Industrial Serial Cards and Adaptors for System Expansion

Expand your system’s connectivity with our wide range of industrial serial cards and adaptors. Available in single and multi-port configurations, these boards support popular bus interfaces including PCI, PCI Express, PC/104, and Mini PCIe, making them ideal for both legacy integration and modern embedded applications.

If you're adding RS-232, RS-422, or RS-485 ports to a workstation or embedded PC, our serial cards offer reliable, high-performance communication in demanding environments.

Not sure which interface you need? Our technical specialists are here to help.

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Serial Cards & Adaptors

Showing 60 of 110 Serial Cards & Adaptors items

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DB116-ROHS
Sealevel DB116-ROHS
DB9 Male to RJ45 - Preconfigured for 4161/4163 (RS-232)
DB113-ROHS
Sealevel DB113-ROHS
DB9 Male to DB9 Female Low Profile Null Modem Adapter
DB112-ROHS
Sealevel DB112-ROHS
DB9 Female to RJ45 - Preconfigured for 7107 (RS-485)
DB111-ROHS
Sealevel DB111-ROHS
DB9 Female to RJ45 Modular Adapter (RS-485 Pinout) for SeaI/O Modules
DB109-ROHS
Sealevel DB109-ROHS
DB9 Female to RJ45 Modular Adapter (RS-232 Pinout) for SeaI/O Modules
DB104-ROHS
Sealevel DB104-ROHS
DB25 Female (RS-422) to DB9 Female (Opto 22 Optomux) Converter
DB103-ROHS
Sealevel DB103-ROHS
DB9 Female (RS-422) to DB9 Female (Opto 22 Optomux) Converter
OPT 8B+
Moxa OPT 8B+
VHDCI 68 to 8x DB25(M) Connection Box
OPT8-RJ45
Moxa OPT8-RJ45
DB62(M) to 8 X RJ45 (8-Pin) Connection Box
OPT8-M9+
Moxa OPT8-M9+
VHDCI 68 to 8x DB9(M) Connection Box
OPT8-M9
Moxa OPT8-M9
DB62(M) to 8x DB9(M) Connection Box
OPT 8S
Moxa OPT 8S
DB62(M) to 8x DB25(F) Connection Box: Surge Protection
OPT 8B
Moxa OPT 8B
DB62(M) to 8x DB25(M) Connection Box
OPT 8A
Moxa OPT 8A
DB62(M) to 8x DB25(F) Connection Box
NP21103
Moxa NP21103
DB25 Terminal Block Kit for RS-422/485
CP-102U
Moxa CP-102U
2 Port RS-232 Universal PCI Serial Card, 0°C to +55°C
£54.00
CP-102UL
Moxa CP-102UL
2 Port RS-232 Low Profile Universal PCI Serial Card
£60.50
CA-104
Moxa CA-104
4 Port RS-232 PC/104 Module, 0°C to +55°C
£108.00
CA-108
Moxa CA-108
8 Port RS-232 PC/104 Module, 0°C to +55°C
£179.50
CA-114
Moxa CA-114
4 Port RS-232/422/485 PC/104 Module, 0°C to +55°C
£179.50
CB-134I
Moxa CB-134I
4 Port RS-422/485 Isolated PC/104+ Module, 0°C to +55°C
£430.00
CP-102EL
Moxa CP-102EL
2 Port RS-232 Low Profile PCI Express Serial Card
£94.00
CP-102N
Moxa CP-102N
2 Port RS-232 Mini PCI Express Serial Card
£121.00
CA-132/132I
Moxa CA-132/132I
2 Port RS-422/485 PC/104 Module
£120.50
CA-134I
Moxa CA-134I
4 Port RS-422/485 Isolated PC/104 Module, 0°C to +55°C
£326.00
CP-114EL
4 in stock
Moxa CP-114EL
4 Port RS-232/422/485 Low Profile PCI Express Serial Card
£195.50
CP-114EL-I
Moxa CP-114EL-I
4 Port Isolated RS-232/422/485 Low Profile PCI Express Serial Card
£393.50
CP-104JU
Moxa CP-104JU
4 Port RS-232 Low Profile Universal PCI Serial Card: RJ45 Ports, 0°C to +55°C
£114.00
CP-104UL
Moxa CP-104UL
4 Port RS-232 Low Profile Universal PCI Serial Card
£101.00
CB-108
Moxa CB-108
8 Port RS-232 PC/104+ Module, 0°C to +55°C
£242.50
CB-114
Moxa CB-114
4 Port RS-232/422/485 PC/104+ Module, 0°C to +55°C
£262.00
CP-112UL
Moxa CP-112UL
2 Port RS-232/422/485 Low Profile Universal PCI Serial Card
£114.50
CP-112UL-I
Moxa CP-112UL-I
2 Port Isolated RS-232/422/485 Low Profile Universal PCI Serial Card
