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6. Practical Application

6.1 Power Supply of PWM 8 and Encoder

6.1.1 Power Supply of PWM 8 and Encoder via DC-IN Socket

In general PWM 8 and the encoder can be powered from different sources. The table below contains an

overview of possible power supplies:

PWM 8 powered from

Power supply of encoder

24 V power

supply unit

subsequent

electronics

directly from

subs. electronics

floating

only 24V power supply unit

connected (DC-IN socket)

x x

only voltage from

subsequent electronics

connected (encoder output)

24 V power supply unit and

voltage of subsequent

electronics connected

When using a HTL interface board, potential segregation is not possible.

As already mentioned in section 2 "General Information", PWM 8 may either be powered by the

24V power supply unit (standard set) or another dc voltage source of 10 - 30 V via the DC-IN socket. The

voltage at the DC-IN socket is referenced to the encoder voltage generated by PWM 8, i.e. if potential

segregation is required between PWM 8 and subsequent electronics, the voltage at the DC-IN socket must

be floating with relation to the subsequent electronics. The 24V power supply unit supplied with PWM 8

complies with this requirement.

If the PWM 8 is operated via the DC-IN socket, it is always powered from this current source, irrespective of

whether an encoder voltage is fed at the encoder output of the interface board or not.

Socket for external power supply

(see section SPECIFICATIONS)

PWM 8 detail

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