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8 port RS-422/485 async board, Universal PCI bus, 921.6Kbps, embedded 15KV ESD protection

Product Page @ Moxa Site MOXA Major Lines
Mfg Part Number:  CP-138U  
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Price: $407.17
In Stock: 8
No Sales Tax except these states
, PO and Wire.

The CP-118U-I and CP-138U-I smart, 8-port serial boards are designed for long distance, multi-point, PC-based data acquisition applications. Industrial automation system integrators will be eager to use this board for many of their industrial automation projects.

On-chip ADDCTM for Precision RS-485 Communication
RS-485 communication requires precise timing control to enable and disable the line driver, and the MOXA Turbo Serial EngineTM chip that powers the CP-118U-I and CP-138U-I card comes with on-chip ADDCTM (Automatic Data Direction Control) to make RS-485 as easy to use as RS-232.

RS-485 multidrop for up to 31 devices within 1.2 km
The CP-118U-I's 8 RS-232/422/485 ports and the CP-138U-I's 8 RS-422/485 ports can achieve data rates up to 921.6 Kbps, and in RS-485 mode, the serial port can connect up to 31 daisy-chained RS-485 devices within a range of 1.2 km. For long distance RS-485 communication, 2 KV optical isolation protection is available to prevent equipment damage.


Over 700 Kbps data throughput for top performance
128-byte FIFO and on-chip H/W, S/W flow control
Universal PCI compatible with 3.3/5V PCI and PCI-X
Serial communication speed up to 921.6 Kbps
Windows Vista/2003/XP/2000, and Linux driver support
Easy maintenance with on-board LED display, and management software
On-board 15 KV ESD and 2 KV optical isolation protection


Female DB78
Comm. Controller
MU860 (16C550C compatible)
Bus Interface
32-bit Universal PCI
Number of Ports
8 (only one IRQ required)
Max No. of Boards
TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND (CP-118U-I only)
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
Data Bits
5, 6, 7, 8
Stop Bit(s)
1, 1.5, 2
I/O address/IRQ
BIOS assigned
None, Even, Odd, Space, Mark
Flow Control
Power and Environment
Power Requirements
CP-118U-I: 860 mA (+5V, RS-232)
CP-138U-I: 330 mA (+5V, RS-422)
Operating Temperature
0 to 55°C
Operating Humidity
5 to 95% RH
Storage Temperature
-20 to 85°C
ESD Protection
Embedded 15 KV ESD Protection
Optical Isolation
2 KV
Regulatory Approvals
EN55022 Class B, EN55024, EN61000-3-2, EN61000-3-3, FCC Part 15 Class B
5 years


Power Requirements
Power Consumption CP-118U: 240 mA @ +5 V (RS-232), 300 mA @ +5 V (RS-422) 
CP-138U: 135 mA @ +5V (RS-422)
Serial Communication Parameters
Flow Control RTS/CTS, XON/XOFF
Data Bits 5, 6, 7, 8
Parity None, Even, Odd, Space, Mark
Stop Bits 1, 1.5, 2
IRQ Assigned by BIOS
I/O Address Assigned by BIOS
Connector DB62 female
Bus 32-bit Universal PCI
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 1,147,210 hrs
Database Telcordia (Bellcore), GB
Physical Characteristics
Dimensions 82 x 135 mm (3.22 x 5.31 in)
Serial Interface
Serial Standards CP-118U: RS-232/422/485 
CP-138U: RS-422/485
Number of Ports 8
Max. No. of Boards per PC 4
Serial Line Protection
ESD Protection 15 KV on the board
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 B
EMS EN 55024, 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, FreeBSD 4/5, QNX 6, SCO Open Server 5/6, UnixWare 7, Solaris 10 x86/x64
Note Please refer to Moxa's website for the latest driver support information.
Warranty Period 5 years
Details See
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