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PC/104-Plus Quad Isolated CAN Module with 24 Digital I/O
  • Details
  • Specification
  • Order information
  • 2 or 4 CAN 2.0B ports
  • Data rates up to 1Mbps
  • 24 digital I/O lines
  • Extremely rugged -40°C to +85°C operating temperature
High Performance CAN Functionality

The Janus-MM-4LP-XT I/O module offers two or four CANbus 2.0B ports with opto-isolation plus 24 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 provides data rates up to 1Mbps. Each 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. The Janus-MM-4LP-XT fits a wide variety of rugged and on-vehicle embedded serial I/O application needs.

Digital I/O

Janus-MM-4LP-XT offers 24 programmable digital I/O lines organized as three 8-bit digital I/O ports.

Rugged Design

Janus-MM-4LP-XT 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.

Key Features

All four CAN ports on the Janus-MM-4LP-XT are driven from an FPGA-based CAN 2.0 bus controller core which provides full CAN2.0B functionality. Each port has an Analog Devices combination isolation and transceiver chip, independently isolating it from the host system and other ports to eliminate sensitivity to noise and ground shifts in the network.

The product has several jumper configurable options including CAN termination and bias. The digital I/O logic level and pull-up / pull-down resistors are also jumper configurable.

For additional ruggedization, zero ohm jumper-bypass resistors can be installed in any configuration.

Software Support

Janus-MM-4LP-XT comes with a basic CAN driver for Windows 7, XP and Linux 2.6. The driver supports dual-independent and dual-redundant modes.

Technical specifications
Number of CAN ports4 CANbus 2.0B
Data ratesUp to 1Mbps
ControllerFPGA based
TransceiverADM3053 isolation + transceiver
Isolation500V port-to-port and port-to-host
FramesStandard 11-bit identifier
Extended 29-bit identifier
Message queuesExpanded TX and RX message queues
TerminationJumper selectable
BiasJumper selectable
Digital I/O24 programmable digital I/O lines arranged in 3 8-bit ports
Logic levels3.3V or 5V, jumper selectable
Pull-up/pull-downJumper selectable
Direction controlSoftware programmable
Host interfacePCI or ISA, self selecting
ConnectorsLatching connectors for increased ruggedness
Input power+5VDC +/-5%
OS supportWindows Embedded Standard 7and XP
Linux 2.6.16, 2.6.31 and 2.6.32
Form factorPC/104-Plus 3.55” x 3.775” (90mm x 96mm)
Weight2.5oz (71g)
Environmental and physical specifications
Operating Temperature-40°C to +85°C (-40°F to +185°F)
Operating Humidity5% to 95% non-condensing
ShockMIL-STD-202G compatible
VibrationMIL-STD-202G compatible
Model Description
JNMM‑4LP‑XT Quad isolated CAN port PC/104-Plus Module with 24 Digital I/O
JNMM‑2LP‑XT Dual isolated CAN port PC/104-Plus Module with 24 Digital I/O (available as MOQ only)
JNMM-4L-XT Quad isolated CAN port PC/104 Module with 24 Digital I/O
JNMM‑2L‑XT Dual isolated CAN port PC/104 Module with 24 Digital I/O (available as MOQ only)
CK‑JNMM4LP Cable Kit,Janus-MM-4LP
CK‑JNMM2LP Cable Kit, Janus-MM-2LP Dual Port CAN PC/104 Module
6981164 IDC20FxIDC20F, 2mm, 12" Digital I/O cable
6981182 CANbus 2.0 cable
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