US Serial I/O Modules
Serial I/O Modules for RS-232, RS-422 and RS-485
Serial I/O modules connect instruments, PLCs, GPS receivers, radios and legacy equipment that still talk RS-232, RS-422 or RS-485 to a rugged embedded computer.
The range covers 4 and 8-port boards for PC/104, PC/104-Plus and PCIe/104 hosts and 4-port PCIe MiniCards, with opto-isolated options, software-selectable protocols and latching connectors, all rated for -40 to +85 °C.
Not sure which standard your equipment uses? Read RS-232 vs RS-485.
Browse Our Range of Serial Cards
- Power: 3.3V DC [Bus]
- Temp: -40°C to 85°C [-40°F to 185°F]
- Certification: RoHS
- Serial: 2x Isolated RS232 [Board], 2x Isolated RS485 [Board]
- Serial: 4x RS232/422/485 [Board]
- Power: 3.3V DC [Bus]
- Temp: -40°C to 85°C [-40°F to 185°F]
- Certification: RoHS
-
EMM-4E-XT
EMERALD-MM-8E/EL with 4 non-isolated RS-232/422/485 ports and 8 auxiliary I/O lines -
EMM-4EL-XT
EMERALD-MM-8E/EL with 4 opto-isolated RS-232/422/485 ports and 8 auxiliary I/O lines -
EMM-8E-XT
EMERALD-MM-8E/EL with 8 non-isolated RS-232/422/485 ports and 8 auxiliary I/O lines -
EMM-8EL-XT
EMERALD-MM-8E/EL with 8 opto-isolated RS-232/422/485 ports and 8 auxiliary I/O lines
- Power: 5V DC [Bus]
- Temp: -40°C to 85°C [-40°F to 185°F]
- Serial: 4x RS232/422/485 [Board]
- Serial: 8x RS232/422/485 [Board]
- Power: 5V DC [Bus]
- Temp: -40°C to 85°C [-40°F to 185°F]
- Serial: 4x Isolated RS232/422/485 [Board]
- Power: 5V DC [Bus]
- Temp: -40°C to 85°C [-40°F to 185°F]
- Serial: 4x RS232/422/485 [Board]
- Power: 5V DC [Bus]
- Serial: 8x RS232/422/485 [Board]
- Power: 5V DC [Bus]
- Temp: -40°C to 85°C [-40°F to 185°F]
Beyond Serial: Data Acquisition and I/O Modules
Analog I/O Modules16-bit analog input and output boards
Digital I/O ModulesGPIO, opto-isolated input and relay output boards
CAN Bus I/O ModulesIsolated dual and quad CAN 2.0 modules
Ethernet I/O Modules10/100 and Gigabit network modulesData Acquisition and I/O ModulesThe full range by signal type
Power SuppliesPC/104 DC/DC supplies for the stackWhat to Specify in a Serial I/O Module
A serial I/O module adds RS-232, RS-422 or RS-485 ports to an embedded computer, for instruments, controllers and legacy equipment. Port count, isolation and form factor usually decide the choice.
Port Count
Four or eight ports per module. Count the devices, then allow one or two spare ports for later additions.
RS-232, RS-422 or RS-485
Software-selectable ports on many modules switch between standards, so one module serves mixed devices.
Optical Isolation
Opto-isolated ports protect the computer from ground loops and surges on long serial cable runs.
Form Factor
PC/104 and PCI/104-Express modules suit stacked systems, while Mini PCIe cards suit compact embedded computers.
Latching Connectors
Latching connectors on rugged modules keep serial cables in place under vehicle and machine vibration.
Temperature Range
Modules are rated from -40 to 85 °C, with selected modules tested to MIL-STD requirements.
Serial I/O Innovation & Legacy Equipment Insights
Connect Your Serial Equipment.
Tell us the devices, the serial standard and the number of ports, plus the host board. We will recommend the right serial modules, then configure and test the host computer before it ships.