ControlWave Instruction Manual (CI-ControlWave)
3.2.2 Remote Termination
For I/O modules that support remote terminations, install cables
between the module’s remote headers and the remote DIN-rail mounted
terminal block assemblies (see Figure 3-4). Install field wiring between
the DIN-rail mounted terminal bock assembly and field devices (see the
wiring diagrams associated with each I/O module description).
Use AWG 14 or smaller wire (consult with the field device
manufacturer for recommendations) for remote terminations. Leave
some slack and plan for wire routing, identification, and maintenance.
Route the cables running between the I/O module and the DIN-rail
mounted terminal blocks out through the bottom of the I/O module
between the header block and the terminal housing assembly.
To provide access to the header block’s lower ¼ turn fastener use a
tie wrap to secure cables associated with connectors P3 and P4 to the
lower left side of the header block assembly. Use a second tie wrap to
secure cables for connectors P1 and P2 to the lower right side of the
header block assembly.
3.2.3 Shielding and Grounding
Use twisted-pair, shielded and insulated cable for I/O signal wiring to
minimize signal errors caused by electromagnetic interference (EMI),
radio frequency interference (RFI), and transients. When using shielded
cable, ground all shields at only one point in the appropriate system.
This prevents circulating ground current loops that can cause signal
errors.
3-6 I/O Modules Revised Nov-2010
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