104-COM-4SM - 4x RS-232, 4x RS-485, 4x RS-485 Serial Ports

System
Compactflash	I/O Connections: Via a 50 pin IDC type right angle connector. There are four pins per port plus common grounds. Character Length: 5,6,7, or 8 bits Parity: Even, odd, or none Stop Interval: 1, 1.5, or 2 bits Serial Data Rates: Up to 115.2K baud, asynchronous. A faster range of rates, up to 921.6K, is achieved by jumper selection. Multidrop: Compatible with RS-485 specifications. Up to 32 drivers and receivers allowed on line. Driver/Receivers used are type 75ALS180. Compatible with RS-422 specifications. Up to ten receivers allowed on line. Address: ISA BUS address is set by jumpers on the board. A “Default” jumper determines whether the channel addresses are sequential or loaded from nonvolatile memory on the board. Interrupts: Individual IRQs for each channel are stored onboard in non-volatile memory. Receiver Input Sensitivity: ±200 mV differential input Common Mode Voltage Range: +12V to -7V Transmitter Output Drive Capability: 60 mA with thermal shutdown. Jump
Environment	Operating Temperature: 0 to 70°C, (-40 to +85°C Optional) Storage Temperature Range: -50 to +120°C Humidity: 5% to 95% RH, non-condensing Power Required: +5 VDC at 80 mA typical, all outputs open

Features:

8 or 4 independent asynchronous serial COM ports
Auto-RTS feature makes half-duplex RS-485 communications effortless
Field selectable RS-422 and RS-485, independent for each port
Fixed bias and jumper selectable termination provided on each transmit and receive channel simplifies cabling
Low power required: +5VDC at 80 mA typical
Operates as a standard COM port in all operating systems
Programmable individual non-volatile base addresses and IRQs simplifies installation
Speeds up to 921.6K

Vox Technologies