Relay Connection - Macurco DVP-120C User Instructions

Macurco DVP-120C Manual
3.2.3.4 Power Wire
All field wiring is completed via modular connectors (provided). After wiring, simply plug the modular connectors
into the matching connectors on the MRS-485. The power connections to the remotely mounted detectors should
be size AWG18 (minimum) for short runs. Since Macurco detectors are rated for operation between 12 and 24 VDC
or VAC, the voltage drop between the power supply and the MRS-485 should not be an issue if the recommended
power wire gauge guidelines in are followed. The terminals will accept wire from 16 to 28 AWG. To install a wire,
strip back approximately 0.25 in. (6 mm) of insulation and insert the bare wire into the terminal. Tighten the screw
clamp and ensure that the wire cannot be easily pulled from the connector.
3.2.3.5 External Power Supply
Select a UL recognized NEC Class 2 power supply which can power the MRS-485 units connected to 6-Series
detectors.
•
Each MRS-485 is rated at 3.25W with a detector connected.
• The minimum power which the power supply needs to deliver for 12 detectors is figured as:
12 detectors x 3.25 W per detector = 39W
• Therefore, a 24VDC, 60W power supply will work.

3.2.4 Relay Connection

All poles of the three relays are available at the modular connector R1 R2 R3 (see Figure 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 from 12 to 24 AWG.
To install the wiring for the relays, disconnect the connector from the header on the PCB. Strip the insulation off
each wire back approximately 0.25 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.
REV – 1.0
Wire gauge Maximum Run Length
(feet)
18 263
16 418
14 665
12 1058
Table 3-2 Wire selection for a 60W power supply
Figure 3-7 Relay Connector
[34-8708-4770-8 ]
(meters)
80
127
203
322
15 | P a g e