Application Specific Controllers Technical Manual 1628.2
UNT Controller Section
Technical Bulletin
Issue Date 1098
© 1998 Johnson Controls, Inc.
1
Code No. LIT-1628320 www.johnsoncontrols.com
Introduction Page *5
• Description 5
• Standards Compliance 7
Installation Procedures 9
• Design Considerations *9
• Tools Needed *9
• Environmental Information 10
• Mounting the Controller *10
• Power Line Wiring Transient Noise Precautions *14
• I/O and Communications Wiring Transient Noise Precautions 16
Wiring Details 17
• Power Source and Loads *17
• Wiring Precautions 19
• Grounding and Isolation UNT110/111, 120/121, 140/141 *20
• Grounding and Isolation UNT110/111, UNT120/121,
and UNT140/141 with Separate Load Transformer 21
• Terminal Designations 23
• Analog Inputs 28
• Binary Inputs 29
• Binary Outputs (Triac Jumper Information) *29
• Analog Outputs 30
Unitary (UNT) Controller
* Indicates sections where changes have occurred since the last printing.
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