1-6 VersaMax® Modules, Power Supplies, and Carriers User's Manual – March 2003 GFK-1504K
1
Network Interface Units
A VersaMax I/O Station consists of a group of VersaMax modules with a VersaMax
Network Interface Unit module and attached power supply in the first position.
VersaMax NIU
power supply
VersaMax Modules
The Network Interface Unit provides I/O scanning and a communications interface,
allowing a group of VersaMax modules to function as an I/O station on a communications
bus. The power supply on the NIU provides power for the modules in the I/O Station.
Additional “booster” power supplies can be included in the system if needed for modules
with high current requirements.
A Network Interface Unit module has connectors appropriate for its communications
network type and status LEDs. NIUs also have rotary dials that can be used to set
communications ID information and other parameters. A Genius NIU is shown below.
SHIELD OUT
SERIAL B2
SHIELD IN
SERIAL A2
SHIELD OUT
SERIAL B1
SHIELD IN
SERIAL A1
0
1
0
0
7
64
5
8
91
1
BAUD
RATE
SBA
X10
3
2
3
2
3
2
GBI001
BUS B
SBA ERR
I/O ENBL
FORCE
PWR
FAULT
OK
SBA
X1
Genius
®
NIU
IC200GBI001
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