Norgren VS18 Series Valve Advantage - Manual (Page 76)

VS18/VS26 MAINTENANCE & INSTRUCTION BOOKLET
8.6 AS-I NTERFACE
Norgren AS-Interface Fieldbus systems conform to AS-I V2.11
specification.
Communication system:
2-wire ASi bus
communication, electronic
and input power
Number of nodes per network: Master + 31 slaves (62 slaves for V2.1-slaves which do
not use four outputs). The VS18/VS26 ASi valve islands
always has four outputs.
Total number of I/O per network: 248
Bus topology: Tree
Note:
The valve island must be mounted on an earthed base to meet the EMC directives.
8.6.1 AS-Interface pin assignment
M12 4-pin bus connector (IP65)
Male Pin no. Function Max. current
1 AS-I + 3)
2 - -
3 AS-I – -
4 - -
Looking into node connector
M12 4-pin power connector for AS-Interface (IP65)
Male Pin no. Function Tolerance Max. current
1 +24V DC +/-10% 4)
2 - - -
3 0V - -
4 - - -
Looking into node connector
3) Single slave: 40mA
Double slave: 75mA
4) Single slave: I
max
= 20mA + n*60mA
Double slave: I
max
= 35mA + n*60mA
n = number of energized solenoids
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