Wiring and connections, Safety precautions, Front access – Alpha Technologies Cordex Controller Panel Mount_Rack Mount 125_220Vdc User Manual

Page 17: Tools required, Power inputs, Iring and, Onnections, 5wiring and connections

Argus Technologies Ltd.

018-570-C0 Rev B WC

Page 7 of 14

Wiring and Connections

This chapter provides cabling details and notes on cable sizing for DC applications with respect to the product.

NOTE: Refer also to foldout drawings located at the rear of the manual.

5.1 Safety

Precautions

WARNING
Hazardous voltages are present at both the input and the output of power systems. Ensure that
input power and output power is removed before attempting work on the CXC’s connections. Use
a voltmeter to verify the absence of voltage. Clearly mark the correct polarity of the battery leads
before commencing work on DC connections.

Refer to the previous (Installation) chapter for additional safety precautions.

5.2 Front

Access

All wiring connections are accessible from the front of the panel and rack models. For example, to gain access to
the terminal block connectors for the rack model:

1. Turn the two front panel latches (spring-loaded) counter-clockwise.
2. Tilt the front panel forward and down.
3. Loosen the CXC’s rear screws and remove its rear plate.

Terminal blocks can accommodate wire sizes per the specifications section near the front of this manual. All
cables should be routed through the access holes, bundled together with clips and clamped directly into
applicable terminal blocks.

NOTE: Connections to the CXC should comply with all local electrical codes and ordinances.

5.3 Tools

Required

Various insulated tools are essential for product installation. Use this list as a guide:

• Slot head screwdrivers (blade sizes: 1/4”, 1/8”, 1/16”)

• Philips head screwdriver, #2 (tip size 3/16”)

• Digital voltmeter equipped with test leads

• Adjustable 125/220Vdc load (optional)

• Anti-static wrist strap
• Computer (laptop) with Microsoft® Internet Explorer 6 or greater

• Crossover cable RJ-45 (for access using the Ethernet port)

• Null modem cable (for access using the RS-232 port)

• Cutters and wire strippers.

5.4

Power System Chassis Ground and DC Ground Reference

WARNING
For safety reasons, ensure the system is properly bonded to the building’s ground grid.
125/220Vdc systems are typically floating; i.e., not connected to earth ground.

Connect the CXC chassis ground to the site ground to ensure correct operation of the CXC and to prevent drifting
floating analog (especially current) readings. The Ground Fault Detect circuit will not function properly if the CXC
chassis is not connected to the site ground.

5.5 Power

Inputs

The system can operate from 125/220Vdc input with no configuration required.

NOTE: The CXC cannot function without DC power to the motherboard.

Power must be connected as follows:

1. Connect system (+) power bus lead to (+) terminals 56 (primary input) and/or 54 (secondary input).
2. Connect system (-) power bus lead to (-) terminals 57 (primary input) and/or 55 (secondary input).