How to wire the Remote Display Alarm Indicator
Identification of switches and controls
1.
Alarm Adjusting Switches
– These switches are used select the alarm level to be
adjusted. They are factory set at 19.5% for Alarm 1 and 18% for Alarm 2. (
Normally set
at the factory
)
2.
Alarm Polarity Switches
– These switches are used to select when the alarms will
activate. For oxygen the alarm switches are set for “Below”. If the readings go below
ambient, 20.9% then the internal horn and LED’s will activate. When used with our toxic
gas monitors, the polarity is set to “Above”. (
Normally set at the factory
)
3.
Range Auto Adjustment Switches
– These switches are used to adjust the zero and full
scale reading on the Remote Display Alarm Indicator. When sending a 4mA and 20mA
Max distance 250 feet
CAUTION:
Make all wire terminations with
the power OFF. Failure to do so can damage
the oxygen monitor and remote display and
void your warranty.
18 AWG, three conductor,
shielded
control and
instrumentation cable,
Belden 8770 or equivalent
24VDC Power Supply
Ground and
shield are
tied together
mA
When connecting
to PLC, remove
jumper and connect
MA to PLC+ and
SHIELD to PLC-.
Do not remove
jumper unless
connecting to
PLC.
