IRIS-4 Technical Reference Manual.docx 12/01/2023
page 51
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:
ATE fault (normally closed)
Relay B:
NAK (normally closed)
Relay C:
Fault indicator (normally open) – to be connected to the indication device
selected for this installation.
Relay D:
User defined
The input pins are assigned as follows:
Pins 1 to 7, 9 to 16:
User definable
Pin 8:
Tamper switch
The intruder alarm signaling shall be connected as illustrated below: