Class "B" Operation - Wheelock POWERPATH PS-12-24-8 Installation Instructions Manual

3.3 CLASS "B" OPERATION

Class "B" outputs can be controlled from either IN1 or IN2. Switches SW1 and SW2 on the Logic Board are in the "OPEN"
position.
The following are examples of Class "B" connections. A FACP is used as a representative input.
•
IN1 and/or IN2 can be used for connection to the FACP. The INPUT SELECT Switch (4) selects which input is to be used
to activate the output.
•
Logic Board switches SW1 and SW2 control Class "A" or Class "B" configuration. SW1 controls Outputs 1 and 3. SW2
controls Outputs 2 and 4.
•
The PS-12/24-8 requires a 22K OHM EOLR on each output for proper supervision. Use two 22K OHM EOLR's when two
Class "B" outputs are paralleled.
Example 1: NORMAL MODE (CLASS B)
F
A
C
P
Example 2: TEMPORAL MODE (CLASS B)
F
A
C
P
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 or
NS/NS4/NH appliances.
P83862 M
+
IN1
- ON
TO NEXT APPLIANCE
+
OR EOLR
RET1
-
POWERPATH
LOGIC BOARD
SWI "OPEN"
SW2 "OPEN"
LEGEND
STROBE
+
IN1
-
ON
TO NEXT APPLIANCE
+
OR EOLR
RET1
-
ON
POWERPATH
LOGIC BOARD
SWI "OPEN"
SW2 "OPEN"
+
OUT1-4
INPUT SELECT
OUT1
TEMPORAL
STROBE SYNC
IN>OUT SYNC
-
+
OUT2
-
+
OUT3
-
+
OUT4
-
+
OUT1
INPUT SELECT
TEMPORAL
OUT1
STROBE SYNC
IN>OUT SYNC
-
OUT2-4
INPUT SELECT
+
TEMPORAL
STROBE SYNC
IN>OUT SYNC OUT2
-
EOLR
+
OUT3
2.2K OHMS
-
EOLR
+
OUT4
2.2K OHMS
-
TO NEXT APPLIANCE
OR EOLR
(2.2K OHMS)
TO NEXT APPLIANCE
OR EOLR
(2.2K OHMS)
TO NEXT APPLIANCE
OR EOLR
(2.2K OHMS)
TO NEXT APPLIANCE
OR EOLR
(2.2K OHMS)
AUDIBLE
TO NEXT APPLIANCE
OR EOLR
(2.2K OHMS)
TO NEXT APPLIANCE
OR EOLR
(2.2K OHMS)
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