OPTO 22 G4LC32, User Manual

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G4LC32 User’s Guide
Wiring
The Local Bus uses a 34-conductor, flat-ribbon cable. There are 12 active lines and 17 ground lines, with the address/
data bus sharing the same line.
ARCNET
Overview
The G4LC32 has an ARCNET connection that can be used as a host port to a computer. You can use an IBM PC to
develop your application with Cyrano 200 or OptoControl, and then download and debug it on any of the G4LC32’s
that are connected to the ARCNET bus.
For very large, distributed-control applications, you can use up to 254 G4LC32 controller(s) networked together via
the ARCNET port.
Pin Signal Function
3
A/D master, 1 - address or
0 - data select
9 IRQ interrupt request
11 DTAK active low
15 DS active low
19 D0 data line or A0 address
21 D1 data line or A1 address
23 D2 data line or A2 address
25 D3 data line or A3 address
27 D4 data line or A4 address
29 D5 data line or A5 address
31 D6 data line or A6 address
33 D7 data line or A7 address
ARCNET Port Specifications
Transfer Rate 2.5 Mb/s
Termination 93 ohms
Address Range 1 to 255, 0 is not allowed
Topology Star
Cable Type RG62A/U
Connector Type BNC Connector
Normal Signal Levels 20 VPP output, 7.5 VPP input
Minimum Signal
Levels
16 VPP output, 6.0 VPP input
Access Time Deterministic (token passing)
COMMUNICATIONS AND CABLES
5-10