PC10422 Serie - PC/104 zu ARCnet Adapter

ARCnet Interface Modules for PC/104 Bus Computers

Like the PC10420 Series of Network Interface Modules (NIMs), the PC10422 Series enables ARCNET connectivity for PC/104 compatible computers. But this series is designed with the more advanced ARCNET controller chip which is the COM20022.

The COM20022 controller chip has benefits such as command chaining, sequential access to internal RAM, and duplicate node ID detection. Bus contention problems are decreased since the module only requires an I/O address. There is no requirement for wait-state arbitration. The +5 V only operation reduces system cost by eliminating multiple-voltage power sources.

Each NIM has two LEDs to monitor network operation and bus access. An 8-bit DIP switch can set the node address without the removing the module. The node address can be configured via software — leaving the DIP switch for user-defined functions such as data rate, cable interface, or master/slave status of the system.

This series implements three EIA-485 physical layers. The PC10422-485D supports DC-coupling while the PC10422-485X provides transformer coupling. If your software will set the backplane mode, choose the PC10422-4000 (transformer-coupled). All EIA-485 models are fitted with dual RJ-11s and a three-position screw terminal connector to ease field wiring.

Details zur PC10422 Serie

• Supports coaxial and twisted-pair cabling including EIA-485
• Command chaining for enhanced performance
• Node address switch selects one of 255 possible station addresses
• Variable data rates up to 10 Mbps
• Suitable with all Contemporary Controls’
• MOD HUB and AI Series active hubs
• CMOS design for low-power consumption
• CE Mark
• RoHS compliant
• Utilizes COM20022 ARCNET controller
• Interfaces ARCNET with PC/104 bus computers
• Zero wait-state arbitration typical
• Enhanced software capabilities over earlier generation ARCNET controllers

Analoge Signale

Coaxial Bus Topology (PC10422-CXB)

Cards with –CXB transceivers accept RG-62/u cable via BNC Tee connectors. Each node is a high-impedance in both powered and unpowered states. BNC-style 93Ω terminators must be applied to both ends of a bus segment. The maximum segment length is 305 metres and up to 8 devices can share the segment.

Coaxial Star Topology (PC10422-CXS)

In a –CXS coaxial star system, devices connect in a point-to-point fashion with RG-62/u coaxial cabling not exceeding 610 metres. If more than two cards share the cabling, a hub is needed. A -CXS card provides the 93Ω of termination internally.

Twisted-Pair Bus Topology (PC10422-TPB)

A –TPB dipulse transceiver supports up to 8 devices and 122 metres of shielded or unshielded twisted-pair. Apply terminators at each end of the bus.

EIA-485 (Digital) Signale

DC-coupled EIA-485 (PC10422-485D)

Backplane mode is invoked in the -485D card via the card’s own hardware for twisted-pair up to 274 m in length and up to 17 nodes. Use proper cable and maintain wiring phase integrity among all nodes. Use 120Ω termination and proper bias at each end of the bus.

AC-coupled EIA-485 (PC10422-4000 or PC10422-485X)

For backplane operation controlled by software, the -4000 card supports up to 8 devices and a segment length of 80 m. Backplane mode is set by hardware in the -485Xcard which supports up to 13 devices and a segment length of 213 m. Apply 120Ω termination at each end of the bus for either card.