Table of Contents
Advertisement
Relays for Controlling External Equipment
The AreaRAE Plus/Pro is equipped with three solid-state relays that are switched by gas sensor
alarm conditions or by a pump failure. These relays are always active. All of the relays' contacts
are protected against high in-rush current. The external alarms that are to be connected to the
instrument must be suitable for the hazardous location where they are mounted, and supplied
from a Class 2 power supply or equivalent. The wiring method shall be to local electrical code
and installations are subject to acceptance by the authority having jurisdiction. They can be
tested by accessing Diagnostic Mode.
WARNING!
EXPLOSION HAZARD. DO NOT CONNECT OR DISCONNECT UNLESS AREA IS KNOWN TO BE
NON-HAZARDOUS.
Status: Normally Closed (default); can be changed to Normally Open by using Safety Suite Device
Configurator (SSDC) software.
Type: Dry Contact
Maximum voltage: 24VDC
Maximum amperage: 250mA
Relay contact rating: 24V, 250mA
Relays open to indicate High, Low, and Sensor or Pump Failure status. When there is a pump
failure, Relay 3's state changes to activate an alarm.
Note: If an external device is not connected, keep the dust cap on the connector to protect the
pins.
Important Information About Using Relays In Normally Open (NO) Mode
Setting the relays to Normally Open (NO) strongly impacts battery runtime, and can decrease
total runtime by as much as 30%, due to added power requirements. Also, when the relays are
set to Normally Open operation, it is extremely important to respect the maximum
voltage/amperage requirements. Failure to operate within those parameters can result in
damage to the relay(s) or void certification requirement compliance.
AreaRAE
41
User Manual
Advertisement
Table of Contents
