Relay Status Connections - Wheelock POWERPATH PS-12-24-8 Installation Instructions Manual

2.4 RELAY STATUS CONNECTIONS

POWER SUPPLY BOARD
WARNING: BAT FAIL AND AC FAIL CONTACTS MUST BE USED TO REPORT A TROUBLE CONDITION TO
THE FACP IN THE EVENT THAT AC OR BATTERY POWER FAILS. FAILURE TO DO THIS WILL CAUSE THE
PS-12/24-8 TO NOT REPORT ALL TROUBLE CONDITIONS.
REPORT TROUBLE THROUGH THE IN1 AND/OR IN2 NAC CIRCUITS WHEN AC FAILS, BATTERY IS LOW OR
BATTERY IS NOT PRESENT.
BAT FAIL – When the battery (12VDC or 24VDC) is applied to the +DC- terminals, the NC C terminals on the BAT FAIL will
be shorted, and the C NO terminals will be open. If the battery is removed, is low or fails with AC power present the NC C
terminal will open and the C NO will short. The low battery condition is reported at approximately 21VDC (24VDC output
setting) or approximately 10.5VDC (12VDC output setting). Refer to Figure 4.
AC FAIL – When AC Power is applied the NC C terminals on the AC FAIL will be shorted, and the C NO terminals will be
open. If the AC Power is removed or fails with battery power present, the NC C terminals will open and the C NO will short after
1 minute or 6 hours depending on the condition of J1. (J1 in line = 1 minute. J1 removed = 6 hours.) Refer to Figure 4.
LOGIC BOARD
COMMON TROUBLE TERMINALS – The common trouble terminals are located on the right side of the Logic Board. The
bottom three terminals are labeled " NC, C and NO". When the PS-12/24-8 is operating normally the NC C terminals are shorted,
and the C NO terminals are open. There are two trouble conditions that will cause these terminals to change state.
•
Supervision trouble on any output (+OUT1-, +OUT2-, +OUT3-, +OUT4-)
•
Terminals C "FAULT" NC open
NOTE: If terminals C "FAULT" NC are not used, a jumper shall be installed across the terminals.
DETAIL A
DETAIL B
P83862 M
BAT FAIL/AC FAIL
POWER SUPPLY
J1
G
DC
F
_
+
AUX
NO "REMOTE" C
AUX
RESET
CLOSED
LOGIC BOARD
OPEN
SW2 SW1
C
_ _
+ +
+
OUT1 OUT2
D
FIGURE 4 SHOWS A CIRCUIT THAT WILL
Figure 4.
OPEN = 24V SW1 CLOSED = 12V
-
+ DC + BAT
AC AC
_
DC +
OUT1 OUT3
INPUT SELECT
TEMPORAL
OUT1 OUT2 OUT3 OUT4
STROBE SYNC
IN>OUT SYNC
ON ON
OUT4
OUT2
INPUT SELECT
TEMPORAL
STROBE SYNC
IN>OUT SYNC
ON ON
ON OFF
ON OFF
INP1 INP2
_ _
+
_ _
+
OUT3 OUT4 +
IN1 IN1 IN2 C "DRY1" NC
IN2
_
_
+ +
RET2
RET1 RET1 RET2 C "DRY2" NC
E
AC
B
FAULT
UPPER
LOWER
Sheet 10 of 23