Document No: LT0255
F3200/NDU AS4428.1 Installation Manual
Applications
Issue 1.22
5 July 2016
Page 6-13
LOGIC & CONFIGURATION (CONTINUED)
Configure Zones
Zone
Latch MAF Anc1 Anc2 Bells
Circuit 1
-
-
- - -
Circuit 2
- -
- - -
Gas Start
Y -
- - - (see note 10)
Gas Released
- -
- - -
Gas Inhibit
N N N N N
Gas Isolated
N N N N N If required (see note 3)
Lock-off Value
N
N
N
N
N If required (see note 9)
(Zones 1-4 use all default settings. Zone 3 may be required to be non-latching. See note 10.)
Configure Relay Supervision
Relay
Enable Latch MAF LED Isolate Test
Sup.Act
1 Alert
Y
Y
Y
-
-
-
-
2 Evac
N
Y
Y
-
-
-
- (See Note 11)
3 Gas Release
Y
Y
Y - -
-
-
4 Sys Inoperative
Y
Y
Y
-
-
-
-
6.2.3
NOTES
1.
The variable V1 is used to initiate the timer rather than OC1 because outputs
(including OC) can be tested from the keypad. It is not desirable to have a "test"
function initiating the timer which releases gas.
2.
The Guard relay is used to reduce the chances of accidental Gas Release (e.g. by
someone performing a "Test " on the Gas Release Relay). (The test function may be
inhibited, as may Isolate.) It uses a normally open set of contacts and is inserted
bVBF2 and the NO terminal of the Gas Release relay (R3). It is preferable
to use an unused Brigade Relay (rated at 5A dc resistive) e.g. Isolate, if available
(not Standby), else an ancillary relay, or a module relay (each rated at 2Adc resistive)
on a separate 8RM to Gas Release. For multiple zones, a Module Relay "Guard"
relay can be common for 2 Gas zones, or Brigade Relay "Guard" relay can be
common to up to 5 Gas zones for 1A actuator loads. The common Guard relay
should be programmed to operate off the OR of the variables. For example:
ISO = V1 + V2 + V3 for a 3 Risk FIP which used ISO as the Guard relay.
If an Ancillary Module relay is used as the Guard relay, then +ARnI or +RnI should be
added to the equation for OC4.
3.
The Gas Discharge Isolate switch turns on the Gas Isolated LEDs on the gas control
doors and LCSs directly, and causes a Gas Release relay supervision fault. The third
set of contacts on the Gas Discharge Isolate switch is connected to AZC 6 (Gas
Isolated) as shown on Drawings 1931-123, 124 so that "Gas Isolated" status can
show on the LCD, be logged, and repeat from the FIP to an RZDU or remote FIP via
a network. A suitable EOLR has to be soldered across the switch contacts (yellow
and black remit wires) at time of building.
4.
Snub (suppress) inductive loads (e.g. solenoids) with a suitably rated reverse diode.
5.
The Gas Discharge Isolate switch disconnects both wires to the solenoid. When not
isolated, however, the -ve wire is connected to 0V and only the positive supply is
switched by the relay. This allows the relay supervision to check for resistance from
the relay "common" contact to 0V.
