Overvoltage Protection - Endress+Hauser Liquiphant FTL31 Manual

Overvoltage protection

10
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
Valve plug
A0022900
Cable (cannot be dismantled)
A0022902
Core colors:
1 = BK (black)
2 = GR (gray)
3 = BN (brown)
Ground = GNYE (green-yellow)
Yellow LED (ye) not lit
Yellow LED (ye) lit
K external load
Overvoltage category II
Operating mode
MAX
1
3
>20 V
K
0.5A
L1/L+ N/L–
A0021219
1 3
1 3
A0021418
3
2
1
>20 V
K
0.5A
L1/L+ N/L–
A0022161
1 3
1 3
A0021418
Liquiphant FTL31
MIN
1
2
>20 V
K
0.5A
L1/L+ N/L–
A0021220
1 2
1 2
A0021420
3
2 1
>20 V
K
0.5A
N/L– L1/L+
A0022225
1 2
1 2
A0021420
Endress+Hauser