Instruction manual
P84662J Page 20 of 28
3.5 CLASS “A” OPERATION WITH OPTIONAL PS-4CA MODULE
When using the PS-4CA Class “A” module switch SW7 position 1 & 2 on the board are in the “OFF”
position.
The following are examples of Class “A” connections with the PS-4CA module. A FACP is used as a
representative input.
• IN1 and/or IN2 can be used for connection to the FACP. The INPUT SELECT Switch (1) selects which input is
to be used to activate the output.
Example 15: NORMAL MODE (CLASS A using the PS-4CA module)
PS-24-8MC
1
2
3
4
ON
OUT1-4
IN>OUT SYNC
WHEELOCK SYNC
TEMPORAL
INPUT SELECT
TO NEXT APPLIANCE
OR EOLR
+
-
IN1
RET1
-
+
OUT1
+
-
A
P
C
F
1
2
3
4
ON
SW7
RET1
RET2
RET3
RET4
+
-
+
-
+
-
OUT2
+
-
OUT3
+
-
+
-
OUT4
+
-
PS-4CA
OR RETURN
TO FACP
(CLASS "A")
STROBE
AUDIBLE
LEGEND
Example 16: TEMPORAL MODE (CLASS A using the PS-4CA module)
PS-24-8MC
1
2
3
4
ON
OUT1-4
IN>OUT SYNC
WHEELOCK SYNC
TEMPORAL
INPUT SELECT
TO NEXT APPLIANCE
OR EOLR
+
-
IN1
RET1
-
+
OUT1
+
-
A
P
C
F
1
2
3
4
ON
SW7
RET1
RET2
RET3
RET4
+
-
+
-
+
-
OUT2
+
-
OUT3
+
-
+
-
OUT4
+
-
PS-4CA
1
2
3
4
ON
OUT1-4
IN>OUT SYNC
TEMPORAL
INPUT SELECT
OUT1
OUT2-4
OR RETURN
TO FACP
(CLASS "A")
CAUTION: Strobes require constant voltage and will not operate properly in the TEMPORAL MODE. A second
output set in the NORMAL MODE will provide the constant voltage.
CAUTION: Only use audible appliances that can use a coded signal. Do not use with Wheelock Series AS/AH,
NS/NH or HS4/HS appliances.