TPMC861 4 Channel Serial Controller with Insulated RS422/485 Interfaces

Four channels of high performance RS422/485 HD/FD serial interface. All four channels of the TEWS Technologies TPMC861 are insulated from the system and against each other by optocouplers and DC/DC converters.

The serial channels are accessible through a DB25 connector mounted in the front panel and via P14. Each channel has a 128 byte transmit FIFO and a 128 byte receive FIFO. The FIFO trigger thresholds are programmable.

All channels generate interrupts on PCI interrupt INTA. For fast interrupt source detection the TPMC861 provides a special interrupt status register. Each input and output of all channels is protected against electrostatic discharge up to 15 kV.

A wide range of drivers is available: Linux, Integrity, QNX, VxWorks and Windows. All drivers - except the Windows drivers - are supplied as C source code.


Technical Description

  • PMC module, 32-bit/33MHz PCI interface, IEEE P1386.1 compliant, PCI 2.2 compliant, 3.3/5V Vio
  • 4 port EIA-422/485 controller
  • Interface per channel selectable via DIP switch
  • Front panel I/O via DB25 connector and P14 I/O
  • Channels independently insulated with DC/DC converters for each channel
  • 128 byte FIFOs per receive/transmit channel
  • Baud rates up to 460.8 KBd
  • 15 KV ESD protected acc. to IEC 1000-4-2
  • -40°C .. 85°C operating temperature range
  • Linux, Integrity, QNX, VxWorks, and Windows drivers are available
  • 5 years warranty

Order Information


4 port EIA-422/-485 controller, optical insulation, front and P14 I/O


PIM I/O module with HD50 SCSI-2 type connector


1.8m cable with DB-25 connectors


25 pin terminal block with DB-25 connector


Connection kit, 1.8m cable with DB-25 connectors and 25 pin terminal block


Integrity driver


VxWorks driver


Windows driver


LINUX driver


QNX 6 driver

Technical Documentation

TPMC861 data sheet

TPMC861 user manual

TPIM001 data sheet

TPIM001 user manual

VxWorks driver user manual

Windows driver user manual

LINUX driver user manual

QNX 6 driver user manual