of Rows
Part Number
Screw-in
1 - row
170 XTS 006 01
2 - row
170 XTS 005 01
3 - row
170 XTS 004 01
Spring-clip
1 - row
170 XTS 007 01
2 - row
170 XTS 008 01
3 - row
170 XTS 003 01
Mapping Terminal Blocks
CAUTION
POTENTIAL FOR SHORT CIRCUITS AND/OR POWER-UP SPIKES
Provide external fuses on the operating voltage to protect the module. Appropriate fuse values are shown in the wiring illustration. An unprotected module may be subject to short circuits and/or power-up spikes.
Failure to follow these instructions can result in injury or equipment damage.
Mapping terminal blocks and busbars is described in the table below.
Row
Connection
Signal
Meaning
2
1, 3, 5, 7
U1+ ... U4+
pos. voltage input (analog)
2, 4, 6, 8
IS1 ... IS4
current sensing inputs (analog)
9, 11
QV1, QV2
analog output channels 1 ... 2 (voltage mode)
10, 12
QI1, QI2
analog outputs, channels 1 ... 2 (current mode)
13 ... 16
I1 ... I4
discrete inputs 1...4
17/ 18
M-/ L+
reference potential and operating voltage
3
1, 3, 5, 7
UI1- ... UI4-
neg. voltage mode and current mode inputs (analog)
2, 4, 6, 8
I1+ ... I4+
pos. analog inputs, channels 1 ... 4 (current mode)
9 ... 12
Ag
reference potential for analog channels
13, 14
O1, O2
discrete outputs 1,2
15, 16, 17
M-
reference potential for discrete outputs
18
1L+
output voltage mode for discrete outputs
4
1 ... 18
1L+
sensor supply
5
1 ... 18
1M-
reference potential for sensors
6
1 ... 18
PE
protective ground
Protective Circuit May Be Required
When contacted switches are used on the input lines or when lines to the peripherals are very long, the outputs of inductive loads require protective circuitry with a clamping/suppressor diode. Install the protective circuit prallel to the operating coil.