INS_CNGE3FE7MS4_REV– Rev. 4.30.14 PAGE 16
INSTALLATION AND OPERATION MANUAL
CNGE3FE7MS4
TECH SUPPORT: 1.888.678.9427
Wiring
WARNING – Do not disconnect modules or wires unless power has been switched off
or the area is known to be non-hazardous. The devices may only be connected to the
supply voltage shown on the type plate.
1. Be sure to disconnect the power cord before installing and/or wiring your switches.
2. Calculate the maximum possible current in each power wire and common wire. Observe all electrical codes
dictating the maximum current allowable for each wire size.
3. If the current goes above the maximum ratings, the wiring could overheat, causing serious damage to your
equipment.
4. Use separate paths to route wiring for power and devices. If power wiring and device wiring paths must cross,
make sure the wires are perpendicular at the intersection point.
5. Do not run signal or communications wiring and power wiring through the same wire conduit. To avoid
interference, wires with different signal characteristics should be routed separately.
6. You can use the type of signal transmitted through a wire to determine which wires should be kept separate. The
rule of thumb is that wiring sharing similar electrical characteristics can be bundled together
7. You should separate input wiring from output wiring
8. It is advised to label the wiring to all devices in the system
Grounding
Grounding and wire routing help limit the effects of noise due to electromagnetic interference
(EMI). Run the ground connection from the ground screw on the power module to the grounding
surface prior to connecting devices.
Fault Relay
The switch provides fail open and fail close options for you to form
relay circuits based on your needs. If you want the relay device to
start operating at power failure, attach the two wires to COM and
fail close to form a close circuit, vice versa. The relay contact of
the 2-pin terminal block connector will respond to user-configured
events according to the wiring.
Redundant Power Inputs
The switch has two sets of power inputs, power input 1 and power
input 2, which sit on the front panel along with LAN ports. Follow
the steps below to wire redundant power inputs.
Step 1: Insert the negative/positive wires into the V-/V+ terminals,
respectively.
Step 2: To keep the wires from pulling loose, use a small flat-blade
screwdriver to tighten the wire-clamp screws on the front of
the terminal block connector.
FAIL
OPEN
FAIL
CLOSE
V-/N
V+/L