Specifications

9
2.5 Relay Connection
All poles of the three relays are available at the modular connector R1 R2 R3 (see Figure 2-2 for details). R1 R2 R3 is a 9-position variant of the high voltage modular connector used for
power input. Each terminal can accommodate a wire size 12 to 24 AWG.
Figure 2-2 Relay Connector
To install the wiring for the relays, disconnect the connector from the header on the PCB. Strip the insulation of each wire back approximately 1/4 in. (6.5 mm), insert the bare wire into the
terminal and tighten the screw clamp. Ensure that the wire cannot easily be pulled from the connector. Refer to Table 2-5 for output signals, connector and terminal assignment for all three
relays.
Signal Name
Connector Pin Number
Relay 1 NC
R1 R2 R3 1
Relay 1 NO R1 R2 R3 2
Relay 1 Common R1 R2 R3 3
Relay 2 NC R1 R2 R3 4
Relay 2 NO R1 R2 R3 5
Relay 2 Common R1 R2 R3 6
Relay 3 NC R1 R2 R3 7
Relay 3 NO R1 R2 R3 8
Relay 3 Common R1 R2 R3 9
Table 2-5 Relay Interface Signals and Connector Assignments
2.6 Horn & Strobe Connection
The external horn and strobe connections are available at the modular connector S H (see Figure 2-3 for details). S H as a 4-position connector, similar to the sensor interface connectors.
Figure 2-3 Horn & Strobe Connector
To install the wiring for the horn or strobe, disconnect the connector from the header on the PCB. Strip the insulation of each wire back approximately 0.25 in. (6 mm), insert the bare wire
into the terminal and tighten the screw clamp. Ensure that the wire cannot easily be pulled from the connector. When all wires are connected, seat the modular connector into the PCB
header; ensure that the latch engages. Refer to Table 2-6 for signals, connector and terminal assignment for the horn and strobe.
Signal Name Connector Pin Number
Horn + S H 1
Horn - S H 2
Strobe + S H 3
Strobe - S H 4
Table 2-6 Horn & Strobe Signals and Connector Assignments
Refer to Table 2-7 for recommended wire gauge vs. run length for the horn & strobe functions (maximum 2.5 volt drop in the wire). The Strobe and Horn circuits are Class 2 control circuits
so Class 2 conductors should be used.
Wire gauge
Maximum Run Length (ft.)
(feet) (meters)
24 200 61
22 340 103
20 480 147
18 850 215
Table 2-7 Wire Gauge for Horn & Strobe Functions