Xylem Flygt FGC 421 - 7.8 Connect an external alarm silencing or alarm reset signal; 7.9 Connect an external hand-off-auto switch

7.8 Connect an external alarm silencing or alarm reset signal
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
WS009660A
Connect an external switch to the terminals.
The switch has two functions:
– Momentary activation: The alarm is silenced.
– Activation 10 s: The alarm is reset.
7.9 Connect an external hand-off-auto switch
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
1
2
WS009661A
1. Pump 1
2. Pump 2
Connect the hand-off-auto switch.
Auto mode is active if neither H or O is switched to common.
Terminal Description
H Hand
− Common
O Off
7 Electrical Installation
Flygt FGC 400 Installation, Operation, and Maintenance 23