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The SDM-CAN allows a Campbell Scientific datalogger to sample data directly from a CANbus communication network. This allows testing and verification of CANbus-based data alongside measurements made independently via the datalogger's input channels. The SDM-CAN also supports transmission of data onto a CANbus network.
Read MoreCANbus data can be stored (and synchronized) with other data values measured directly by the data logger, allowing testing and verification of CANbus-based data alongside measurements made independently via the data logger's input channels. The SDM-CAN also supports transmission of data onto a CANbus network.
The SDM-CAN uses the latest Philips SJA1000 CAN controller clocked at 16 MHz; CAN 2.0A and 2.0B active and passive modes are supported, which includes SAE J1939. The CANbus protocol is used in a number of networking applications, including vehicle data acquisition systems (VDAS).
The SDM-CAN can act as a passive “listen-only” device, poll remote devices for data, or act as a sensor. To poll remote devices it sends or responds to Remote Frame Requests. It acts as a sensor by sending data packets to the CANbus network. The SDM-CAN supports baud rates up to 1 MB (1 M, 800 k, 500 k, 250 k, 125 k, 50 k, 20 k, and lower). Non-standard baud rates may be possible. CAN data frames can also be built and sent.
The data logger enables individual modules through an addressing scheme; up to 15 SDM-CANs can be connected to one data logger.
SDM-CAN Helper is an add-on program for our RTDAQ Real-Time Data Acquisition Software. This add-on program walks users through the process of configuring their SDM-CAN, connecting the SDM-CAN to the data logger, sending an appropriate program to the data logger, and setting up their data logger to collect specific values from the CANbus network.
SDM-CAN Helper is available, at no charge, from the Downloads section. Users must have a valid installation of RTDAQ on their computer to install the SDM-CAN Helper program.
Function | Allows a data logger to sample data directly from a CANbus communication network. Uses latest CAN controller. |
Number of Channels | 1 |
Operating Temperature | Tested from -40° to +80°C. |
Operating Voltage | 7 to 26 Vdc |
Isolation | Optional (switch-selectable) galvanic isolation between the data logger and the CANbus. The minimum isolation breakdown is 50 V; this barrier is for signal isolation only (that is, it is not a safety barrier). |
Controller | Uses the latest Philips SJA1000 CAN controller clocked at 16 MHz. |
CANbus Physical Connection | Conforms to CIA draft standard 102 version 2, 9-pin D connector. (The interface will differ from this standard only with respect to pin 9, which outputs 5 Vdc instead of 7 to 13 Vdc.) |
Screw Terminal Block | A three-way, unpluggable screw terminal block for CAN High, Low, and G is provided. |
Safety | For safety reasons, can disable CANbus transmit and acknowledge via a jumper (for example, for in-vehicle, listen-only monitoring) |
Dimensions |
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Weight | 0.3 kg (0.14 lb) |
Typical Current Consumption |
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Active in Self-Powered, Isolated Mode |
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Active, Non-Isolated |
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Standby | < 1 mA (with or without isolation) |
Communications with Data Logger | 50 mA |
RS-232 Port Active | 50 mA |
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
Product | Compatible | Note |
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21X (retired) | ||
CR10 (retired) | ||
CR1000 (retired) | ||
CR1000X | ||
CR10X (retired) | ||
CR200 (retired) | ||
CR200X (retired) | ||
CR205 (retired) | ||
CR206 (retired) | ||
CR206X (retired) | ||
CR210 (retired) | ||
CR211 (retired) | ||
CR211X (retired) | ||
CR215 (retired) | ||
CR216 (retired) | ||
CR216X (retired) | ||
CR23X (retired) | ||
CR295 (retired) | ||
CR295X (retired) | ||
CR300 | ||
CR3000 (retired) | For the CR3000, SDMs are connected to the ports labeled SDM-C1, SDM-C2, and SDM-C3. | |
CR310 | ||
CR350 | ||
CR500 (retired) | ||
CR5000 (retired) | For the CR5000, SDMs are connected to the ports labeled SDM-C1, SDM-C2, and SDM-C3. | |
CR510 (retired) | ||
CR6 | ||
CR800 (retired) | ||
CR850 (retired) | ||
CR9000 (retired) | For the CR9000, SDMs connect to ports provided on the CR9080 PAM module. | |
CR9000X (retired) | For the CR9000X, SDMs connect to ports provided on the CR9032 CPU module. |
Product | Compatible | Note |
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Granite 10 | ||
Granite 6 | ||
Granite 9 |
Data is transferred between the SDM-CAN interface and the data logger using Campbell Scientific’s high-speed SDM communications protocol. The CANBUS Instruction controls the SDM-CAN operation in CRBasic; Instruction 118 controls the SDM-CAN operation in Edlog.
The SDM-CAN draws 1 mA quiescent, up to 120 mA active. The data logger's sealed rechargeable power supply (or an external one) connected to a continuous charging source is recommended.
The SDM-CAN requires a desiccated, non-condensing environment; a Campbell Scientific enclosure is recommended. The SDM-CAN has built-in keyhole flanges for mounting to the backplates of Campbell Scientific enclosures.
Current version of the SDM-CAN firmware.
Add-on package for RTDAQ. Assists users of the SDM-CAN device.
See the SDM-CAN Helper Overview for more information about this product.
Note: The SDM-CAN Helper will only be installed if a valid installation of RTDAQ already exists on the computer.