APC PMG2X-A Manual download pdf (Page 16)

Installation and Operation Manual

Dry Contacts The PM2X series SPD device is provided with dry contacts. The connection

for the dry contacts is provided by 24-inch wire leads. The wire leads are

22 AWG stranded copper wire. See Table 5 for wire color and contact state.

The unpowered state shall be closed between the red wire (common) and

the yellow wire (normally closed). This is also the alarm condition. The

opposite state, closed between the red wire (common) and the blue wire

(normally open), indicates that power is on to the unit and that no alarm

condition exists (See Table 5). These dry contact leads can be used for

remote indication of the SPD operating status to a computer interface board

or emergency management system. Also, these dry contact leads are

designed to work with the SPD remote monitor option described below.

The dry contacts are designed for a maximum voltage of 24 Vdc / 24 Vac

and a maximum current of 2 A. Higher energy applications may require

additional relay implementation outside the SPD. Damage to the SPD’s

relay caused by use with energy levels in excess of those discussed in this

instruction bulletin are not covered by warranty. For application questions,

call APC Technical Support at 1-800-800-4272.

Table 5: Dry Contact Configuration

Wire Color Normal Contact State

Normal state shown is with AC power on the SPD.

Blue Closed

Red Common

Yellow Open

Operation

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APC PMG2X-A Manual Page 16