Edwards Signaling ANSZS4B - Manual

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ANSZS2A and ANSZS4B Zone Splitter
Installation Sheet
Product description
The ANSZS2A and ANSZS4B Zone Splitter modules are
intended for use with the ANS25, ANS50, and ANS100 Audio
Notification Systems. Their purpose is to enable the output of
the ANS to be split into multiple zones for paging and alarm
selection.
The modules accept input from the ANS speaker output and
use selectable output relays to distribute the output to the
individual zones. The modules can be cascaded to increase
the number of zones.
The modules provide supervision of the individual zones for
open and short conditions. Indicator LEDs display active or
fault conditions for the individual zones. A fault condition is
reported to the FACP through the same supervisory path as
the ANS25, ANS50, or ANS100.
Zones can be selected manually by switches or through pull-
down inputs. In the event of an alarm condition, the module
defaults to All Call operation. The All Call feature can only be
overridden if the accompanying panel has zone control
features.
Each zone is limited to no more than 25 W and the total
speaker load must not to exceed the output rating of the ANS.
Speaker output can be set to 25 or 70 Vrms, selected by a
jumper position on the ANS25, ANS50, or ANS100.
Operation
In normal standby, the ANSZS2A and ANSZS4B supervise
each speaker zone wire loop. The ANSZS2A provides Style Y
supervision, and the ANSZS4B provides Style Z supervision.
When an open or short fault is detected in a zone, the yellow
LED for that zone turns on. A NC relay contact opens to
present a corresponding fault signal to the FACP providing
supervision of the ANS.
Ground faults in zone circuits are not reported by the
ANSZS2A or ANSZS4B, but are detected and reported by the
ANS25, ANS50, or ANS100.
To manually select a zone, the operator turns on the
corresponding zone switch. The red LED for the switch lights,
and output relay activation is enabled. On activation of the PTT
signal from the ANS the output relay connects the zone to the
ANS speaker output. While the zone is selected, supervision is
suspended.
Caution: Do not leave a zone switch turned on when
unattended, as this leaves the zone unsupervised.
In an alarm state, the ANSZS2A and ANSZS4B default to All
Call operation. On activation of the ANS “Alarm voltage”
output, all zones are automatically selected, and receive the
EVAC tone and message. Modules have a field-selectable
option for alarm zone activation only if the FACP has the ability
to provide separate pull-down inputs.
If a zone has a short fault, a PTC thermistor for the zone
opens, excluding the zone from output and allowing the other
zones to continue operation. Once the short is removed, the
speaker line must be disconnected for 30 seconds to reset the
PTC.
Specifications
Voltage: 24 Vdc
Current
Standby: 45 mA
Active (All Call): 130 mA
Aux. trouble relay (TB2-7, -8, and -9)
Contact rating: 1 A at 30 Vdc (resistive load)
Connections: Restricted to Class II or power-limited
sources. Interconnected equipment is unsupervised so it
must be in the same room and mounted within 20 feet of
the module.
Speaker circuit EOL: 10 kΩ