The CP-104EL-A Series from Moxa is a compact and high-performance 4-port RS-232 serial board based on PCI Express technology. Engineered for industrial use in POS systems, ATMs, and automation solutions, this board delivers data rates up to 921.6 kbps per port. It features a 128-byte FIFO, along with on-chip hardware and software flow control, to ensure fast and stable serial communication.

The board complies with PCI Express 1.0 and fits into any PCIe slot. Its low-profile design makes it suitable for small enclosures, including mini-PCs and slim desktops. The DB44 connector supports four RS-232 ports through a bundled breakout cable available in either DB9 or DB25 format. Maintenance is simplified with built-in Tx/Rx LEDs for each port. Broad OS support—including Windows, Linux, and UNIX—ensures wide compatibility, even in embedded environments.

Technical Specifications:

Interface:

• Communication Controller: 16C550C compatible
• Bus: PCI Express 1.0 (x1)
• Connector: DB44 female
• FIFO: 128 bytes
• Ports: 4
• Max. Boards per PC: 8
• Serial Standards: RS-232

Transmission Parameters:

• Baudrate: 50 bps to 921.6 kbps (supports non-standard values)
• Data Bits: 5, 6, 7, 8
• Stop Bits: 1, 1.5, 2
• Parity: None, Even, Odd, Space, Mark
• Flow Control: None, RTS/CTS, XON/XOFF
• RS-232 Signals: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND

Software Support:

• Windows: DOS to Windows 10, Server 2019 (x86/x64), CE 5.0/6.0, XP Embedded
• Linux: Kernel 2.4.x to 5.x
• UNIX: QNX 6, Solaris 10, UnixWare 7, SCO OpenServer 5/6

Power Parameters:

• Input Current: 805 mA @ 3.3 VDC

Physical Characteristics:

• Dimensions: 67.21 x 103 mm
• LED Indicators: Built-in Tx/Rx LEDs per port

Environmental Limits:

• Operating Temperature: 0 to 55 °C
• Storage Temperature: -20 to 85 °C
• Humidity: 5 to 95% RH (non-condensing)

Certifications:

• EMC: EN 55032/35
• EMI: CISPR 32, FCC Part 15B Class B
• EMS: IEC 61000-4-2/3/4/5/6/8
• Environmental: RoHS, CRoHS, WEEE compliant

Reliability:

• MTBF: 3,601,447 hours
• Standard: Telcordia (Bellcore) TR/SR

Warranty:

• 5-year manufacturer warranty

Package Contents:

• 1 x CP-104EL-A serial board
• 1 x Cable (model dependent):
• M44 to 4 x DB9-M, 50 cm (DB9M model)
• M44 to 4 x DB25-M, 50 cm (DB25M model)
• 1 x Quick installation guide
• 1 x Warranty card

Ordering Information:

• CP-104EL-A-DB9M: 4 x RS-232, includes CBL-M44M9x4-50
• CP-104EL-A-DB25M: 4 x RS-232, includes CBL-M44M25x4-50

Accessories (sold separately):

• CBL-M44M9x4-50: DB44 to 4 x DB9 male cable, 50 cm
• CBL-M44M25x4-50: DB44 to 4 x DB25 male cable, 50 cm
• CBL-F9M9-20: DB9 female to DB9 male cable, 20 cm
• CBL-F9M9-150: DB9 female to DB9 male cable, 1.5 m