Using a configured or selected output curve, the controller converts the regulation output or operating data to the corresponding
current (-25 to 25 mA) or voltage (-10 to 10 V).
More information
See Hardware characteristics and configuration, General characteristics, Analogue output characteristics and
configuration.
Using an analogue output with a switchboard instrument
The analogue output can be connected directly to a 4 to 20 mA switchboard instrument.
13.11.8 Pulse width modulation (PWM) output characteristics
The pulse width modulation (PWM) output is a regulation output for low power circuits. It may be used to regulate an electronic
engine, but not an actuator.
The PWM output (0 to 100 %) is configured as a curve, in the same way as the other analogue outputs.
More information
See Hardware characteristics and configuration, General characteristics, Analogue output characteristics and
configuration.
Duty cycles
The PWM uses duty cycles for its output. The PWM frequency determines the cycle length. One cycle is therefore 1/500 Hz = 0.002
seconds long, ±10 %. The following table illustrates the output for various duty cycles.
DESIGNER'S HANDBOOK 4189340911K UK Page 461 of 521
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