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The contacts are designed for a Maximum voltage of 24 VDC 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
manual are not covered by warranty. For application questions, contact
your APC representative.
Care must be taken in installing the dry contact wiring because the
terminals are on a moving door. Avoid the door hinge, any disconnect
switches, and the high voltage areas of the enclosure when routing the
wiring. To avoid the door hinge, secure the dry contact wires to the
existing cable harness which crosses the hinge. Once the dry contact
wiring is secured on a non-moving point of the enclosure, it is the user’s
responsibility to maintain separation between dry contact wiring and the
power wiring in the enclosure.
Table 3: Dry Contact Configuration
Alarm Contact
Terminals
Contact State with Power Removed
NC Normally closed
COM Common
NO Normally open
DRY CONTACTS
The modular panel SPD’s come with dry contacts. The connection for
the dry contacts is located on the back of the diagnostic display panel
(lower right corner). The dry contacts are 3-position, Form "C" type with
Normally Open (NO), Normally Closed (NC) and Common (COM) connections.
The unpowered state shall be closed between terminals NO and COM.
This is also the alarm condition. The opposite state, closed between
terminals NC and COM, indicates that power is on to the unit and that
no alarm condition exists (See Table 3). These contacts can be used for
remote indication of the SPD’s operating status to a computer interface
board or emergency management system.
OPERATION
APC MODULAR PANEL PRODUCTS Surge Protective Device (SPD)
D
ANGER
H
AZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
· A
pply appropriate personal protective equipment (PPE) and follow safe electrical work practices.
See NFPA 70E.
· This equipment must only be installed and serviced by qualified electrical personnel.
· Turn off all power supplying this equipment before working on or inside equipment.
· Always use a properly rated voltage sensing device to confirm power is off.
· Replace all devices, doors and covers before turning on power to this equipment.
Failure to follow these instructions will result in death or serious injury.
De-energize power to the modular panel before installing the dry contact wires.
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