PureAire Monitoring Systems, Inc.
52
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 Universal Gas Detector the alarm switches are set for “Below”. If the readings go into
alarm 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 signal from
Max distance 250 feet
CAUTION:
Make all wire terminations with
the power OFF. Failure to do so can damage
the Universal Gas Detector 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.
