The MSM-4S is a high performance 4-port industrial serial communication Mini-PCI module. Port P1 and P2 can be independently configured as RS-232, RS-422 or RS-485 serial Interface by adjusting the on-board DIP switch. Port P3 and P4 are dedicated RS-232 serial interface. Four D-Sub 9-pin to 2x5 IDC ribbon cables are included for connecting to the board's serial port headers.

• Mini-PCI interface, 50 mm height only
• 2x RS-232/422/485 ports, select by DIP switch
• 2x dedicated RS-232 ports
• Baud rate from 50bps to 921.6Kbps
• 16C950 compatible UART with 128-byte FIFO
• Over 700Kbps data throughput for each port running concurrently
• Hardware auto-direction control for RS-485
• Software drivers included for Windows 2003/XP/2000/NT/98/95/ME and Linux

16C950 Compatible High Speed UART

A high-performance 16C950 compatible UART chip with 128-byte FIFO is used for MSM-4S to improve the transmission throughput and reduce the host computer's CPU loading. Over 700Kbps data throughput for each port is guaranteed when all ports run concurrently.

4-port RS-232/422/485 Module Specifications

Hardware

• Bus: Mini-PCI
• IRQ: one IRQ for all serial ports
• No. of Boards: 4 max. (share the same IRQ)
• UART: Oxford 16mPCI954 or compatible
• Connector: 10-pin header for each serial port
• Protection: 15KV ESD for all signals

Serial Port Setting

• P1: RS-232/422/485, select by DIP SW S1,S2
• P2: RS-232/422/485, select by DIP SW S3,S4
• P3,P4: RS-232 only

Serial Port Parameters

• Baud Rate: 50bps to 921.6 Kbps
• Parity: None, Even, Odd, Mark, Space
• Data Bits: 5,6,7,8 bits
• Stop Bit: 1, 1.5, 2 bits
• Flow Control: RTS/CTS, XON/XOFF, None
• Hardware auto-direction control for RS-485

Drivers

• Windows 2003/XP/2000/NT/98/95/ME
• Linux 2.4.12 and above

General

• Power consumption: 200mA@3.3VDC
• Dimension: 59 x 50 mm
• Operation Temperature: 0~55C(32~131F),5~95% RH
• Storage Temperature: -20~85C,5~95% RH
• Regulation: CE/FCC Class A compliant
• Warranty: 2 years

Pin Assignment

Software Utility

Switch Setting

The MSM-4S's port P1 and P2 can operate as either RS-232, RS-422 or RS-485. The DIP switch S1 and S2 are used together to adjust the port P1; the S3 and S4 are used for the port P2.

DIP Switch S1 and S3

DIP Switch S2 and S4