AB 01 01/2009 page 10/26
2.2 Alarm output
The Alarm Box AB 01 is equipped at its rear with a zero-voltage relay alarm output via DIN socket (6) The
alarm output is switched by APT-COM™ 3 as soon as one or more supervised temperature chambers
are running with their actual value(s) out of the entered tolerance bandwidth.
2
1
3
Pin 1: Pin
Pin 2: Break
Pin 3: Make
Output of Alarm Box AB 01
Pin allocation at the DIN socket
Logic NC
If there is no alarm message, Pin 1 and 2 are closed.
The zero-voltage relay alarm output is switched with a delay.
Wiring allocation of the delivered connection cable with DIN plug:
Pin 1 of DIN-plug ---- brown wire
Pin 2 of DIN-plug ---- white wire
Pin 3 of DIN-plug ---- not used
Maximum loading capacity of the switching contact: 24V AC/DC - 2,5A
DANGER
Electrical hazard.
Danger of death.
Damage to switching contact 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.
2.3 Interface RS 422
The 25-pin SUB-D interface socket (7) of the Alarm Box AB 01 serves to receive the alarm message
released by APT-COM™ 3. The interface settings are fixed inside the unit and can not be changed.
The interface address for correct configuration of the Alarm Box on APT-COM™ 3 window
“Configure“ is fixed as No. 30.
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