AddSecure IRIS-4 Technical Reference Manual page 56

8.3 VdS mode operation
In VdS modes, these changes are made to the way the terminal functions:

Voltage thresholds on the inputs that determine the alarm and restore detection levels are changed to
conform to VdS2463 requirements.
 Tamper detection parameters on the inputs are changed to conform to VdS2463 requirements.

Ethernet failure detection de-bounce time is 20s (normally 30s).

The polling period over Ethernet or cellular is fixed at 8s, despite the rate requested by the ARC.

Relay A indicates an ATE fault, such as a transmission path failure, by going open circuit.

Relay B indicates a transmission failure of an input pin alarm by going open circuit.
 Relay C indicates an ATE fault, such as a transmission path failure, by going closed circuit (Intruder mode) or
open circuit (Fire mode).

In the VdS Fire mode only, Relay D indicates successful transmission of alarms on inputs 2 and 10 (which is
designated for Fire) by going open circuit.
8.4 VdS Intruder Applications
The relays are assigned as follows:
Relay A:
Relay B:
Relay C:
Relay D:
The input pins are assigned as follows:
Pins 1 to 7, 9 to 16:
Pin 8:
The intruder alarm signaling shall be connected as illustrated below:
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ATE fault (normally closed)
NAK (normally closed)
Fault indicator (normally open) – to be connected to the indication device
selected for this installation.
User defined
User definable
Tamper switch
IRIS-4 Technical Reference Manual 20/03/2025