Xylem Flygt FGC 421 - 7.4 Connect a 4-20 mA level sensor; 7.5 Connect a pump sensor circuit

7.4 Connect a 4–20 mA level sensor
P2 SENSOR
L1
AC~
L2 L3
PE
DO 1
NO COM NO COM
DO 3
NO COM NC
+
24V OUT
T1 T2
P1 SENSOR
T1 T2 +
DI 1
+
MUTE
H
P2 H/O/A
O
RS485
+ IN
AI 1
STOP
FLO AT SWITCHES
STBY
+
ALARM 24V
H
P1 H/O/A
O
HIGH
1
2
3 4
HMI
5
DO 2
RS232
N
USB
A B GND
DUTY
WS009657A
Select one of the following steps to connect the two wires from the level
sensor to the terminals.
Condition Action
The sensor is passive. Voltage is supplied by the control unit. Connect to the + and IN terminals.
The sensor is active. Voltage is supplied by the sensor. Connect to the IN and − terminals.
7.5 Connect a pump sensor circuit
P2 SENSOR
L1
AC~
L2 L3
PE
DO 1
NO COM NO COM
DO 3
NO COM NC
+
24V OUT
T1 T2
P1 SENSOR
T1 T2 +
DI 1
+
MUTE
H
P2 H/O/A
O
RS485
+ IN
AI 1
STOP
FLO AT SWITCHES
STBY
+
ALARM 24V
H
P1 H/O/A
O
HIGH
1
2
3 4
HMI
5
DO 2
RS232
N
USB
A B GND
DUTY
WS009658A
1 2
1. Pump 1
2. Pump 2
Connect the pump sensor circuits to terminals T1 and T2.
7 Electrical Installation
Flygt FGC 400 Installation, Operation, and Maintenance 21