Westermo Viper 408 - Manual (Page 9)

9 6641-2201
Interface specifications
Power and fault relay port PWR
Rated voltage
24 to 110 VDC
Operating voltage 24 to 110 VDC ±40%
Rated current 40 mA @ 110 VDC
140 mA @ 24 VDC
Rated frequency DC
Inrush current, I 2 t Max 0.02 A 2 s @ 24 – 110 VDC
Startup current * 7 A
peak
@ 24 – 110 VDC
Polarity Reverse polarity protected
Redundant power input No
Isolation to Connections X1 – X8 and to ground, 1500 VAC.
Fault relay belongs to the same isolation group as the power
supply lines (fault relay signals are also contained within
PWR).
Connection 4 pin male M12 connector with A-code
Connector size M12, recommended cable area 0.5 mm 2 recommended
(minimum 0.25 mm 2 ), cable dimensions depend on choice of
M12 connector
Shielded cable Not required, twisted pair is recommended
Fault relay resistance < 10 Ω
Operating voltage Up to 110 VDC
Max continuous current 250 mA
* If external power supply is used it must meet specified startup current.
M12 A-Coded
Power
Connector
Position Direction Description
1 U+ Positive supply voltage
2 Out Alarm relay (status) +
3 0 V Negative supply voltage
4 Out Alarm relay (status) –
Housing Shield Chassis of product (ground)