SD-2
15
7
5
14
13
12
11
10
9
1
6
4
3
2
8
WIRE GAUGE
SD-2 DETECTOR TO MAIN SOLENOID CONNECTION
MAIN
HOLD OPEN
ELECTROMAGNET
Strip approximately 1/4" of plastic insulation from the end of the two solenoid wires supplied. Connect
one end each of the electromagnet wires to terminals 6 & 9 of the SD-2 detector as shown.
SD-2
15
7
5
14
13
12
11
10
9
1
6
4
3
2
8
No. OF
ELECTRO-
MAGNET
(E4)
No. OF
ELECTRO-
MAGNET
(E3)
No. OF
ELECTRO-
MAGNET
(E2)
No. OF
ELECTRO-
MAGNET
(E1)
POWER
SUPPLY
TO NEXT HOLD
OPEN ELECTROMAGNET
WIRE LENGTH
TO E4
(D4)
WIRE LENGTH
TO E3
(D3)
WIRE LENGTH
TO E2
(D2)
WIRE LENGTH
TO E1
(D1)
WIRE GAUGE: The maximum wire gauge for wiring the SD-2 detector module is #18 AWG. The method for
determining wire gauge is given below. NOTE: A minimum of 20.4 VDC must be supplied to each solenoid
in the run.
S1, S2, S3 etc. are the number of solenoids at each subsequent station. D1 is the distance from the
power supply to the first solenoid station. D2, D3, D4 etc. are the distances from the previous solenoid
station to the next solenoid station in the run. To determine the correct wire gauge multiply E1 times D1.
Add that quantity to E2 times D2. Repeat the same procedure for each electromagnet to test the last unit in
the run. Compare the quantity calculated to the chart below. The calculated value must be less than or
equal to the value corresponding to the appropriate wire gauge.
10 GAUGE-11,788 12 GAUGE-7,407 14 GAUGE-4,669 16 GAUGE-2,997 18 GAUGE-1,843
The procedure described above can be expressed in the following equation: (E1xD1) + (E2xD2) + (E3xD3)
....(EnxDn) The above values correspond to the wire gauge to be used. If the calculated value is 1,843
#18 AWG wire can be run and connected directly to the detector module. If the calculated value exceeds
1,843 larger wiring will be required. Since the detector will only accept #18 AWG wire, a wiring splice will
be necessary as illustrated below.
#16-#12
#16-#12
#16-#12
#16-#12
#18
#18
NOTE: FOR ULC INSTALLATIONS, 18 GAUGE
WIRE IS REQUIRED TO DETECTOR
INS NO.
PAGE
Rev.
08280990
7 of 14
08/13
