SPD200K/300K
Page: 14
Dry Contacts
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
•
Use 600 Vac rated dry contact wiring.
•
Dry contact wiring must have less than 1/16 in. (1.6 mm) exposed wire from the dry contact block.
•
Do not supply more than 24 V dc / 24 V ac and no more than a current of 2 A.
Failure to follow these instructions will result in death or serious injury.
The SolaHD 200K/300K series SPD is provided with dry contacts. The connection for the dry contacts is
located on the inside of the SPD enclosure and will accept # 22 - 14 AWG stranded or solid wire. The dry
contacts are three-position, Form “C” type with Normally Open, Normally Closed, and Common connections.
In the unpowered state the contact is closed between terminals NC and COM. This is also the alarm condition.
The opposite state, closed between terminals NO and COM, indicates that power is on to the unit and that no
alarm condition exists.
Figure 7: Dry Contact Option
NO
DRY CONTACTS
NC NC C NO
C
These contacts can be used for remote indication of the SPD’s operating status to a computer interface board
or emergency management system. Also, these contacts are designed to work with the SPD remote monitor
option described in the next section.
Table 3: Dry Contact Configuration
Alarm Contact Terminals
Contact State with Power Applied
NO to COM
Closed
NC to COM
Open
The dry contacts are designed for a maximum voltage of 24 Vdc / 24 Vac and a maximum current of 2 A. For
application questions, contact us at 1-800-377-4384 or [email protected].
