11
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.
2.6
Horn & Strobe Connection
The external horn and strobe connections are available at the modular connector S H (see Figure 2- for details). S H as a 4-position
connector, similar to the sensor interface connectors.
Figure 2-7 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 2-3 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 2-3 Wire gauge for Horn & Strobe functions
! WARNING
Immediately exit any environment that causes an alarm condition on the sensor. Failure to do so may
result in sickness or death.
2.7
Interfacing Macurco Sensors
DVP-120
Macurco sensors with current loop outputs may be used with the DVP-120. See macurco.com for information on compatible Macurco
gas transducers.
See specific information on other manufacturer’s transducers.
Power connections to Macurco sensors used with the DVP-120 are polarity-insensitive (no polarity), since a bridge rectifier is
connected to the power input terminals. All sensors used with the DVP-120 panel employ screw clamp terminal blocks for power and
signal connections. Polarity of the current loop connections is marked on the printed circuit board of the sensor.
