Automated Logic ZN551 Instrukcje techniczne - Strona 4

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To mount the ZN551

ZN551 Control Module • Rev. 3/17/2005

measured from its input to ground and must share the same ground as the

control module.

Screw the ZN551 into an enclosed panel using the mounting slots provided

on the cover plate. Leave about 2 in. (5 cm) on each side of the control

module for wiring.

Mounting slot

CAUTIONS

•

The ZN551 is a Class 2 device (less than 30 Vac, 100 VA). Take

appropriate isolation measures when mounting it in a control panel

where non-Class 2 devices (120 Vac or greater) are present.

•

Do not power pilot relays from the same transformer that powers the

ZN551.

NOTE You can power several control modules from the same transformer if

you maintain the same polarity.

Remove power from the 24 Vac transformer.

Pull the screw terminal connector from the control module's power

terminals labeled Gnd and 24 Vac.

Connect the transformer wires to the screw terminal connector.

Apply power to the transformer.

Measure the voltage at the ZN551's power input terminals to verify that

the voltage is within the operating range of 21.6–26.4 Vac.

Insert the screw terminal connector into the ZN551's power terminals.

Verify that the Power LED is on and the Run LED is blinking.