17
SafeGuard Controller User Manual
MAN-0115 Rev 0
•
Turning
Acknowledge
ON
(not available on Alarm 1) allows the common relay to
be deactivated during alarm conditions by an
Alarm Reset
. This is useful if an
audible device is being driven by the relay.
All relays are rated at 5 Amp for 28 VDC and 250 ~VAC
RESISTIVE
loads.
IMPORTANT: Appropriate diode (DC loads) or MOV (AC loads) snubber
devices must be installed with inductive loads to prevent RFI noise spikes. Relay
wiring should be kept separate from low level signal wiring.
2.3.2 SG10-0195
DISCRETE
RELAY “FAILSAFE” MODE
SG10-0195 Discrete relay options may also be configured to function in a
Failsafe
mode
using the System Setup menu shown in Figure 2.11. Entering YES causes these discrete
relays to have energized coils when no alarm condition exists for the associated channel
and de-energized coils when the alarm occurs.
Failsafe
is useful for indicating failed
relay coils and loss of power conditions.
Important: SG10-0195 zoning jumpers (see
Figure 3.4) should not be used when Discrete Relays menus are set for failsafe.
Zoning jumpers cause ANY relay in the zone to energize ALL other relays in the same
zone. Zoning of failsafe relays may be accomplished with wiring at the relay contact
terminals.
Figure 2.11
2.3.3
COMMON HORN RELAY & LOCAL PIEZO
The SafeGuard Controller is equipped with a low decibel audible piezo which chirps
when keys are pressed and may be configured to audibly indicate alarm conditions. The
common horn relay is similar to the common A1 & A2 common relays.
Figure 2.12
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