CI-134 Series *EoL*


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End of Life product

Please note that the CI-134 Series has been phased out, and has been replaced by the CP-114EL Series. If you have further questions, please contact us for more details.


4-port RS-422/485 PCI Express boards with optional 2 kV isolation


Features and Benefits

  • Cost-effective ISA boards with 4 RS-422/485 ports
  • RS-485 data direction control with ADDC® or by RTS
  • 921.6 Kbps maximum baudrate for super fast data transmission
  • 16-byte FIFO and on-chip hardware flow control
  • Surge protection and optical isolation available
  • Built-in termination resistors



The CI-134 series ISA boards come with 4 independent RS-422/485 serial ports for connecting data acquisition equipment and other serial devices to a PC. Connect your devices over longer distances—up to 1.2 km (4000 ft)—and ensure greater reliability in industrial environments with on-board surge protection and optical isolation (available with some models). Enjoy greater versatility by using point-to-point full duplex connections, or set up a half duplex RS-485 multi-drop network.


Comm. Controller 16C550C or compatible x 4
Bus 16-bit ISA
Connector DB37 female
Serial Interface
Number of Ports 4
Serial Standards RS-422/485
Max. No. of Boards per PC 4
Serial Line Protection
ESD Protection 25 KV on the board (CI-134IS only)
Optical Isolation 2 KV (CI-134I/IS only)
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
RS-422 TxD+(B), TxD-(A), RxD+(B), RxD-(A), RTS+(B), RTS-(A), CTS+(B), CTS-(A), GND
RS-485-4w TxD+(B), TxD-(A), RxD+(B), RxD-(A), GND
RS-485-2w Data+(B), Data-(A), GND
Driver Support
Operating Systems Windows 9X/ME/NT/2000, Windows XP/2003/Vista/2008/7 x86/x64, Windows 3.x, Windows XP Embedded, DOS, Linux 2.4, Linux 2.6 x86/x64, SCO Open Server 5/6, UnixWare 7, QNX 4/6, FreeBSD 4/5, Solaris 10 x86/x64
Note Please refer to Moxa’s website for the latest driver support information.
Physical Characteristics

CI-134: 85 x 160 mm (3.35 x 6.30 in)

CI-134I/IS: 110 x 180 mm (4.33 x 7.09 in)

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
EMI EN 55022, FCC Part 15 Subpart B Class B
EMS EN 61000-4-2, EN 61000-4-3, EN 61000-4-4
Green Product RoHS, CRoHS, WEEE
MTBF (mean time between failures)
Time 424,655 hrs
Database Telcordia (Bellcore), GB
Power Requirements
Power Consumption

CI-134: 450 mA max. @ +5 V

CI-134I: 610 mA max. @ +5 V

CI-134IS: 620 mA max. @ +5 V

Warranty Period 5 years
Details See