Application

Sequence of Operation

Wiring Diagrams

Siemens Industry, Inc.

Application Note, App 6752

140-1322

2015-07-07

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)

NOTE:

Thermistor inputs are 10K (default) or 100K software selectable (AI X).