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ICC
6.2
Wiring Connections
Note that in order to power the unit, a power supply must also be installed. Refer
to section 5.1 for more information.
1. Mount the unit via the desired method (refer to section 6.1).
2. Connect the various networks to their respective plugs/terminal blocks.
Ensure that any wires are fully seated into their respective terminal blocks,
and route the network cables such that they are located well away from any
electrical noise sources, such as adjustable-speed drive input power or
motor wiring. Also take care to route all cables away from any sharp edges
or positions where they may be pinched.
3. Take a moment to verify that the gateway and all network cables have
sufficient clearance from electrical noise sources such as drives, motors, or
power-carrying electrical wiring.
4. Connect the power supply to the gateway’s “RS-485 B” terminal block on the
terminals labeled POWER and GND. Pay particular attention to the proper
polarity.
6.3
Grounding
Grounding is of particular importance for reliable, stable operation.
Communication system characteristics may vary from system to system,
depending on the system environment and grounding method used. The
gateway has two logic ground terminals (terminal #5 on port “RS-485 A” and
terminal #6 on port “RS-485 B”) that are internally connected. These ground
terminals serve as the ground reference for both power and RS-485
communication signals.
The gateway is also provided with a “Shield” terminal adjacent to the “RS-485 B”
terminal block. This shield terminal has no internal connection: its purpose is
simply to provide a cable shield chaining location between devices. The shield is
then typically connected to ground at one location only.
Please be sure to consider the following general points for making proper ground
connections:
Grounding method checkpoints
1. Make all ground connections such that no ground current flows through the
case or heatsink of a connected electrical device.
2. Do not connect the Shield GND terminal to a power ground or any other
potential noise-producing ground connection (such as an adjustable-speed
drive’s “E” terminal).
3. Do not make connections to unstable grounds (paint-coated screw heads,
grounds that are subjected to inductive noise, etc.)
