Available 4-20 Ma Configurations - Honeywell IAQPoint2 User Manual

Wiring Details

Available 4-20 mA Configurations

Available 4-20 mA Configurations
The back of the unit provides 4-20 terminals for CO2, temperature and
humidity (optional) and one jumper that allows users to set the output
range.
The 4-20 outputs are used to send a signal to a control or monitoring
unit. The strength of the signal is commensurate to the reading value:
A 4 mA signal represents the lowest value of the range.
A 20 mA signal represents the highest value of the range.
Terminal J1
Terminal J1 is reserved for power connections and for the CO
output.
Terminal J2
Terminal J2 is used to connect the optional Temperature and Humidity
4-20 outputs.
Jumper JP5
Users whose control systems operate on voltage (rather than mA), may
wish to convert readings from mA to Volts using a resistor.
Jumper JP5 lets users configure the outputs for 0-20 mA, which can
then be converted to volts readings when used with either a 250 Ohm
(for 5 V) or 500 Ohm (for 10V) resistance.
18
If the there is a fault on the 4-20, the unit will send a 2 mA
signal. Note that if the output is set to 0-20 mA, a reading of 0
mA indicates either the presence of Nitrogen or a fault.
IAQPoint User Manual
Honeywell
4-20
2
M-511703