Emerson Process Management Bristol ControlWave ExpressPAC - Manual (Page 50)

ControlWave ExpressPAC Instruction Manual (CI-ControlWave EPAC)
Caution
Power down the ControlWave ExpressPAC before you perform I/O
wiring. Shut down any processes the ControlWave ExpressPAC may be
managing (or switch them over manually or handle with another
controller). Perform any hardware configuration (wiring, jumper
configuration, and installation) only when the ControlWave
ExpressPAC is powered down.
Before any I/O connections can become operational, you must use
ControlWave Designer to configure and then download the application
(project).
To ensure safe use of this product, please review and follow the
instructions in the following supplemental documentation:
 Supplement Guide - ControlWave Site Considerations for
Equipment Installation, Grounding, and Wiring (S1400CW)
 ESDS Manual – Care and Handling of PC Boards and ESD
Sensitive Components (S14006)
3.3 I/O Wiring
The ControlWave ExpressPAC uses card edge terminal blocks to
accommodate field wiring. You route the wires into the
enclosure/chassis through the left side of the unit (right when facing the
front) via a ¾ inch conduit fitting.
ControlWave ExpressPAC I/O uses compression-type terminals that
accommodate up to #16 AWG wire. Insert the wire’s bared end (approx.
¼” max) into the clamp beneath the screw and secure the wire. To
prevent shorts, ensure that no bare wire is exposed. If using standard
wire, tin the bare end with solder to prevent flattening and improve
conductivity. Allow some slack in the wires when making terminal
connections. Slack makes the wires more manageable and helps
minimize mechanical strain on the terminal blocks.
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.
3-4 I/O Configuration and Wiring Revised Mar-2011