Contemporary Control Systems PC10420 Adapters - Manual

PC10420
ARCNET® Network Interface Modules for PC/104 Bus Computers
INSTALLATION GUIDE
INTRODUCTION
The PC10420 series of ARCNET network interface modules (NIMs) links
PC/104 compatible computers with the ARCNET local area network (LAN).
ARCNET is classified as a token-bus LAN operating at a nominal 2.5 Mbps
while supporting 255 nodes. Interfacing ARCNET to a host computer
usually requires a NIM which plugs into the host computer’s bus.
The PC10420 incorporates the newer COM20020 ARCNET controller chip
with enhanced features over the earlier generation ARCNET chips. New
performance and integration enhancements include command chaining
operation and an internal 2K x 8 RAM buffer. There is no requirement for
wait-state arbitration.
Each PC10420 module has two LEDs on the board. The green LED
indicates that the module is receiving data on the network and the yellow
LED indicates bus access to the module. The PC10420 also has a piano
style DIP switch so that node addresses can be easily reassigned without
removing the module.
There are several versions of the PC10420 ARCNET NIM. The
PC10420-CXS supports coaxial star configurations requiring external
active or passive hubs. The PC10420-CXB supports coaxial bus
configuration usually requiring no hubs. Other versions include the
PC10420-FOG which supports fiber optic cable with either ST or SMA
connectors. The PC10420-TPB supports twisted-pair bus cabling using
RJ-11 and screw terminal connectors. There are various versions that
support EIA-485 communication each using RJ-11 and screw terminal
connectors.
On some models, operation up to 5.0 Mbps is possible. These models are
identified with a /5 designation.