PZA
Operating Manual PZA
18219-EN-07
8
Types: DC
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U
B
: 24 V DC; Order no. 774028, 774029, 774030, 774041
*Insulation between the non-marked area and the relay contacts: Basic insulation (over-
voltage category III), Protective separation (overvoltage category II)
Function description
The unit is ready for operation when the feedback loop Y1-Y2 is closed.
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Input circuit closed (supply voltage is present)
"POWER" LED is illuminated. The safety contact 17-18 is closed and the auxiliary con-
tacts 25-26, 35-36 will open once the set delay-on energisation has elapsed. The
"OUT" LED is lit.
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The input circuit is opened (supply voltage is interrupted)
The safety contact 17-18 is redundantly opened and the auxiliary contacts 25-26, 35-36
will close. The LEDs "POWER" and "OUT" go out.
The delay time can be set in 12 stages on the front of the unit using a screwdriver.
[1]
[2]
[3]
Legend
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Input: Input circuit
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Feedback: Feedback loop
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Output safe: Safety contact
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Output aux: Auxiliary contacts
