Automation Components ACI/TTU1000 User Manual
Ac i, N = i ma 22
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Table of contents
Document Outline
- RH_duct_inst.pdf
- The ACI/RH Duct and Outside series transmitters are a universal Relative Humidity transmitter that can be powered with either a +15 to 36 VDC or 24 VAC supply voltage. The ACI/RH uses a half-wave bridge rectifier to convert the AC power to a useable DC voltage. Caution: When using a 24 VAC transformer, ACI recommends that you use an isolated transformer. If sharing the transformer with your controller, valve, actuator, or any other device, be sure to connect all of the devices with the proper polarity, since most controllers are earth grounded. Failure to do so may result in damage to the ACI/RH, your controller, or any other devices that are attached due to a ground loop problem.
- The ACI/RH Duct and Outside transmitters are designed with a field selectable 4-20 mA, 0-5 VDC, or 0-10 VDC output signal that is equivalent to 0 to 100% RH. Unless specified upon ordering, all units are shipped from the factory to accept DC power with a 2-wire, 4-20 mA loop-powered output. Caution: When changing the Output Selection Switch (SW3) make sure that the power supply is turned off before making any changes. Failure to do this may cause damage to the unit.