C104H Series

4-port RS-232 ISA serial boards

Larger Image

Evaluation units available for online purchase
>> Buy now (USA only)

Phase-out and Last Buy Notice

The C104H Series will be discontinued starting from July 1, 2017 . The deadline for placing a final purchase order is December 1, 2017. Due to the limited availability of these products, orders will be processed till we run out of stock.
For alternative solution, please 
visit our ISA Serial Boards


Features and Benefits 

  • Cost-effective, compact ISA boards with 4 RS-232 ports
  • 921.6 kbps maximum baudrate for super fast data transmission
  • 16-byte FIFO and on-chip H/W, S/W flow control
  • Drivers provided for Windows, Windows XP Embedded, DOS, Linux 2.4, 2.6, 3, QNX 4/6, FreeBSD, SCO
  • OpenServer, UnixWare 7, Solaris 10
  • Easy configuration, without switches or jumpers



The 4-port C104H/HS ISA boards offer users an economical, high performance multiport serial communication solution for connecting terminals, modems, printers, data acquisition equipment, and other serial devices to a PC. The boards are a top choice of industrial automation engineers and system integrators, and support many different operating systems, including Windows, Linux, and even Unix. In addition, each of the 4 RS-232 ports supports a super fast 921.6 kbps baudrate.

Comm. Controller 16C550C or compatible x 4
Bus 16-bit ISA
Connector DB37 female
Serial Interface
Number of Ports 4
Serial Standards RS-232
Max. No. of Boards per PC 4
Baudrate 50 bps to 921.6 kbps
Serial Communication Parameters
Data Bits 5, 6, 7, 8
Stop Bits 1, 1.5, 2
Parity None, Even, Odd, Space, Mark
I/O Address 0x0000-0xFFFF (default = 0x180)
IRQ 2 (9), 3, 4, 5, 7, 10 (default), 11, 12, 15
Serial Signals
Physical Characteristics
Dimensions 83 x 157 mm (3.27 x 6.18 in)
Driver Support
Windows Windows 95/98/ME/NT/2000, Windows XP/2003/Vista/2008/7/8/8.1 (x86/x64), Windows 2008 R2/2012/2012 R2 (x64), Windows 3.x, DOS, Windows Embedded CE 5.0/6.0, Windows XP Embedded
Linux Linux 2.4.x, 2.6.x, 3.x
Unix-like Systems QNX 6, SCO OpenServer, UnixWare 7, Solaris 10, FreeBSD
Note Please refer to Moxa’s website for the latest driver support information.
Environmental Limits
Operating Temperature 0 to 55°C (32 to 131°F)
Storage Temperature -20 to 85°C (-4 to 185°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
Standards and Certifications
EMC EN 55032/24
EMI CISPR 32, FCC Part 15B Class B
EMS IEC 61000-4-2 ESD: Contact: 4 kV; Air: 8 kV
IEC 61000-4-3 RS: 80 MHz to 1 GHz: 3 V/m
IEC 61000-4-4 EFT: Power: 1 kV; Signal: 0.5 kV
IEC 61000-4-5 Surge: Power: 2 kV
IEC 61000-4-6 CS: 150 kHz to 80 MHz: 3 V/m; Signal: 3 V/m
IEC 61000-4-8 PFMF
IEC 61000
MTBF (mean time between failures)
Time 629,545 hrs
Standard MIL-HDBK-217F
Power Requirements
Input Current 100 mA @ +5 VDC; 100 mA @ +12 VDC; 60 mA @ -12 VDC
Warranty Period 5 years
Details See www.moxa.com/warranty

To request a quote, indicate which items you are interested in below and click "Get a Quote".

Available Models

  Model No. Description
C104H 4-port RS-232 ISA serial board
C104H-DB9M 4-port RS-232 ISA serial board (includes DB9 male cable)
C104H-DB25M 4-port RS-232 ISA serial board (includes DB25 male cable)
C104HS 4-port RS-232 ISA serial board with surge protection
C104HS-DB9M 4-port RS-232 ISA serial board with surge protection (includes DB9 male cable)
C104HS-DB25M 4-port RS-232 ISA serial board with surge protection (includes DB25 male cable)

Optional Accessories

Connection Cables
  Model No. Description
CBL-M37M9x4-30 (Opt4D) DB37(M) to 4 x DB9(M) Cable
CBL-M37M25x4-30 DB37(M) to 4 x DB25(M) Cable

  • © 2018 Moxa Inc. All rights reserved.