CT-N118

CorNet ARCNET Adapter PC Twisted Pair QNX

Compatible with QNX 2 & QNX 4 Two RJ11 Connectors Bus or Star Topology Category 3 unshielded twisted pair European CE compliance +5VDC@1A max., -12VDC@21mA Operating: 0C to 43C, 5% to 80% (non-condensing) Where secure and robust communications are needed, ARCNET is a proven solution. Well suited for real-time control applications, ARCNET eliminates transmission collision on bust networks. Why CorNet Adapters?

• Fully compatible with QNX 4, most support QNX 2
• Menu selectable node id, timeouts and interrupt level
• Specialized adapters including Coax, Twisted Pair, Fiber Optics (both commercial and industrial temperature)
• Individually tested to meet network signal requirements
• Elevated temperature burn-in for maximum reliability and operation in harsh environments

Consider Fiber Optics

With fiber optics, you combine the reliability of ARCNET with the noise immunity and security of optical fiber. These are especially suited if your network is in a harsh environment or you need to span large distances. Fiber optic cabling is not affected by electromagnetic interference, short circuits, grounding problems, or static discharges. Point-to-point distances of 8000 feet (2.5 kilometres) are typical. Maximum distances depend on the fiber optic cable type. Networks using only fiber optic cabling may use extended time-outs to span distances greater than 30 km.

ARCNET Specifications:

• Modified Token Passing Local Area Network
• 2.5 Megabaud transmission
• Supports up to 255 nodes
• Coax cable lengths up to 2000 ft (600m)
• Twisted pair cable lengths up to 400 ft (120m)
• Fiber cable lengths typically up to 8000 ft (2.5 km)

How confident are we?

Before any CorNet product leaves our factory, we run it through an intensive burn-in procedure which isolates marginal components which other manufacturers'inspections often miss.

During our burn-in the adapters and hubs are turned on and connected to an operational LAN running diagnostic software. Then we raise the ambient temperature abnormally high for computer equipment (43C or 110F), creating even higher temperatures at the surface of the printed circuit board.

Our workmanship and quality control are second to none. If you're looking for reasonably priced ARCNET hubs and adapters for a harsh environment or just want the confidence of high reliability hubs and adapters for your office, the CorNet ARCNET products are for you.

DESCRIPTION

This is a twisted pair ARCNET adapter. It combines the advantages of ARCNET with the low cost of twisted pair wiring. This adapter is fully compatible with both QNX 2 and QNX 4.

OPERATING ENVIRONMENT

Operating Temperature:
0 to 43C

Storage Temperature:
-40 to 125C

Humidity:
5% to 80% (non-condensing)

Signal Levels:
Transmit: 15.4 Vp-p
Receive sensitivity: 3.0 Vp-p

Arcnet LAN INTERFACE

• Modified Token Passing Local Area Network
• 2.5 Megabaud transmission
• Supports up to 255 nodes
• Requires only 8 kbytes of Address Space
• IBM PC, XT, AT and compatible
• Switch selectable memory map base address (CC00,CE00,DC00,DE00,EC00,EE00)
• Menu selectable node ID and interrupt level (levels 2,3,4,5,6 & 7)
• 2 KB dual ported RAM buffer for high speed interleaved message transfer
• Software reset capability

PHYSICAL SPECIFICATIONS

• PCB mounted low profile BNC connector to RG-62 A/U 93 Ohm coaxial cable
• LED indicators: Green indicates the network is operating normally. Red - indicates node activity
• Short length 8 Bit ISA Bus Card ( 4.97" long)

INSTALLATION CONSIDERATIONS

Twisted Pair Cable type:
Category 3 or better unshielded twisted pair

Twisted Pair Distances:
From node to hub 400 ft. (120 m)
Total network span up to 4400 ft. (1320 m)
Maximum of 10 active hubs may be between any two nodes on the network

CONFORMS TO THE FOLLOWING STANDARDS

EMC:
EN55022:1994 (Emissions)
CISPR 22 1993-12 Class A
FCC Part 15 Class A
EN 50082-1 (Immunity)
IEC 801-2:1991, 4KV Contact, 8KV Air
IEC 801-3:1984, 3V/m
IEC 801-4:1988, 0.5 KV Signal line, 1 KV Power line

European CE compliance