Hardware Outputs; Power Wiring; Communication Wiring - Siemens 125-1957 Owner's Manual

Hardware Outputs

Analog (0 to 10V)
•
Cooling valve actuator
•
Face-bypass damper actuator
•
Heating valve actuator
•
Outdoor air damper actuator
Digital
•
Auxiliary radiation electric coil contact; or,
auxiliary radiation two-position valve actuator
•
Unit fan
•
First stage electric heat
•
Second stage electric heat
•
Third stage electric heat
•
Two-position cooling valve actuator
•
Two-position heating valve actuator
•
DX coil

Power Wiring

The controller is powered by 24 Vac and connects to the two screw terminals on the
controller. Labeled "C" (Common) and "H" (Hot) on the terminal block labeled "24 VAC". No
earth-ground connection is required (Figure 2).

Communication Wiring

The controller connects to the field panel by means of a Floor Level Network (FLN) trunk.
Communication wiring connects to the three screw terminals on the controller labeled "+"
(positive), "-" (negative), and "S" (Shield) (Figure 3).
Siemens Building Technologies, Inc.
Application
2281, 2283, 2287
2281, 2283, 2284, 2286
2281, 2283, 2284, 2286, 2287
2281, 2283, 2284, 2286
Application
2281, 2283, 2284, 2286
2281, 2283, 2284, 2286, 2287
2281, 2283, 2284, 2286
2281, 2283, 2284, 2286
2281, 2283, 2284, 2286
2281, 2283, 2284, 2286
2281, 2283, 2284, 2286
2284, 2286, 2287
Introduction
3