iWorx® PSU1
505-012, Effective: August 10, 2012 13
© 2012 Taco Electronic Solutions, Inc.
SPECIFICATIONS
Electrical
Inputs
• Cabling: twisted shielded pair, 18 AWG recommended—500 feet max. (152 meters)
• Resolution: 10 bit
Demand
• Dry Contact
• Normally Open
Flow
• Dry Contact
• Normally Open, Normally Closed
Supply Water Temperature, Return Water Temperature
• Precon Type II or III 10K Thermistor
Outputs
Pump Enable
• 24 Volts AC
• 1 Amp at 50 °C, 0.5 Amps at 60 °C, limited by Class 2 supply
Pump Modulation
• 0 - 10 Volts DC
• 2K Ohm minimum load
Power
Power Requirements
• 24VAC (20VAC to 28VAC), requires an external Class 2 supply
Power Consumption
• 7.2W with no external loads, maximum limited by the Class 2 supply rating
Recommended Sensor Wire
FTT-10A Network
• Speed: 78KBPS
• 42.4 Volts DC max
• Cabling: Maximum node-to-node distance: 1312 feet (400 meters)
• Maximum total distance: 1640 feet (500 meters)
For detailed specifications, refer to the FTT-10A Free-Topology Transceiver User’s Guide published by Echelon Corpo-
ration (www.echelon.com/support/documentation/manuals/transceivers).
Cable Type Pairs Details Taco Catalog No.
18AWG 1 Stranded Twisted Shielded Pair, Plenum WIR-018
Cable Type Pairs Details Taco Catalog No.
Level 4 22AWG (0.65mm) 1 Unshielded, Plenum, U.L. Type CMP WIR-022
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