Visual Indicators (Light Emitting Diodes)
The Toxic Detector provides various LEDs for identifying operating conditions. The indicators include a four digit LED alphanumeric display, a green/red Status LED and a green power LED. These LEDs are visible through the glass cover of the
Magnetic Reset Switch
A magnetically activated switch for programming, zeroing, and resetting the Toxic Detector is provided. This switch is activated by holding the magnet (hanging from the housing) to the side of the housing where indicated by the label on the transmitter face plate. Activating the magnetic switch for less than one second will initiate a basic system reset (clear a latched particle alarm). Programming the Toxic Detector is accomplished by activating the magnetic switch for greater than one second.
Test Jacks
The Toxic Detector is equipped with test jacks to facilitate convenient current loop measurements without opening the external current loop. To make current loop measurements use the following procedure:
<Insert your current meter leads into the test jacks
<Set external devices to bypass if necessary to avoid unwanted alarm response
<Remove meter leads from test jacks
Outputs
Relays
NOTE:
The fault relay output should not be used to activate an automatic shutdown procedure. The fault output indicates a potential problem with the Toxic Detector, not an alarm condition.
All relay outputs have SPDT contacts rated 1 amperes at 30 Volts DC or 0.5 amperes at 125 Volts AC. Two relay outputs are available; one for fault and one for smog alarm. Both of the relays have normally open and normally closed contacts available at the output terminals.
The fault relay is set for normally energized operation and is
4-20 mA
A
29
