VII-36
COM2
NO
FAULT
K4
K3
K2
K1
3E
3D
2E
2D
1E
1D
TROUBLE
SUPER
ALARM
COM1
COM
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
3
2
1
RXD
+
COM
TXD
+
COM
A
CHASSIS
–
–
–
–
P1
P2
RS-485
GND FLT
MAIN 24V
AUX 24V
DC1
DC2
A
B
SHIELD
RESET
INPUT 1
INPUT 2
INPUT 3
RXD
–
TXD
–
RXD
TXD
B
EARTH
+
+
+
+
NC
NO
COM
NC
GATEWAY RELAYS
ROW C
ROW B
ROW A
C1940
3
4
5
61
2
10
11
12
7
8
12
34
COM 1
COM 2
+
–
B
A
24 VDC
10
9
8
7
6
SHIELD
5
12
3
1
0
9
8
7
46
5
SHIELD
A
B
SHIELD
+
–
–
+
SHIELD
A
B
SHIELD
B
A
SHIELD
SHIELD
B
A
+
SENSOR
–
POWER
4 TO 20 MA IN
POINTWATCH CALIBRATE
COM 1
COM 2
COM 1
24 VDC
COM 2
24 VOLTS DC
TO GAS DETECTOR
POWER SUPPLY
++
––
J3
J4
AUX POWER
J5
A
B
J1
J2
+
–
–
+
RS-485
MAIN AUX
EQ2100LCU
EQ2200UV
EQ2200DCU
EQ2100LIOU
EQ2401NE
14
13
12
11
9
3
4
5
61
2
10
11
12
7
8
SHIELD
A
B
SHIELD
+
–
–
+
SHIELD
A
B
SHIELD
COM 1
24 VDC
COM 2
9
SYSTEM
POWER
SUPPLY
+
+
–
–
24 VOLT
BATTERY
BACKUP
A C LINE
H
N
J3
1
2
3
4
C
B
POWER SUPPLY MONITOR
B
A
TTER
Y
CKT BREAKER
BU
S
BA
R
G
G
Figure VII-49
—
A Typical System - Network Extender Wired Between UV Detector and DCU
