About The Cpu's Io/Com Bus Connector - Unitronics UniStream Installation Manual

CPU-for-Panel Installation Guide

About the CPU's IO/COM Bus Connector

The IO/COM Bus connector on right side of the CPU-for-Panel provides the electrical
connection point for a Uni-I/O™ or Uni-COM™ module or Local Expansion kit. The
connector is shipped covered by a protective cover, protecting the connector from debris,
damage, and ESD.
 When no module is connected to the CPU, its IO/COM Bus Connector Cover must
remain installed.
 Turn off system power before connecting or disconnecting modules.
W iring
9 B
 This equipment is designed to operate only at SELV/PELV/Class 2/Limited Power
environments.
 All power supplies in the system must include double insulation. Power supply
outputs must be rated as SELV/PELV/Class 2/Limited Power.
 Do not connect either the 'Neutral' or 'Line' signal of the 110/220VAC to device's 0V
point.
 Do not touch live wires.
 All wiring activities should be performed while power is OFF.
 Unused points should not be connected (unless otherwise specified). Ignoring this
directive may damage the device.
 Double-check all wiring before turning on the power supply.
Caution  To avoid damaging the wire, use a maximum torque of 0.5 N·m (5 kgf·cm).
 Do not use tin, solder, or any substance on stripped wire that might cause the
wire strand to break.
 Install at maximum distance from high-voltage cables and power equipment.
W iring Procedure
1 5 B
Use crimp terminals for wiring; use 26-12 AWG wire (0.13 mm
1. Strip the wire to a length of 7±0.5mm (0.250–0.300 inches).
2. Unscrew the terminal to its widest position before inserting a wire.
3. Insert the wire completely into the terminal to ensure a proper connection.
4. Tighten enough to keep the wire from pulling free.
W iring Guidelines
1 6 B
In order to ensure that the device will operate properly and to avoid electromagnetic
interference:
 Use a metal cabinet. Make sure the cabinet and its doors are properly earthed.
 Use wires that are properly sized for the load.
For detailed information, refer to the document System Wiring Guidelines, located in
N
OTE
the Technical Library in the Unitronics' website.
6
2 2
–3.31 mm ).
Unitronics