Application

Sequence of Operation
Wiring Diagram
13
Siemens Industry, Inc. Application Note, App 2940 140-1317
Restricted 2015-11-04
NOTE:
If the voltage/current switch is set to current and a 4 to 20 mA sensor is connected to
an AI, then special wiring requirements must be followed.
NOTE:
The controller’s DOs control 24 Vac loads only. The maximum rating is 12 VA for
each DO. An external interposing relay is required for any of the following:
• VA requirements higher than the maximum
• 110 or 220 Vac requirements
• DC power requirements
• Separate transformers used to power the load
(for example, part number 540-147, Terminal Equipment Controller Relay Module)