25
P
OWER
I
NPUTS
AND
F
AULT
R
ELAY
C
HAPTER
8
E
LECTRICAL
W
IRING
8. Electrical Wiring
RAPTOR supports dual redundant hot swappable power supplies—Power Supply 1 (PWR1) and Power
Supply 2 (PWR2). The connections for PWR1 and PWR2 are located on the terminal block.
C
ONTEXT
:
8.1. Power Inputs and Fault Relay
The relay contact of the terminal block connector is used to detect user-configured events. The switch
provides fail open and fail close contacts to form relay circuits based on requirements. If the device is not
powered, or if an active alarm is present, the relay de-energizes, therefore initiating the NO and NC
states. The contacts are energized upon power up of the unit and remain energized unless a critical error
occurs. One common application for this output is to raise an alarm if a power failure or removal of
control power occurs.
8.2. Connecting AC Power
P
REREQUISITE
:
All equipment must be installed according to applicable local wiring codes and standards.
Always use cables that are rated for the operating ambient temperature of 85°C.
For 100-240 VAC rated equipment, protection for earth fault is provided by max. 20 A branch circuit from
AC input in building installation. The protection in the building installation is relied upon for short-circuit
backup protection.
•
The specification for AC breaker is 5 A, 2P, 277 VAC (min) Circuit breaker, Thermomagnetic or equiv
-
alent type.