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Latched or Single Pulse
The relay outputs can be set by the user to be either Latched or Single Pulse.
A latched relay will maintain in its active state until the trigger source has returned to a non
alarmed state, or a second Event has been activated to disable the relay.
The relay will go active for a period of time, specified by the user, then return to a non active
state. The time out period remains independent of the length of time the active state re-
mains.
User can specify Pulse length in seconds from 0.1 (100ms) to 6480 (108 minutes) in 0.1 sec-
ond increments.
Each relay channel can be independently selected with the fail safe option. This will invert
the state of the relay output. With Failsafe Off normally open (NO) relays have open contacts
when the power is off, and open contacts when there is no active alarm. The contacts will
close when an associated alarm goes active. With Failsafe On, normally open relays have
closed contacts when the recorder is powered on and there are no open active alarms, and
the contacts open with an alarm active or when the power is removed.
Positions" on page 222.
Relay Output Specification
The SIREC D300 recorder will provide the ability to have at least 1 relay output for each an-
alogue input (i.e. 16). SIREC D400 recorder will also provide at least one relay output for
each analogue input (i.e. 48), there are three available slots for Digital inputs/ Relay Out-
puts. Up to 8 relay outputs are available for the SIREC D200 recorder.
Common Alarm Output
(Not available for the SIREC D200 recorder)
The common alarm output include a single alarm relay. This relay is the same rating as
those on the 8 & 16 Digital I/O cards. This relay is NC (normally closed) and can be activated
by any alarm. This relay will close when power is removed. This relay is identified as "Fixed"
in the relay output pick lists.
Digital Input Cards
Three options for digital inputs are available
8 Digital Inputs
8 Digital I/O card, this 8-channel card allows the user to configure each channel to be either
relay output or digital input. Relay output rated at 24V DC 1 Amp rated (resistive load).
43-TV-25-35 GLO Iss.4 Dec 06 UK
A5E01001767-04
Relay Alarm/Digital Input Specification
Latched
Single Pulse
Single Pulse Relay Settings
Fail Safe
• Rating - 24Vdc 1A Resistive Load
See "Failsafe Relay
221
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