£201.00
POS-104UL
Moxa POS-104UL
4 Port RS-232 Low Profile PCI Serial Card – Power Over Serial
£112.00
UIO-4030
Advantech UIO-4030
UIO40-Express I/O Expansion Card – 1x RS-485 – 1x RS-232 – 4x DI & 4x DO
£42.00
CP-134EL-A-I
Moxa CP-134EL-A-I
4 Port RS-232/422/485 Isolated PCI Express Serial Card – 4kV Surge Protection
£384.00
CP-134U
Moxa CP-134U
4 Port RS-422/485 Universal PCI Serial Card – 15kV ESD Protection
£181.00
CP-134U-I
Moxa CP-134U-I
4 Port Isolated RS-422/485 Universal PCI Serial Card – 15kV ESD Protection
£417.00
CP-132EL
Moxa CP-132EL
2 Port RS-422/485 Low Profile PCI Express Serial Card – DB9M cable
£115.00
CP-132UL
Moxa CP-132UL
2 Port RS-422/485 Low Profile Universal PCI Serial Card
£91.00
CP-132UL-I
Moxa CP-132UL-I
2 Port Isolated RS-422/485 Low Profile Universal PCI Serial Card
£202.00
CP-114UL
Moxa CP-114UL
4 Port RS-232/422/485 Low Profile Universal PCI Serial Card
£186.50
CP-114UL-I
Moxa CP-114UL-I
4 Port Isolated RS-232/422/485 Low Profile Universal PCI Serial Card, 0°C to +55°C
£413.50
CP-138E-A-I
Moxa CP-138E-A-I
8 Port Isolated RS-422/485 PCI Express Serial Card – 4kV Surge Protection
£696.50
CP-138U
Moxa CP-138U
8 Port RS-422/485 Universal PCI Serial Card, 0°C to +55°C
£304.50
CP-138U-I
Moxa CP-138U-I
8 Port Isolated RS-422/485 Universal PCI Serial Card, 0°C to +55°C
£585.50
CP-116E-A
Moxa CP-116E-A
16 Port RS-232/422/485 PCI Express Serial Card – 4kV Surge Protection
£736.00
CP-168EL-A
Moxa CP-168EL-A
8 Port RS-232 PCI Express Serial Card
£204.00
CP-168U
3 in stock
Moxa CP-168U
8 Port RS-232 Universal PCI Serial Card, 0°C to +55°C
£149.50
CP-118U-I
Moxa CP-118U-I
8 Port Isolated RS-232/422/485 Universal PCI Serial Card, 0°C to +55°C
£745.50
3588
Sealevel 3588
8 Port RS-485 PC/104 Serial Card
5102
Sealevel 5102
1 Port RS-232/422/485/530/530A/V.35 Low Profile PCI Synchronous Serial Card
5102e
Sealevel 5102e
1 Port RS-232/422/485/530/530A/V.35 Low Profile PCI Express Synchronous Serial Card
£534.00
3512
Sealevel 3512
1 Port RS-232/422/485/530/530A/V.35 PC/104 Synchronous Serial Card
3514
Sealevel 3514
1 Port RS-232/422/485/530/530A/V.35 PC/104+ Synchronous Serial Card
3540
Sealevel 3540
4 Port RS-232/422/485 PC/104 Serial Card
3541-KT
Sealevel 3541-KT
4 Port RS-232/422/485 PC/104 Serial Card Kit (C4.104-ULTRA Kit)
7204e
Sealevel 7204e
2 Port RS-422/485 Low Profile PCI Express Asynchronous Serial Card
7205
Sealevel 7205
2 Port RS-232/422/485 Low Profile PCI Serial Card
£674.50
7205ec
Sealevel 7205ec
2 Port RS-232/422/485 Low Profile PCI Express Asynchronous Serial Card
£253.00
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Showing 60 of 110

Why Use Serial Cards in Modern Systems?
Many new PCs and servers no longer include native serial ports. Expansion cards restore this capability, allowing engineers to continue using equipment that depends on RS-232, RS-422 or RS-485 connections.

How Do Adaptors Add Flexibility?
Adaptors provide quick conversion between different serial standards or between USB and serial. This makes it simple to connect a variety of legacy devices without needing to reconfigure or replace existing hardware.

What Benefits Do Industrial Models Offer?
Compared to office-grade products, industrial cards and adaptors feature stronger isolation, extended temperature support and reinforced components. These features ensure long service life in demanding environments such as manufacturing and utilities.