Industrial I/O Control PCIe Card
with 4-port RS-232/422/485
8+8-ch Isolated Digital I/O
Main features
Board Level:
- Designed to meet PCI Express Base Specification Revision 2.1.
- With high reliable SUNIX QiuNiu UART Digital-I/O controller.
- Plug-n-Play, I/O address and IRQ assigned by system.
- Ultra low power consumption ( <1.5W) design for green environment and industrial application.
- High quality electronic components, low impedance and high stability ensure product quality and reliability.
- Support Microsoft Windows 10 with C and C# programming language sample code.
- Capable of engaging with EdgeX device C SDK for EdgeX service development.
- Support Node-RED serial and Modbus communication module.
- Certified by CE, FCC, RoHS, and Microsoft approvals.
- Support both standard and Low profile bracket design to meet various of PC chassis.
Serial Communication:
- Expands internal two (2) ports RS-232/422/485 and external two (2) ports RS-232/422/485.
- Utilize 16C950 UART and on-chip 128-bytes hardware FIFO for reliable, high-speed serial communication.
- RS-232/422/485 interface and 120Ω terminal resistor configured by software.
- On-chip patented AHDC/CS hardware auto flow control to guarantee no data loss.
- 2KV surge protection for all serial signals meets IEC-61000-4-5.
Digital I/O Communication:
- Expands isolated eight (8) digital input channels with features for all channels.
- Support both NPN & PNP devices
- Support both dry and wet contact connections
- With digital filter for noise reduction
- Built-in 32-bit counter for all digital in channels
- Expands isolated eight (8) NPN type digital output channels with initial value (Booting & Restart) protection.
- Each channel built-in 2.5KV isolation protection for signal and power, allowing the input signals to be completely floated so as to prevent ground loops.
Overview
SUNIX SDC4880B, industrial RS-232/422/485 and isolated digital I/O PCI-Express add-on card, is designed for PC-based IoT Gateway or desktop that enables data acquisition, I/O controls and serial communication in industrial automation. This board built-in SUNIX UART & Digital-I/O controller, QiuNiu, and also built with many of SUNIX advanced features and technologies. In addition, SUNIX provides API software and SDK library, allowing users to program under Windows 10 operating systems. The software package includes a dynamic library.dll, C and C# programming language sample code, making it easier to develop application software. SUNIX SDC4880B board enriches I/O expandable capacity with cost-efficient design; it is the best serial and digital I/O communicating solution for lite-industrial applications.

Specifications
Board Communication
Interface | PCI Express |
Controller | SUNIX QiuNiu UART Digital-I/O Controller |
BUS | PCI Express Gen1 x 1 (single lane) |
IRQ & IO | Assigned by System |
ESD Protection | ±15KV IEC61000-4-2 Air Gap Discharge ±8KV IEC61000-4-2 Contact Discharge |
Serial Communication
Interface | RS-232/422/485 |
No. of Port | 4-port |
Controller | 16C950 UART Compatible |
Data bit | 5, 6, 7, 8 |
FIFO | 128byte Hardware |
Parity | even, odd, none, mark, space |
Baud Rate | 50bps ~921.6Kbps |
Flow Control | RS-232: CTS/RTS (hardware), DTR/DSR (hardware), Xon/Xoff (software) RS-422/485: Xon/Xoff (software) |
Terminator | 120Ω |
IRQ & IO | Assigned by System |
Surge Protection | 2KV Surge (Meets IEC61000-4-5 requirement) |
Signal | RS-232: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND, RI RS-422: TxD+, TxD-, RxD+, RxD-, GND RS-485: Data+, Data-, GND |
PCB Connector | 2 ports on DB44 Female connector ; 2 ports on pitch 1.0 pin header connectors |
Digital Input Communication
Type | NPN & PNP |
Channel | 8-channel |
Dry Contact | Logic Level 0: Open; Logic Level 1: Close to GND |
Wet Contact | Logic Level 0: 0 to 3VDC; Logic Level 1: 10 to 50VDC |
Input Resistance | 10KΩ |
Isolation | 2500 VDC |
Frequency | Input Range 2KHz with Isolation |
Pin Define | DI1~DI8, COM, GND |
Counter | 32-bit counter for all channel |
Interrupt Mode | Event trigger (Rising Edge, Falling Edge, Both modes) & polling for all channels |
Noise Reduction | Digital Filter |
PCB Connector | DB44 Female Connector |
Digital Output Communication
Type | NPN |
Channel | 8-channel |
Voltage Range | 3.5 to 40VDC |
Current | 500mA per Channel |
Isolation | 2500 VDC |
Pin Define | DO1~DO8, PWR, GND |
Initial Protection | Initial Value Setup (Booting & Restart protection) |
PCB Connector | DB44 Female Connector |
Software Support
Microsoft | Windows 10 (X86/X64) |
SDK | Library: DLL for Windows supporting C, C++, C# languages. Support C, C# sample code available |
Third Party Software | Support Node-RED serial and Modbus communication module. Capable of engaging with EdgeX device C SDK for EdgeX service development. |
Regulatory Approvals
Hardware | CE / FCC / VCCI / BSMI |
Declaration
Environment
Operation Temperature | -20 to 70°C (-4 to 158°F) |
Operation Humidity | 5 to 95% (non-condensing) |
Storage Temperature | -20 to 70°C (-4 to 158°F) |
Dimension
PCB Dimension | 146 x 68.5 mm |
Bracket | Standard 121 mm / Low Profile 79.2mm |
Bracket Space | 1 |