 | | | |
|
|
|
| | |
|
|
|
This image is representative of the product and may not be the exact image of this product.
| Model: PCA66 |
| Manufacturer: Contemporary controls | | 16-bit ISA Bus Compatible ARCNET Network Interface Module |
| Product Status: Discontinued - This product is no longer in production. This page is maintained for informational purposes only. Stock Status: Not Available |
|
| |
|
|
| The PCA66 Series of network interface modules (NIMs) connects ISA compatible computers with the ARCNET local area network (LAN).
ARCNET is classified as a token-bus LAN operating at 2.5 Mbps while supporting 255 nodes. Interfacing ARCNET to a host computer usually requires a Network Interface Module which plugs into the host computer's bus.
The PCA66 is manufactured with the 16-bit COM90C66 ARCNET controller chip with improved attributes over earlier ARCNET chips. New features are command chaining and sequential I/O mapping of the internal RAM buffer. There is typically no requirement for wait-state arbitration. The PCA66 is backward compatible with earlier 90C26 and 90C65 8-bit ARCNET controllers and will operate as a replacement. In order to use the expanded features of the COM90C66, an enhanced software driver is necessary.
Each PCA66 module has two LEDs on the board. The green LED indicates that the module is transmitting data on the network, and the yellow LED indicates bus access to the module. The PCA66 also has an external DIP switch so that node addresses can be easily reassigned without removing the module.
An 8-bit DIP switch is used to set the ARCNET node address. Any value excpet zero is a valid ARCNET node address. If zero is set in the switches, the ARCNET LAN adapter will disable its transmitter and not join the network until a non-zero node ID is set via software. The RAM buffer cannot be accessed when the node ID is zero.
Five versions of the PCA66 exist. The PCA66-CXS supports coaxial star configurations requiring external active or passive hubs to extend a bus segment beyond 1000 feet. The PCA66-CXB accommodates coaxial bus configuration usually requiring no hubs. The maximum segment length is 1000 feet and the maximum number of Network Interface Modules that can be connected to a segment is eight.Other models are the PCA66-FOG that supports fiber optic cable with either ST or SMA connectors. With fiber optic connections only star and distributed star toplogies are supported. The PCA66-TPB supports twisted-pair bus cabling using RJ-11 or screw terminal connectors.
Features
- Utilizes COM90C66 16-bit ARCNET controller
- Interfaces ARCNET with AT (ISA ) bus computers
- Zero wait-state arbitration typical
- Deterministic, high-speed 2.5 Mbps ARCNET token-passing local area network (LAN)
- COM90C26/90C65 software compliant
- Command chaining for enhanced performance
- Supports coaxial, fiber optic and twisted-pair cabling
- Supports either memory mapped or I/O mapped RAM buffer
- Node address switch selects one of 255 possible station addresses
- Boot ROM socket for diskless workstations
- Suitable with all the Contemporary Controls' MOD HUB and AI series active hubs
- CMOS design for low-power consumption
- CE Mark
|
| More Info |
|
|
|
|
|
|
|
|
|
