CMI8848 expands the capability of the Ethernut boards by providing 8 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 remotely monitored and controlled over a TCP/IP network. The boards are stackable, 2 CMI8848 boards are supported by a single Ethernut board.
8 optocoupler inputs are individually jumper configurable to sense dry contacts or voltages between 3.3 V and 48 V. 8 solid state relay outputs can directly drive high loads like contactors, actuators or motors. All optocouplers and relays are mounted in sockets and may be replaced by pin-compatible components.
This robust board has been in production since 2012. Our in-house quality control procedures guarantee a consistently high level of reliability.
The main characteristics of CMI8848 1.0 add-ons are:
- Inputs, outputs and mass are galvanically isolated
- Each channel can be individually configured as either input or output
- Semiconductorrelais-outputs for max. 48 V, 2.2 A
- Selectable input level from 3.3 V to 48 V
- Integrated 5 DC/DC-converter for contact inputs
- Pluggable clamping contacts for 0.14 to 0.5 mm2 cross-section
A ready-to-use webserver application allows 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.
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, which enable developers to share their experiences and to help one another in problem solving.
|CPU||AT91SAM9XE, 200 MHz clock|
|NOR Flash memory||Internal 512 kByte|
|NAND Flash memory||External 1 GByte|
|Serial Flash memory||External 4 MByte|
|Static RAM||Internal 32 kByte|
|SDRAM||External 128 MByte|
|Ethernet||RJ45 10/100BaseT (LAN8710)|
|USB||USB 2.0 device at Mini-B and host at Standard-A receptacle|
|RS-232||1 x 9-pin DCE, 8-Wire|
|Memory card||SD card / SDIO / Multimedia card socket|
|Digital I/O||15 configurable GPIO lines with alternate functions|
|Analog I/O||2 channels with external trigger and reference|
|Indicators||Power (red), link (yellow), activity (green)|
|Regulator||600 mA switcher (LT1616, LTC3407, LTC4411)|
|DC input||2.1 mm barrel connector, unregulated 5 to 24 V DC|
|USB||USB Mini-B, 5 V|
|Consumption||< 1 W at 12 V|
|Battery backup||Double layer capacitor for RTC|
|RS-232, USB||15 kV ESD protection|
|Power Supply||1 A replaceable fuse, rectifier bridge, current limiter, thermal shutdown|
|Operating temperature||-20 to 85 °C (-4 to 185 °F)|
|Storage temperature||-65 to 140 °C (-85 to 284 °F)|
|Humidity||5 to 95 % non-condensing|
|Safety||PCB flammability rating UL94-V-0|
|RoHS compliance||EU directive 2002/95/EC|
|Dimensions (L x W x H)||98 x 78 x 17 mm (3.86 x 3.07 x 0,67 in)|
|Weight||75 g (0.165 lb)|
|PCB revision||Written in copper on the PCB's backside|
|Serial number||IEEE registered MAC Address on barcode sticker label (Code 128C)|