Gemini C-Series GEMC-NAC Extender Installation Instructions 13
OVER-CURRENT PROTECTION
GEMC-XXXMB AND GEMC-NACXX
GEMC-NACXX NAC Over-Current protection when con-
nected to a Gemini C-Series Control Panel
When the NAC is active (turned on), it will detect a cur-
rent above 6A and turn off the output within 100mS.
The output will remain off until either:
a. The load is removed from the circuit and a short is
no longer detected;
b. The fire keypad (GEMC-FK1) is unlocked and RE-
SET pressed;
c. The fire alarm has been reset and another alarm is
detected.
If, after an over-current has been detected, the fire key-
pad (GEMC-FK1) is unlocked and
RESET
is pressed
(or a subsequent alarm turns on the output), if the circuit
detects a current above 6A the output will be turned off
within 100mS.
Note:
The system will display a NAC trouble within 200
seconds of detecting an over-current condition indicat-
ing a "
RlyTbl/ E35 NN
" followed by the programmed
description of the associated NAC. In addition, the as-
sociated NAC LED (1-4) on the GEMC-NACXX board
will flash to indicate the output is in trouble.
Use of the GEMC-24VR
The GEMC-24VR allows one of the four NAC outputs to
be a "regulated" 24V output supplying a constant volt-
age to Listed 24V Accessories as per the UL Standard
for Safety for Control Units and Accessories for Fire
Alarm Systems (UL 864).
To program, enable "
Invert Polarity
" on the selected
NAC (see the "
NAC/Output Assignment
" screen in
PCD-Windows Quickloader software). Refer to the
"
MAXIMUM AVAILABLE STANDBY CURRENT CAL-
CULATIONS
" chart earlier in this manual.
