Products Overview

Processor Modules

I/O Expansion Modules


Enclosures & Accessories


Custom Products

COM-based SBCs

2-in-1 SBCs

Custom Solutions


Lifecycle Extension



Industrial Automation




Support Overview

Technical Resources

Contact Technical Support

Request an RMA

About Diamond Systems

The Diamond Advantage

Markets & Applications


Career Opportunities

3.5" Form Factor
COM Express
ARM SBCs and Baseboards
Single Board Computers
I/O Modules
Power Supplies
Single Board Computers
I/O Modules
Power Supplies
I/O Modules
Single Board Computers
PCIe MiniCard
PCIe MiniCard
PCIe MiniCard
PCIe MiniCard
PCIe MiniCard
I/O Modules
Single Board Computers
I/O Modules
Small form factor
Ethernet Switch Modules
Single Board Computers
Ethernet Switches
Nano and NX Solutions
AGX Xavier Module Solutions
TX2 / TX2i Module Solutions
you are not logged in:
login | signup
lost password?

Designing Embedded Computers for Rugged Applications

Application Articles

Building Automation
Paper Processing
Train Controller
Wind Instrument
Lung Simulator
Gas Analyzer
Weapon System

Visit our Markets & Applications page.

Sign Up for our eNewsletter Today!

Products   >   I/O Expansion Modules   >   Digital I/O Modules   >   Opal-MM-1616 Opto In + Relay Out Module

Opal-MM-1616 Opto In + Relay Out Module

16 Channel Optoisolated Input & 16 Relay Output PC/104 Module

Opal-MM-1616 Opto In + Relay Out Module: I/O Expansion Modules, Wide-temperature PC/104, PC/104-<i>Plus</i>, PCIe/104 / OneBank, PCIe MiniCard, and FeaturePak modules featuring programmable bidirectional digital I/O, counter/timers, optoisolated inputs, and relay outputs., PC/104
Signal Isolation
I/O Header
Get an online quote
Customize Me


Opal-MM-1616 is a PC/104 format digital I/O module designed for industrial applications requiring isolation between the computer and the external signals it is monitoring and controlling.

The Opal-MM-1616 features 16 optoisolated digital inputs and 16 relay outputs. Each input has an input range of 0-30VDC. Opal-MM-1616 can be configured to generate an interrupt when any input changes state. Either or both banks of 8 inputs can be configured for interrupt operation. One 34-pin I/O header is used for the optoisolated inputs.
The 16 relay outputs are SPDT format (form C). Each relay has 3 contacts: Common, Normally Open, and Normally Closed. For safety and reliability, all relays are at their power-off state at power-up or system reset. Each relay can switch both AC and DC voltages. Two 26-pin I/O headers are used for the relay outputs with 8 relays on each pin header. The relays have long lifetime (10,000,000 operations) and quick actuation time (5ms max operate and release, break before make).
Diamond Systems' Universal Driver software provides drivers and example code for use with the Opal-MM-1616. The software provides support for interrupts and enables you to integrate you own code that is called when an interrupt occurs.

Signal Isolation

Opal-MM-1616 provides isolation on its input and output lines. The board will withstand up to 500V DC or AC difference in potential between the I/O lines and the rest of the board's circuitry. Each input and output channel on Opal-MM-1616 is completely independent and does not share any signal trace with any other channel. Therefore, every channel is isolated from every other channel.

I/O Header

Optoisolated Input Connector
In 0+ 1 2 In 0-
In 1+ 3 4 In 1-
In 2+ 5 6 In 2-
In 3+ 7 8 In 3-
In 4+ 9 10 In 4-
In 5+ 11 12 In 5-
In 6+ 13 14 In 6-
In 7+ 15 16 In 7-
In 8+ 17 18 In 8-
In 9+ 19 20 In 9-
In 10+ 21 22 In 10-
In 11+ 23 24 In 11-
In 12+ 25 26 In 12-
In 13+ 27 28 In 13-
In 14+ 29 30 In 14-
In 15+ 31 32 In 15-
NC 33 34 NC

Relay Output Connectors {2nd connector same as first for relays 8 - 15}
Relay 0 NO 1 2 Relay 0 C
Relay 0 NC 3 4 Relay 1 NO
Relay 1 C 5 6 Relay 1 NC
Relay 2 NO 7 8 Relay 2 C
Relay 2 NC 9 10 Relay 3 NO
Relay 3 C 11 12 Relay 3 NC
Relay 5 NO 13 14 Relay 4 C
Relay 4 NC 15 16 Relay 5 NO
Relay 5 C 17 18 Relay 5 NC
Relay 6 NO 19 20 Relay 6 C
Relay 6 NC 21 22 Relay 7 NO
Relay 7 C 23 24 Relay 7 NC
NC 25 26 NC

Block Diagram

Opal-MM-1616 Block Diagram


Optoisolated Inputs
Number of inputs 16 unidirectional optoisolated inputs
Input capacity 30VDC with current limiting resistors
Input impedance 8k ohms
Logic levels Logic 0: 0 - 1.5VDC
Logic 1: 3 - 30VDC
Programmability Programmable edge detection with interrupts
Relay Outputs
Number of outputs 16 relay outputs
Relay contacts SPDT (Form C) contacts
Break before make
Current capacity 2A
Switching capacity 30VDC at 2A
125VAC at 0.1A resistive
Maximum switching capacity 30W (DC)
Contact resistance 50mohm max
Actuation time Operate: 5ms maximum
Release: 5ms maximum
Relay lifetime 10,000,000 operations
I/O header Optoisolated inputs: 1 34-pin (2 x 17) header on .1" connector
Relay outputs: 2 26-pin (2 x 13) headers on .1" connecters
Mating Cables: C-34-18 for optoisolated inputs
C-26-18 for relay outputs (quantity 2)
Isolation (all I/O) 500VDC or AC, input to board or board to output
Channel to channel isolation
Power supply +5VDC ±10%
Current consumption 70mA typical, all relays off; additional 28mA per activated relay
Bus interface PC/104 (ISA) bus
Form factor PC/104 (3.55" x 3.775")
Operating temperature -40°C to +85°C (-40°F to +185°F)
Weight 3.4oz (96g)
Universal Driver support
RoHS Compliant
16 unidirectional optoisolated digital inputs with 0-30VDC input
16 Form C SPDT relay outputs
2A relay switching capacity
Relays can switch both DC and AC voltages
Long lifetime relays
(10,000,000 operations)
500VDC isolation between board and signals
+5VDC power input
PC/104 form factor
Supported by Diamond's Universal Driver
-40°C to +85°C operating temperature
Customers who use this product also use:
34-pin Digital I/O Cable
26-pin Digital I/O Cable

This product can be customized and ruggedized. Click here for more information.
See Opal-MM-1616 Opto In + Relay Out Module Technical Resources
Request Product information
Request Technical Support
Opal-MM-1616-XT Datasheet
(.pdf, 747.6 kb)
OPMM-1616-XT User Manual
(.pdf, 527.2 kb)

Get an online quote

Opal-MM-1616 Opto In + Relay Out Module
available models:
16 Optoisolated Input & 16 Relay Output PC/104 Module
Please login or signup for an online quote request.

Cables and accessories
available models:
Dual 26-pin connectors, 18 inches
34-conductor 18" ribbon cable
Please login or signup for an online quote request.
VDC 2006 Platinum Vendor Award