Transition Networks
SISGM
–CHAS L2/L3 Switch User Guide
33625 Rev. B
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3.3.2
Fault Relay (FAIL RLY)
The relay contact of the terminal block connector is used to detect user-configured events. 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, and vice versa. The relay contact of the 2-pin terminal block
connector will respond to your configured events according to the wiring.
3.3.3
Redundant Power Inputs
The SISGM series support dual redundant power supplies, Power Supply 1 (POWER1) and Power
Supply 2 (POWER2). The connections for POWER1 and POWER2 are located on the terminal
block.
Step 1
: Remove the transparent protective cover from the terminal block.
Step 2
: Insert the negative/positive wires into the V-/V+ terminals, respectively.
Step 3
: 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.
Step 4
: After wiring is completed, put the transparent cover back to the terminal block.