Contec Americas Inc. / Serial
COM-4(PCI)H 4Ch RS-232C Communication Board for PCI
COM-4(PCI)H | 4-Channel RS-232C Serial I/O Board | Contec Americas Contact Sales Department for Pricing New COM-4(PCI)H 4 RS-232C Ports 921,600 bps 128-byte FIFO Standard COM Ports Up to 16 boards VCCI-A · FCC-A · CE · UKCA...
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PCI 4‑channel RS‑232C serial I/O board. Supports up to 921,600 bps with 128‑byte FIFO buffers per channel. Operates as standard Windows/Linux COM ports. Up to 16 boards can be installed in a single system.
High‑Density RS‑232C
for PCI Systems
The COM‑4(PCI)H provides four RS‑232C serial ports on a PCI board. It supports data rates up to 921,600 bps and includes 128‑byte FIFO buffers for transmit and receive per channel. The board operates as standard Windows/Linux COM ports using the included COM‑DRV driver.
- 4 RS-232C ports
- 921,600 bps max baud rate
- 128‑byte FIFO (Tx/Rx per channel)
- Asynchronous serial transfer
- RTS/CTS/DTR/DSR software control
- Standard Windows/Linux COM ports
- Up to 16 boards per system
- Optional conversion cables/units
- 37‑pin to 9‑pin/25‑pin adapters
- VCCI-A · FCC-A · CE · UKCA
Used as standard COM ports — with COM‑DRV driver, works like built‑in COM ports using Win32 API (DCB structures) or Linux system calls. Supports .NET SerialPort class and PySerial.
Built for Versatile Connectivity
- High speed — supports baud rates from 30 to 921,600 bps (depending on board revision).
- FIFO buffers — 128 bytes each for transmit and receive per channel; reduces CPU load during high‑speed communication.
- Software control — RTS, CTS, DTR, DSR lines can be controlled and monitored via software.
- High density — 4 ports on a single board; up to 16 boards per system (64 ports).
- Flexible power — supports both 3.3V and 5V PCI slots via jumper selection (depending on board revision).
Full Specifications
| Item | Specification |
|---|---|
| Model | COM‑4(PCI)H |
| Number of channels | 4 |
| Interface type | RS‑232C |
| Transfer method | Asynchronous serial transfer |
| Baud rate | 30 – 921,600 bps *1*3 (varies by board revision) |
| Data length | 5, 6, 7, 8 bits |
| Stop bits | 1, 1.5, 2 bits |
| Parity check | Even, Odd, Non‑parity |
| Controller chip | 162850 or equivalent (128‑byte FIFO per channel) |
| Connecting distance | 15 m (Typ.) |
| Interrupt requests | 1 level used |
| I/O address | Any 32‑byte boundary |
| Power consumption | 3.3V 210mA or 5V 210mA (jumper selectable, depending on board) |
| Bus interface | 32‑bit, 33 MHz PCI (Universal key, depending on board) |
| Connector | 37‑pin (on‑board) / optional conversion cables |
| Dimensions (L × H) | 121.69 × 105.68 mm (varies by board number) |
| Weight | 130 g |
| Operating temperature | 0‑50°C |
| Operating humidity | 10‑90% RH (no condensation) |
| Certifications | VCCI Class A, CE (EMC Class A, RoHS), UKCA |
Connector & Cabling
The board uses a 37‑pin on‑board connector. Optional conversion cables are available to split into four 9‑pin D‑SUB (PCE37/9PS) or four 25‑pin D‑SUB (PCE37/25PS) male connectors. A DIN‑rail mountable conversion unit (CCU‑78F/25M) is also available.
- Optional conversion cables — PCE37/9PS (37‑pin to 9‑pin D‑SUB ×4), PCE37/25PS (37‑pin to 25‑pin D‑SUB ×4).
- Optional conversion unit — CCU‑78F/25M (DIN‑rail or wall mount, 78‑pin to 25‑pin D‑SUB ×8).
- Signal lines — TD, RD, RTS, CTS, DTR, DSR, DCD, SG, RI.
- Cable types — use straight cable for modem connection, crossed (null modem) for PC‑to‑PC connection.
Certifications & Compliance
- VCCI Class A — Japanese EMC for commercial/industrial environments.
- FCC Class A — U.S. emissions compliance for industrial use.
- CE (EMC Directive Class A + RoHS) — European conformity.
- UKCA — UK conformity assessed.
Optional Accessories
| Part Number | Description |
|---|---|
| PCE37/9PS | Conversion cable, 37‑pin to 9‑pin D‑SUB ×4 (250mm) |
| PCE37/25PS | Conversion cable, 37‑pin to 25‑pin D‑SUB ×4 (250mm) |
| CCU‑78F/25M | Conversion unit, 78‑pin to 25‑pin D‑SUB ×8 (requires RS‑78M/37M cable) |
| RS‑78M/37M | Optional cable for CCU‑78F/25M (2m) |
Software & Packing List
| Item | Description |
|---|---|
| Windows driver | COM‑DRV(WDM) – standard COM port emulation; supports DCB, .NET SerialPort, PySerial; sample programs in C#, VB.NET, VC++, Python |
| Linux driver | COM‑DRV(LNX) – standard TTY driver; supports PySerial; gcc (C/C++) and Python samples |
| Packing List | Product ×1, "Please read the following" document |
Ready to add RS‑232C serial ports?
The COM‑4(PCI)H is available through Contec Americas on a quote basis. Contact our sales team for volume pricing, cable assemblies, and integration support.
Taxes and shipping calculated at checkout.
Lead times may vary for products shipped from Japan:
Products sourced from Japan may take between 4 to 5 weeks to arrive. We will provide updated shipping timelines upon order confirmation.
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