The Moxa CP-104EL-A Series is a smart 4-port PCI Express serial board engineered for demanding POS, ATM, and industrial automation environments. With each port capable of up to 921.6 kbps baudrate, 128-byte FIFO, and integrated hardware/software flow control, this board delivers fast and reliable data communications.

Its low-profile form factor makes it ideal for compact systems—from mini PCs to standard desktops. The CP-104EL-A requires only a 3.3 VDC power supply and connects via a single DB44 connector, allowing all four RS-232 ports to be accessed through one cable. The board includes robust driver support across a range of operating systems, including Windows, Linux, and UNIX, as well as embedded platforms.

Technical Specifications:

Interface:

• Communication Controller: 16C550C compatible
• Bus: PCI Express 1.0 (x1)
• Connector: DB44 female (via adapter cable to 4x DB9 or DB25)
• FIFO: 128 bytes
• Max. Boards per PC: 8
• Ports: 4
• Serial Standard: RS-232

Serial Communication:

• Baudrate: 50 bps to 921.6 kbps (supports non-standard rates)
• 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
• Signals: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND

Software Support:

• Windows: DOS to Windows 10, Server 2019, including Embedded editions
• 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 for each 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 years manufacturer warranty

Package Contents:

• 1 x CP-104EL-A PCIe board
• 1 x Cable (depending on model):
• DB9: M44 to 4 x DB9-M, 50 cm
• DB25: M44 to 4 x DB25-M, 50 cm
• 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: M44 to 4 x DB9 male cable, 50 cm
• CBL-M44M25x4-50: M44 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