Manual

24 • Wiring the Digester Gas Monitor Digester Gas Monitor Operator’s Manual
Figure 12: Digester Gas Monitor External Wiring Diagram
Neutral Ground
L
AC
N G
RS - 485
DP SW EXT DC 24V BATT
B A
ALARM RESET
ALARM BUZZER
CH 4
RELAY-1
NO NC C
Alarm Device
Power
RELAY-CFAIL NO NC CNO NC C
RELAY-A
Red Bla ck
CH 3
RELAY-1
NO NC CNO NC C
CH 2
RELAY-2
NO NC C
CH 1
RELAY-1
CH 1
RELAY-2
NO NC C
4-2 0 m A OUTPUT
GBR
OXY
S
AMP
GW
CH 4
RELAY-2
NO NC C
Buzzer
(Factory wired)
Reset Switch
(Factory wired)
Alarm Device
Power
See Modbus W iring In C hapter9
24V DC
Flow Switch (Factory wired)
AC Power 100/115 V AC 50 / 60 Hz
Line (Hot)
RELAY-B NO NC C
LE L
W
Detector / Transmitter TerminalStrip
(typical 1 of 4)
NO NC C
CH 2
RELAY-1
Strobe TerminalStrip
AC In Terminal Strip
Controller Terminal Strip
NOTE: Line and Neutral are L1 and L2 for
220 VAC Wiring
C
Recording Device
500 O hms Impedance Maximum
NO NC C
NO NC C
CH 3
RELAY-2
Channel Alarm TerminalStrip
Alarm Devices, Typical Alarm W iring Shown Relay Contacts Rated For 10 Amps At 250VAC
Optional Horn/Strobe
Alarm Device, Typical Alarm W iring Shown Relay Contacts Rated For 10 Amps At 250VAC
Common / Channel Alarm TerminalStrip
For Factory Use Only
NO NC C
RELAY-D