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4-port RS-422/485 PC/104-Plus Module, 921.6 Kbps, 15KV ESD Protection and 2KV Isolation Protection

Product Page @ Moxa Site MOXA Major Lines
Mfg Part Number:  CB-134I  
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Price: $403.66 + Free Shipping
Status: Active
No Sales Tax except these states
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The CB-134I is a 4-port RS-422/485 PC/104-plus module with optical isolation protection that meets the embedded PC standard. The module can be used with PC/104-plus CPU boards that accept the PC/104-plus expansion interface, and optional DB9 and DB25 connection cables are available for connecting to many different devices. The CB-134I's versatile driver support makes the module suitable for a wide range of applications. All products in the series can be used on the PC/104-plus (PCI) bus and provide a reliable, high performance solution for multiport serial communications.

  • Data transmission speed up to 921.6 Kbps
  • On-chip H/W and S/W flow control
  • Serial interface is DIP switch selectable
  • Built-in 15 KV ESD protection
  • Onboard Tx, Rx LED indicators for each port
  • Windows CE 5.0 and XP embedded operating systems supported
  • Wide temperature model suitable for -40 to 85°C environments

I/O controller
MU860 (16C550C compatible)
Connector type
40-pin box header

PC/104-plus (PCI) bus
No. of Ports
RS-422: TxD+(B), TxD-(A), RxD+(B), RxD-(A), GND
4-wire RS-485: TxD+(B), TxD-(A), RxD+(B), RxD-(A), GND
2-wire RS-485: Data+(B), Data-(A), GND

50 bps to 921.6 Kbps
Max. No. of Ports
16 (4 boards)

None, even, odd, space, mark
Data bits
5, 6, 7, 8
Stop bits
1, 1.5, 2
I/O address/IRQ
BIOS assigned
128 bytes
DIP Switches
For Serial Interface.

 Operating Systems
Driver support
DOS, Windows 2000/XP/2003, Windows XP
Embedded, Windows CE 5.0, Linux 2.4, Linux 2.6
 Power and Environment
Operating Temperature
0 to 55°C (32 to 131°F)
-40 to 85°C (-40 to 185°F) for -T models
Operating Humidity
5 to 95% RH
Storage Temperature
-40 to 85°C (-40 to 185°F)
Surge Protection
Embedded 15 KV ESD Surge Protection
Dimensions (W x D)
96 x 90 mm
Regulatory Approvals
EN55022 Class A, EN55024, EN6100-3-2, EN61000-3-3, FCC Part 15 Class A
5 years


Power Requirements
Power Consumption 236 mA @ 5 VDC
Serial Communication Parameters
Data Bits 5, 6, 7, 8
Parity None, Even, Odd, Space, Mark
Stop Bits 1, 1.5, 2
FIFO 128 bytes
IRQ Assigned by BIOS
I/O Address Assigned by BIOS
Connector 40-pin box header
DIP Switches Serial interface
Bus PC/104-Plus bus
Comm. Controller MU860 (16C550C compatible)
Baudrate 50 bps to 921.6 Kbps
Environmental Limits
Operating Temperature Standard Models: 0 to 55°C (32 to 131°F) 
Wide Temp. Models: -40 to 85°C (-40 to 185°F)
Storage Temperature -40 to 85°C (-40 to 185°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
MTBF (mean time between failures)
Time 534,809 hrs
Database Telcordia (Bellcore), GB
Physical Characteristics
Dimensions 90 x 96 mm (3.54 x 3.78 in)
Serial Interface
Serial Standards RS-422/485
Number of Ports 4
Max. No. of Boards per PC 4
Serial Line Protection
ESD Protection 15 KV on the board
Optical Isolation 2 KV
Serial Signals
RS-485-4w TxD+(B), TxD-(A), RxD+(B), RxD-(A), GND
RS-485-2w Data+(B), Data-(A), GND
RS-422 TxD+(B), TxD-(A), RxD+(B), RxD-(A), GND
Standards and Certifications
EMI EN 55022, EN 61000-3-2, EN 61000-3-3, FCC Part 15 Subpart B Class A
EMS EN 55024, IEC 61000-6-2, IEC 61000-6-4, IEC 61000-4-2, IEC 61000-4-3, IEC 61000-4-4, IEC 61000-4-5, IEC 61000-4-6, IEC 61000-4-8, IEC 61000-4-11 (DIPS)
Green Product RoHS, CRoHS, WEEE
Driver Support
Operating Systems Windows 9X/ME/NT/2000, Windows XP/2003/Vista/2008/7 x86/x64, Windows CE 5.0/6.0, Windows XP Embedded, DOS, Linux 2.4, Linux 2.6 x86/x64, QNX 6
Note Please refer to Moxa's website for the latest driver support information.
Warranty Period 5 years
Details See

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