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CAN Bus to CAN Bus Gateway

CG-ARM7

The rail mountable CAN Bus to CAN Bus gateway, the CG-ARM7, transmits CAN signals between CAN Bus subsystems. The CG-ARM7 allows a flexible design of the wiring topology. Star and tree structures as well as extensive line structures can be realized. Among the available functions are data rate adaption, message filtering as well as identifier conversion between the coupled busses.

The restriction of the maximum data rate depending on cable length for single CAN segments can be abolished for the over-all system by use of CG-ARM7. CG-ARM7 obtains its potential through the use of a 32 bit microcontroller with 48MHz clock.

High speed processing and low latencies allow the use with high data rates and bus loads. Cost efficient series applications are particularly promoted by use of CG-ARM7.

The configuration of the device functions can take place either through CAN or through the built-in RS232 interface. Download software for the configuration is available for Windows PCs as well as Linux PCs. CG-ARM7 is available in version HS/LS allowing the conversion of high speed to low speed CAN.

Key Features

  • Connection of CAN subnetworks with differing data rates
  • Filtering and buffering of data traffic
  • Support of 11 bit and 29 bit identifiers
  • Increase of the system extension
  • Microcontroller NXP LPC2119 with 2 internal CAN controllers

Technical Data

Layout and Connection

The connection to the CAN busses is achieved via pluggable terminals. Besides the CAN signals the clamps also carry the supply voltage for CG-ARM7. The following table shows the pin assignment of the internally connected interfaces.

Pin Name Function
1 +24V Supply voltage
2, 3, 6 GND Ground
4 CAN1_H CAN1 signal line (dominant high)
5 CAN1_L CAN1 signal line (dominant low)
7 CAN2_H CAN2 signal line (dominant high)
8 CAN2_L CAN2 signal line (dominant low)

Limiting Values

Parameter Minimum Maximum Unit
Storage temperature -20 +80 °C
Operating temperature 0 +60 °C
Supply voltage -100 +35 V
Voltage on bus connections -30 +30 V
Admissible power consumption (at 60°C) n.s. 2000 mW

Any (also temporary) stress in excess of the limiting values may cause permanent damage on CG-ARM7 and other connected devices. Exposure to limiting conditions for extended periods may affect the reliability and shorten the life cycle of the device.

Nominal Values

Parameter Minimum Typical Maximum Unit
Current consumption (running idle) n.s. 40 n.s. mA
Supply voltage 10 24 30 V

All values, unless otherwise specified, refer to a supply voltage of 24V and an environmental temperature of 20°C.

Scope of Delivery

  • CAN/CAN Gateway CG-ARM7
  • Plug with screw terminals
  • User Manual
  • Configuration software