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Ethernut I/O Expansion Board: 8 Isolated I/O, Solid-State Relays US$102.00

EGN110312
Ethernut I/O Expansion Board: 8 Isolated I/O, Solid-State Relays


The CMI8848 expands the capability of Ethernut 1, Ethernut 2, Ethernut 3 and Ethernut 5 boards by providing eight galvanically isolated digital I/O channels, available at pluggable spring-cage terminal blocks. In combination with an Ethernut board, AC and DC loads and states can be monitored and controlled remotely over a TCP/IP network. The boards are stackable; two CMI8848 boards can be supported by a single Ethernut board, giving you 16 I/O.

Eight optocoupler inputs can be configured individually via jumpers to sense dry contacts or voltages between 3.3V and 48V. Eight solid-state relay outputs can drive high loads direcly, e.g. contactors, actuators or motors. All optocouplers and relays are mounted in sockets and may be replaced by pin-compatible components.

The board ships with two 8-pin 2.5mm terminal plugs, one 2-pin 2.5mm terminal plug, four M3 16mm spacers, eight M3 6mm screws, and 30 jumpers.

Ethernut I/O and Relay Add-on Board Features

  • Inputs, outputs and ground are galvanically isolated
  • Stackable for up to 16 I/O channels (eight per board)
  • Each channel can be configured individually as either input or output
  • Solid-state relay outputs for max. 48V @ 2.2A
  • Selectable input level from 3.3V to 48V
  • Integrated 5V DC/DC converter for contact inputs
  • Pluggable terminal contacts for 0.14 to 0.5 mm cross-section

Software

A ready-to-use webserver application allows you to control and monitor I/Os with a web browser. In addition, well documented C source code samples are available for all Ethernut boards to help you with your own projects.

Support

Several companies with many years of experience in Nut/OS software and Ethernut hardware offer commercial support. Furthermore, mailing lists are an important element of this Open Source project, where developers use each other's experience to help solving respective problems.

License

The entire source code for the target system, as well as the hardware design, has a permission-free BSD License and can be used in commercial products for any purpose without license fees. In contrast to some other Open Source license models, it does not require you to publish your own source code enhancements.

Specifications

Digital I/O
Channels 8; individually configurable as input and/or output
Connectors Phoenix 1881480
Wire size Min. 0.14mm (AWG 26); Max. 0.5mm (AWG 20); solid or stranded wire
Digital inputs
Voltage 3.3V to 48V, non-polar
Current 0.8mA to 8.7mA
Isolation 3750 VRMS
Bandwidth 165 Hz
Digital outputs
Voltage 48V max.
Current 2.2A max.
Latency @ 3.3V 350s on; 113s off
Latency @ 5V 200s on; 115s off
Power supply
Voltage 3.3V or 5V
Max. Consumption @ 3.3V   89mA
Max. Consumption @ 5V 205mA
Environmental
Operating temperature -40 to +85 C (-40 to 185 F)
Storage temperature -65 to +140 C (-85 to +284 F)
Humidity 5% to 95% non-condensing
Approvals
Safety PCB inflammability rating UL94-V-0
RoHS compliance EU directive 2002/95/EC
Metrics
Dimensions (L W H) 98 78 26 mm (3.86 3.07 1.02 in)
Weight 60 g (0.13 lb)
Product identification
PCB revision Written in copper on the PCB's backside
Serial number Barcode sticker label

CMI8848 Resources


This product was added to our catalog on Tuesday 07 October, 2014.

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