Description

Description

The CP-IO22-A4-2 is a multifunction I/O expansion board for the ComfilePi system. It integrates digital I/O together with analog input and output channels in a single board, making it suitable for applications that require both on/off control and precise analog signal processing. The board mounts directly to the rear panel of the ComfilePi and uses screw terminals with indicator LEDs for easy wiring and status monitoring.

Note: This product cannot be mounted on the Cpi-C070WR-4C.

Digital Inputs

Channels: 11
Voltage range: 12 ~ 24 VDC
Absolute min/max voltage range: 3.3 ~ 28 VDC
Response time: 5 ms
Input OFF level: < 1.8 VDC
Input ON level: > 2.5 VDC
Indicator LED OFF level: < 4.5 V
Indicator LED ON level: > 5.0 V

Digital Outputs

DC output sink (NPN) × 11
Maximum output voltage: 30 VDC
Response time: 10 ms
Maximum output current: 150 mA

Analog Inputs

Channels: 4
Input voltage range: -5 VDC ~ 0 ~ 5 VDC
Resolution: 187.5 µV / bit (−26,666 ~ 0 ~ 26,666)
Sample rate: 1.62 ms

Analog Outputs

Channels: 2
Output voltage: 0 ~ 5 VDC
Resolution: 1.22 mV / bit (0 ~ 4094)
Sample rate: 12 µs
Maximum output current: 20 mA

Package Includes

CP-IO22-A4-2 I/O board
40-pin ribbon cable × 1
Mounting screws × 4

FAQ

Q: How is this different from using the GPIO pins on a standard Raspberry Pi?

A: Standard Raspberry Pi GPIO pins operate at 3.3V logic levels. That’s fine for basic digital I/O, but it stops at the logic-signal stage. In industrial environments, I/O typically works very differently. Most systems use 24V signals or dry-contact interfaces such as relays. This is necessary to interface with real-world devices—sensors, actuators, solenoid valves, motors, and other industrial equipment.

This product bridges that gap. It allows those real-world industrial devices to be safely and reliably connected to ComfilePi, translating industrial-level signals into a form the system can use. In short, it’s the difference between hobby-level GPIO and true industrial I/O designed for the real world.