Product Manuals/Man-1088_Sigma XT_26 Page 12 of 40
5. Connecting to the circuit board
All connections for field wiring are to a single row of terminals along the top of the circuit board.
Shielded fire alarm cable such as FP200 and metal cable glands must be used for all connections
to the panel. The resistance of any core of any cable must not exceed 25 ohms. The shield of the
cable must be bonded securely to the enclosure via the metal gland.
Wiring should enter the enclosure at the top or back of the panel using the knockouts provided
and be formed tidily to the appropriate terminals.
Terminals are capable of accepting wires of up to 2.5mm
2
.
Wiring must not go across the front of the circuit board. If cable entries need to be in positions
other than at the knockouts provided, wiring must be fed behind and well away from the surface of
the circuit board.
The space at the bottom of the enclosure is largely occupied by the standby batteries so this must
be borne in mind when considering cable entries.
Figure 5 Wiring to the circuit board
SW14
SW
11
SW
10
SW
12
X1
X2
VR2
DIG0
DIG1
DIG2
SW13
MAN.
R E LE A S E
EXTINGUISHANT
2ND STAGE
CON.
1ST S TAGE
CON.
FLOODING
ZON E FLT.
MANUAL
ONLY
AUTO
& MA NUAL
EXTRACT
FAN
ENTE R
SELE CT
MODE
LAMP TEST
R E S E T
ALARM/ FAULT
WARNING
S ILE N C E
AILE NCE/SOUND
ALARM
EXT.
RELE ASED
R E L.
IMMINENT
1ST S TAGE
ACT.
HOLD
ACTIVATED
1
2
3
FIRE IN ZONE
GENERAL
FAULT
POWER
FAULT
S Y S TE M
FAULT
SOUNDER FA ULT
/DISA BLEMENT
ALARM/FAULT
WARNING SILENCED
DELA Y ON
GENERAL
DISABLEMENT
TEST MODE
ON
POWER ON
MAINS
FAIL
BATT.
FAIL
CPU
FAULT
AUX 2 4V
FAULT
BATT.
LOW
COMM S
FAULT
EARTH
FAULT
SYS. F USE
FAULT
S1
FAULT
S2
FAULT
EXTING
FAULT
HOLD
FAULT
MAN. REL.
FAULT
MODE
FAULT
RELEA SE
FAULT
LOW PRES.
FAULT
TELL
TALE
EXTING
W/DOG
R E S E T
R E S E T
WRITE
E N A B LE
R E LA S E
MANUAL
PROC.
TERMINATE
ZON E FAULT/TEST
/DISABLEMENT
+
E
-
ROV
+
S I L
AL FLT RST
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
NC
C
N O
NC
C
N O
+
-
+
-
+
-
+
-
+
-
NC
C
NC
C
N O
NC
C
N O
NC
C
N O
+
-
FIRE RLY
LOCAL FIRE
FAULT RLY
EXTRA CT
LOW
PRES.
SWITCH
EXTING
PRES.
SWITCH
REL.
HOLD
MAN.
RELEASE
MODE
SELECT
2ND S TAGE
1ST STAGE
2ND
SOUNDER
ZONE3
ZONE1
ZONE2
S2
S1
1ST STAGE
SOUNDERS
POWER
DATA
STATUS UNITS
REMOTE CONTROL
AUX
24V
2ND STAGE
SNDR FAULT
FIR E
COMMON
LOW PRESS URE
CORRECT
INCORRECT
INCORRECT
