Endress+Hauser Liquiphant FTL31 - Overvoltage Protection

Liquiphant FTL31
10 Endress+Hauser
Valve plug, cable
Depending on the assignment of the connector or the wiring of the cable, the device works in either
the MAX or MIN operating mode.
When the cable is wired, one wire of the cable does not have any function in each of the operating
modes (brown in the case of MIN, and gray in the case of MAX). The cable with no function must be
secured against inadvertent contact.
Electrical connection Operating mode
Valve plug MAX MIN
A0022900
3
0.5A
1
K
>20 V
L1/L+ N/L–
A0021219
2
0.5A
1
K
>20 V
L1/L+ N/L–
A0021220
1
31
3
A0021418
1
21
2
A0021420
Cable (cannot be dismantled)
3
L1/L+
0.5A
K
>20 V
1
2
N/L–
A0022161
1
L1/L+
0.5A
K
2
3
N/L–
>20 V
A0022225
A0022902
Core colors:
1 = BK (black)
2 = GR (gray)
3 = BN (brown)
Ground = GNYE (green-yellow)
1
31
3
A0021418
1
21
2
A0021420
K
Yellow LED (ye) not lit
Yellow LED (ye) lit
external load
Overvoltage protection
Overvoltage category II