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| Item Code | USB-COM-2SM | USB-FLEXCOM4 | USB-COM232-4A |
| IO Connections | All RS-232 signals are supported and present at the DB9 connectors RS-422 Data Signals: Tx+, Tx-, Rx+, Rx-, GND RS-485 Data Signals: 2-wire: Tx/Rx+, Tx/Rx-, GND 4-wire: Tx+, Tx-, Rx+, Rx-, GND Jumper selectable termination | ||
| Serial Data Rates | Up to 230.4K bps, asynchronous for RS-232 Up to 921.6K bps, asynchronous for RS-422 and RS-485 | Up to 921.6k for RS-422/485 modes, 230.4kbps for RS-232 | Up to 921.6k for RS-422/485 modes, 230.4kbps for RS-232 |
| Multidrop | Compatible with RS-485 specifications - Up to 32 drivers and receivers allowed on line. Driver / Receiver type SP491. | ||
| Serial Ports | COM A through COM D via four | COM A through COM D via four male DB9 connectors | |
| Character length | 5, 6, 7 or 8 data bits | 5, 6, 7, or 8 bits | 5, 6, 7, or 8 bits |
| Parity | Even, odd or no parity | Even, odd or none | Even, odd or none |
| Stop Interval | 1, 1.5 or 2 Stop Bits | 1, 1.5, or 2 bits | 1, 1.5, or 2 bits |
| Receiver Input Sensitivity | ±200 mV differential input | +200 mV, differential input | +200 mV, differential input |
| Common Mode Rejection | |||
| Common Mode Voltage | +12V to -7V | ||
| Transmitter Output Drive | 6- mA with thermal shutdown | Up to 60 mA, with thermal shut down | Up to 60 mA, with thermal shut down |
| Termination | Jumper selectable per channel for RS-485 mode | ||
| Bias | On-board from factory on transmit lines for RS-422 and RS-485 | ||
| Bus Type | USB 1.1 Full-speed, USB 2.0 High-speed compatible | USB 2.0 Full-Speed | USB 2.0 Full-Speed |
| USB Connector | Type B, high-retention | Type B, high-retention | |
| Embedded USB Connector | 5-pin header, Molex part number
53047 Mating connector housing is Molex part number 51021 0500 | 5-pin header, Molex part number
53047 Mating connector housing is Molex part number 51021 0500 | |
| Operating Temperature | 0º to +60º C | 0 ºC. to +60 ºC | 0 ºC. to +60 ºC |
| Storage Temperature | -50º to +120º C | -50 ºC. to +120 ºC | -50 ºC. to +120 ºC |
| Humidity | 5% to 95% RH, non-condensing | 5% to 95%, non-condensing | 5% to 95%, non-condensing |
| Power Required | +5VDC provided via USB bus up to 500mA 5V@ 120mA maximum 0-60mA for each COM channel | 5VDC at approximately 110 mA (plus loads up to an additional 240 mA) from USB bus | 5VDC at approximately 110 mA (plus loads up to an additional 240 mA) from USB bus |
| Board Dimensions | 3.550 x 3.775 inches. | 3.550 x 3.775 inches (PC/104 size & mounting) | 3.550 x 3.775 inches (PC/104 size & mounting) |
| Box Dimentions | 3.780 x 4.170 x 1.800 inches high. | 4.00 x 4.00 x 1.25 inches | 4.00 x 4.00 x 1.25 inches |
Data subject to change without notice