PGC, Inc 500-1000 CFM Air Handler May 2006
Appendix A A-20
If the HygroClip™ is located more than 5 meters from the air handler, it will require an amplifier on the
digital signal. The HygroPalm™ cannot calibrate “through” the amplifier. This means that the
HygroPalm™ must be connected to the DIO and common on the sensor-side of the amplifier. The DIO
amplifier is located in a plastic box near the HygroClip™. Two terminals are provided for the DIO and
common connections from the HygroPalm™.
Connect
HygroPalm™
Here
“Piggy-back”
HygroPalm™
Connection
Figure A-15 – DIO Amplifier,
HygroPalm™ Connection
Figure A-13 – ACE4 PCB,
HygroPalm™ Connection
Calibration header
HygroPalm™
Connection
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