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
CA-104
Moxa CA-104
4 Port RS-232 PC/104 Module, 0°C to +55°C
£108.00
CP-102EL
Moxa CP-102EL
2 Port RS-232 Low Profile PCI Express Serial Card
£94.00
CP-104UL
Moxa CP-104UL
4 Port RS-232 Low Profile Universal PCI Serial Card
£101.00
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
7402e
Sealevel 7402e
4 Port RS-422/485 Low Profile PCI Express Asynchronous Serial Card
7406e
Sealevel 7406e
4 Port RS-232 Low Profile PCI Express Asynchronous Serial Card
7406
Sealevel 7406
4 Port RS-232 Low Profile PCI Serial Card
£481.50
7802ec
Sealevel 7802ec
8 Port RS-422/485 Low Profile PCI Express Asynchronous Serial Card
£415.50
5402e
Sealevel 5402e
4 Port RS-232/422/485/530/530A/V.35 PCI Express Synchronous Serial Card
£1,473.00
7104
Sealevel 7104
1 Port RS-232 Low Profile PCI Serial Card
£445.00
7106
Sealevel 7106
1 Port RS-232/422/485/530 Low Profile PCI Serial Card
£437.00
5103
Sealevel 5103
1 Port RS-232 Low Profile PCI Synchronous Serial Card
5103e
Sealevel 5103e
1 Port RS-232 Low Profile PCI Express Synchronous Serial Card
£453.50
5104
Sealevel 5104
1 Port RS-232/422/485/530/530A/V.35 Low Profile PCI Synchronous Serial Card
7201
Sealevel 7201
2 Port RS-232/422/485 PCI Serial Card
7202
Sealevel 7202
2 Port RS-232 PCI Serial Card
7203e
Sealevel 7203e
2 Port RS-232/422/485 Isolated PCI Express Asynchronous Serial Card
£205.00
7106e
Sealevel 7106e
1 Port RS-232/422/485/530 Low Profile PCI Express Asynchronous Serial Card
£229.00
7108
1 in stock
Sealevel 7108
1 Port RS-232/422/485 Isolated Low Profile PCI Serial Card
£636.00
5104e
Sealevel 5104e
1 Port RS-232/422/485/530/530A/V.35 Low Profile PCI Express Synchronous Serial Card
£584.50
5402
Sealevel 5402
4 Port RS-232/422/485/530/530/V.35 Synchronous Serial PCI Card
£1,161.50
7161
Sealevel 7161
16 Port RS-232 PCI Serial Card
7161e
Sealevel 7161e
16 Port RS-232 PCI Express Asynchronous Serial Card
7204
Sealevel 7204
2 Port RS-422/485 PCI Serial Card
7803
Sealevel 7803
8 Port RS-232 Low Profile PCI Serial Card
7804
Sealevel 7804
8 Port RS-232/422/485 PCI Serial Card
MIC-3955
Advantech MIC-3955
4 Port RS-232/422/485 3U Compactpci Serial Card
£413.50
7404e
Sealevel 7404e
4 Port RS-232/422/485 PCI Express Asynchronous Serial Card
PCI-1610C
Advantech PCI-1610C
4 Port RS-232 PCI Serial Card – Surge – Isolation Protection
7804e
Sealevel 7804e
8 Port RS-232/422/485 PCI Express Asynchronous Serial Card
UIO-4030
Advantech UIO-4030
UIO40-Express I/O Expansion Card – 1x RS-485 – 1x RS-232 – 4x DI & 4x DO
£45.00
PCI-1602C
Advantech PCI-1602C
2 Port RS-232/422/485 PCI Serial Card – Surge – Isolation Protection
£150.50
PCI-1610B
Advantech PCI-1610B
4 Port RS-232 PCI Serial Card – Surge Protection
£104.00
PCI-1604C
Advantech PCI-1604C
2 Port RS-232 PCI Serial Card
£183.50
PCI-1612C
Advantech PCI-1612C
4 Port RS-232/422/485 PCI Serial Card – Surge – Isolation Protection
£363.50
PCI-1622B
Advantech PCI-1622B
8 Port RS-232/422/485 PCI Serial Card – Surge Protection
£218.50
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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.