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Things Embedded are an official Diamond Systems USA distributor and can supply the JANUS-MM-LP.




Diamond Systems


The Janus-MM-4LP-XT family of I/O modules offers two or four opto-isolated CANbus 2.0B ports plus 16 digital I/O lines. Models are available in both the PC/104-Plus and PC/104 form factors. An FGPA core houses the CAN controller logic and digital I/O logic providing data rates up to 1Mbps. Each CAN port supports standard and extended frames as well as expanded TX and RX message queues for enhanced performance. Each port has its own combination isolator and transceiver chip.

Janus-MM-4LP-XT fits a wide variety of rugged and on-vehicle embedded serial I/O application needs. It was designed with harsh applications in mind including latching connectors to further improve reliability. Extended temperature operation of -40°C to +85°C is tested and guaranteed. The module is compatible with MIL-STD-202G shock and vibration specifications.

I/O Cables

Diamond Systems offers cables for use with the Janus-MM-4LP-XT family of PC/104-Plus CANbus modules.


Brand & Model Diamond Systems JANUS-MM-LP : JNMM-2L-XT
2 Port Isolated CAN Bus PC/104 Module with 16-Channels Digital I/O
Features Compact
CAN Circuit
Number of CAN ports 2 or 4 CANbus 2.0B
Data rates Up to 1Mbps
Controller FPGA based
Transceiver ADM3053 isolation + transceiver
Isolation 500V port-to-port and port-to-host
Frames Standard 11-bit identifier
Extended 29-bit identifier
Message queues Expanded TX and RX message queues
16 8-byte transmit message queues
31 8-byte receive message queues
Receive filters 16
Termination Jumper selectable biased split termination
Digital I/O
Number of lines 16 programmable DIO lines arranged in 2 8-bit ports
Logic levels 3.3V or 5V, jumper selectable
Pull-up/pull-down Jumper selectable
Direction control Software programmable
Host interface PCI or ISA, self selecting
Connectors Latching connectors for increased ruggedness
Input power +5VDC ±5%
Power consumption tbd W at 5VDC
Operating System support Windows Embedded Standard 7
Linux Ubuntu 12.04LTS
Operating temperature -40ºC to +85°C (-40ºF to +185°F)
Operating humidity 5% to 95% non-condensing
Shock MIL-STD-202G compatible
Vibraion MIL-STD-202G compatible
MTBF tbd hours at 20°C
Form Factor PC/104-Plus:
3.55″ x 3.775″ (90mm x 96mm)
Weight 2.5oz (71g)
RoHS Compliant

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