PCI20EX Serie - PCI Express ARCnet Karte

PCI20EX Serie - PCI Express ARCnet Card

The PCI20EX Series of cards from Contemporary Controls provide ARCNET functionality for the PCI Express (PCIe) bus — demonstrating a continuing commitment to ARCNET technology and customer requirements.

PCI20EX boards incorporate the COM20022 ARCNET controller chip which supports command chaining, sequential access to internal RAM, and duplicate node ID detection. Bus contention problems are minimized since the module’s interrupt level and I/O base address are assigned through Plug-and-Play (PnP) operation.

The PCI20EX Series supports high speed communications Using EIA-485 transceivers — DC-coupled and AC-coupled (transformer) variants. Conventional 2.5 Mbps dipulse signalling is also supported on the traditional coaxial and twisted-pair models.

Each PCI20EX card provides two LEDs for monitoring network operation and PCI bus access to the unit. It is equipped with an 8-position, general-purpose DIP switch which could be used to assign the ARCNET node address. Ultimately, the node address is configured via software so the DIP switch can be used for special purpose user-defined configuration options.

Details zur PCI20EX Serie

• Interfaces ARCNET with PCI Express capable computers
• Automatic configuration of I/O and interrupt
• High-speed I/O access to its ARCNET controller
• Supports coaxial and twisted-pair cabling including EIA-485
• CE Mark
• RoHS compliant
• Enhanced software capabilities over earlier generation ARCNET controllers
• Suitable with all Contemporary Controls MOD HUB and AI Series active hubs
• Variable data rates up to 10 Mbps utilising the various EIA-485 transceiver options

Analoge Signale

Coaxial Bus Topology (PCI20EX-CXB)

Cards with –CXB transceivers accept RG-62/u cable via BNC Tee connectors. Each node maintains 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 (PCI20EX-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. No more than two cards can exist on a cabling segment — because a -CXS card provides the 93Ω of termination internally.

 Twisted-Pair Bus Topology (PCI20EX-TB5)

Using dual RJ-45 jacks, a -TB5 dipulse transceiver supports up to 8 devices and 122 metres of shielded or unshielded twisted-pair. RJ-45 style 93Ω terminators must be applied at each end of the bus.

EIA-485 (Digital) Signale

DC-coupled EIA-485 (PCI20EX-485 or PCI20EX-485D)

EIA-485 backplane mode is invoked in the -485 card via user software and in the -485D card via the card’s own hardware. Either card uses a 3-terminal screw connector* for twisted-pair up to 274 metres 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  (PCI20EX-4000 or PCI20EX-485X)

EIA-485 backplane mode is invoked in the -4000 card via user software for segments up to 80 metres in length and up to 8 nodes. Backplane mode is invoked by the hardware in the -485X card which supports up to 13 devices and a segment length of 213 metres. The -4000card uses dual RJ-45 jacks. The -485X card uses a 3-terminal screw connector*. Apply 120Ω termination at each end of the bus.

* Dual RJ-45 sockets replace the 3-pin connector if the /J model is specified (see Ordering Information).