Manual

PENDANT MOUNT APPLICATION
The 2D51 can also be used as a pendant mount detector for use in no-flow/
low-flow air-handling systems (0-4000 fpm). The pendant mounted 2D51 is to
be installed into a B210LP or B501 base and wired to a D4P120 power board
only control unit. The D4P120 power board is capable of controlling up to (2)
2D51 sensors.
INSTALLATION/WIRING
The B210LP or B501 base(s) can be wired to the D4P120 power board per the
following:
1. Install a jumper wire across the sensor #1 (Y,Y) Tamper terminals as
shown in Figure 3 of the power board.
2. Connect wires to Terminals 1 and 2 of the base. Route wires through the
conduit openings in the D4P120 power board housing. NOTE: Terminal 3
on base is unused.
3. Connect the opposing end of the wires to the terminal connections
marked “SENSOR 1” on the power board. See Figure 3 for Reference.
Ensure that wires are connected to the appropriate terminal locations. A
No. 0 or 1 phillips screwdriver should be used for terminal connection.
If a second sensor is to be installed repeat steps 1-3 while substituting SEN-
SOR 2 in all references. In addition, adjust the middle Dip switch on the pow-
erboard to indicate (2) sensors as shown in Figure 3.
3 2 1
Y Y R B
+ –
TAMPER
+ –
SENSOR 1
D4P120
FIELD INSTALLED
JUMPER WIRE
B501/B210LP
B501/B210LP
FIELD SELECTABLE
DIP SWITCHES
TEST/RESET
BUTTON
GROUND
SCREW
SENSOR #1
TERMINALS
24V AC/DC, 10
24V AC/DC, 9
AUX OUT +, 19
AUX OUT -, 20
INT/AUX-, 1
INT+, 12
ALARM, 15
R TEST, 11
R RESET, 2
ACC -
ACC +
120 VAC
B
-
R
+
YY
B
-
R
+
Y
Y
TAMPER
TAMPER
SENSOR 1SENSOR 2
OFF/ON TRBL SHUTDN
1/2 SENSORS
7/0 MIN TMPR DELAY
7, NO
18, C
AUX B
8, NC 17, NO
AUX A
6, C
16, NC
14, N0
3, C
13, NC 5, NO
SUPALARM
4, C
SENSOR #2
TERMINALS
POWER
BOARD LED 1
POWER
BOARD LED 2
120
VAC INPUT
24 VAC/
DC INPUT
3
2
1
BASE
TERMINAL 3
BASE
TERMINAL 2
BASE
TERMINAL 1
TAMPER PROOF
TAB
SS-300-017 3 I56-3140-003R
FIGURE 3: WIRING OF BASE TO D4P120
H0577-11