Binder KT 53 User Manual download pdf (Page 112)

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19.5 Zero-voltage relay alarm output (option)

With this option the chamber is equipped with a zero-voltage relay alarm contact which serves to transmit

alarms to a central monitoring facility.

The connection is realized as a DIN socket (1) on the unit rear. A suitable DIN plug is enclosed.

Figure 9: Pin configuration of the DIN socket (1) on the unit rear

ALARM

Pin 1: Pole, Pin 2: Break relay, Pin 3: Make contact

In case there is no alarm, contact 1 closes with contact 3.

Closing contact 1 with contact 2 switches the zero-voltage relay alarm output.

Maximum loading capacity of the switching contacts: 24V AC/DC – 2.5A

DANGER

Electrical hazard.

Danger of death.

Damage to switching contacts and connection socket.

∅ Do NOT exceed the maximum switching load of 24V AC/DC – 2.5A.

∅ Do NOT connect any devices with a higher loading capacity.

The zero-voltage relay alarm contact is activated in case of temperature tolerance range alarm and in

case of a power failure.

Displayed icon

Error when icon is displayed

Switching the alarm contact

Power failure immediately

Temperature tolerance range alarm 10 minutes after the error occurred

A temperature alarm message will remain visible on the controller display during the whole time of the

alarm transmission via the zero-voltage relay contact.

As soon as the cause of the alarm is rectified, you can reset the alarm transmission via the zero-voltage

relay outputs together with the alarm message at the controller display by pressing the “RESET” key.

In case of a power failure, transmission of the alarm via zero-voltage relay outputs remains active for the

duration of the power failure. Afterwards, both contacts will close automatically.

When using the communication software APT-COM™ 3 DataControlSystem (option, chap.

19.1) via the Ethernet interface or the optional RS422 interface of the climatic chamber for

data acquisition, only the alarm message is recorded in the APT-COM™ protocol.

 Set the tolerance limits for limit alarms by APT-COM™ 3 separately in the APT-COM™ 3

measuring window.

You can switch on and off the alarm output for test purpose. To access this function, select

Menu > Optional equipment > Alarm output temperature (chap. 7.4).

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Binder KT 53 User Manual Page 112