M.2 8-ch Isolated Digital Inputs with Change-of-State (COS) Detection and Solid State FET Relay Outputs

  • Description
  • Specifications
  • Ordering Guide

The M.2-IDIO-8 is 2260/2280 sized M.2 Card designed to be easily panel-mounted in any application environment. It uses the high speed PCI Express bus to transfer digital data to and from the card. The digital I/O is compatible with 8255 PPI chips making it easy to program.

The M.2-IDIO cards are well suited to complex environments, mitigating otherwise challenging ground-loops, high-common-mode, and transient voltage spikes common in electrically-noisy industrial or factory locations. The broad voltage compatibility and high current outputs allows use in a wide range of applications.

The non-polarized inputs support both AC and DC, and configuration jumpers allow 4.7ms input filters to be enabled per-channel, as desired – required for AC use. The isolated inputs support voltages from 3 to 31 VDC/VAC RMS [40Hz to 10000Hz], as well as standard 12/24 AC control transformer signals.

The outputs are fully protected High-Side Power MOSFETs capable of switching from 5 to 34VDC at up to 2A continuous-current load with 10A max current allowed (VBB0 = 5A, VBB1 = 5A).

Change of State (COS) detection and interrupt capabilities are designed to relieve software from polling routines that can consume valuable processing time. Each port can be programmed for detecting state changes on their lines, in which any changes of the enabled port’s bits (low-to-high or high-to-low) will generate an IRQ. An ISR (interrupt service routine) then determines which bit changed state and clears the interrupt.

Interface M.2 2260/2280 with B & M key
Number of Isolated Inputs 8 or 4
Type Non-polarized
Optically isolated from each other and from the computer (CMOS compatible)
Voltage 3 to 31 DC or AC RMS (40 to 10000Hz)
Isolation 500V channel-to-ground and channel-to-channel
Resistance 1.8KΩ in series with opto-coupler
Filter Response Rise-time: 4.7 ms
Fall-time: 4.7 ms
Non-Filter Response Rise-time: 10 μs
Fall-time: 30 μs
FET Outputs & DIOs 8 or 4
Type High Side Power MOSFET Switch
Protected against short-circuit, over-temp, ESD; drives inductive loads.
Current Rating 2A maximum
Turn On time 90μsec (typical)
Turn Off time 110μsec (typical)
Digital Inputs (8 or 4 LVTTL) Logic High: 2.0V to VCCIO (3.3VDC, 5VDC tolerant)
Logic Low 0V to 0.8V
Digital Outputs (8 or 4 LVTTL) Logic High: 2.0V (min) 24mA source
Logic Low: 0.55V (max) 24mA sink
Power Required +3.3VDC @ 360ma (typical)
Operating temperature 0°C to 70degC (standard)
-40ºC to +85ºC (Add -T)
Operating humidity 5% to 95% noncondensing
Weight 6.2g


Model Description
M.2-IDIO-8 M.2 8-ch Isolated Digital Input & FET Relay Output with Change-of-State (COS)
M.2-IDIO-4 M.2 4  4-ch Isolated Digital Input & FET Relay Output with Change-of-State (COS)
M.2-IDO-8 M.2  8-ch FET Relay Outputs only
Option: -T -40ºC to +85ºC