Macurco GD-6 Operation Manual page 19

Macurco GD-xx Operation Manual
3.3.2.1 Power Connection
Mains connections should be done in accordance with National and Local Electrical Codes. Only qualified personnel
should connect Mains power to any device. Macurco recommends a minimum wire size of AWG18 and the wire
insulator must be rated for 140°F (60°C) service. The modular connector will accept wire from 12 to 24 AWG.
The safety ground wire should be secured to the ground screw of the metal electrical box. Tighten the screw and
make sure the wire is snug. Ensure that the wire cannot be pulled out from under the screw.
The Line (L) and Neutral (N) wires should be stripped 1/4 in. (6.5 mm), insert the wire into the "L" and "N" wire
positions of the modular Fan/Power connector and tighten the screw clamp. Ensure that the wire cannot be easily
pulled from the connector. Plug the modular connection into the Fan/Power connection and ensure that it latches
into the header properly.
3.3.2.2 Fan Relay connection
All of the SPDT Fan relay terminals are available at the Fan/Power modular connector. Each Fan relay terminal
normally open, common and normally closed (NO, COM and NC) can accommodate a wire size 12 to 24 AWG. To
install the wiring for the relays, disconnect the connector from the header. 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. Plug the modular connection into the Fan/Power connection and
ensure that it latches into the header properly.
3.3.2.3 Alarm Relay Connection
The external alarm connections (A and B) are available at the Alarm modular connector. There is no polarity for
these connections. To install the wiring for the alarm contacts, disconnect the connector from the header on the
detector. 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. When the wires are
connected seat the modular connector into the header ensuring that the latch engages.
3.3.2.4 4-20 mA Signal connection
The positive and negative 4-20mA signal connections (+ and -) are available at the 4-20mA modular connector, a 2-
position connector. To install the wiring for the 4-20 mA contacts, disconnect the connector from the header on the
detector. 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. When the wires are
connected seat the modular connector into the header ensuring that the latch engages.
NOTE: The 4-20mA current loop outputs may be used with the Macurco DVP-120 control panel or other systems.
The 4-20mA signal connections to detectors should be size AWG18 (minimum) for short runs. Refer to the table for
recommended wire gauges. Do not bundle detector 4-20mA signal connections with AC power cables to prevent
electrical interference. If AC power connections must be bundled with the detector 4-20mA signal cables, the signal
connections should be made with twisted pair of the appropriate gauge, with an overall foil and braid shield. All
shields should be terminated at the DVP-120 end of the cable only. A ground stud is provided near the bottom left
corner of the DVP-120 panel.
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