SAE J1939 Joystick Is A Hand-Operated Hall Effect Controller Designed For In-Cab Vehicle Applications
The HJ series of joysticks by Apem (USA) are hand-operated devices for in-cab vehicle applications. They are CAN-Bus-connectable, meaning the joysticks support CAN Bus protocols such as CANopen and SAE J1939. They apply non-contacting Hall-effect sensors, and they are designed for up to five million usage cycles. The products provide several handle options. Typical applications include refuse handling trucks, snow removal, and street cleaning vehicles.
The joysticks are specified for an extended temperature range of -40 °C to + 85 °C. The panel sealing is IP63-rated. The SAE J1939 version features up to 24 digital inputs and up to 11 analog inputs. The CANopen interface complies with the CiA 401 profile specification. To meet various application requirements, the joysticks are also highly customizable.
- Rugged, hand operation
- Hall effect sensing
- 5 million life cycles
- Redundant output available
- CAN Bus J1939, CANopen and USB outputs options
- Several handle options
SAE J1939 ECU Simulator Board With USB Port
The jCOM.J1939.USB gateway board is a high-performance, low-latency vehicle network adapter for SAE J1939 applications. It allows any host device with a USB COM port to monitor SAE J1939 data traffic and communicate with the SAE J1939 vehicle network.
The board supports the full SAE J1939 protocol according to J1939/81 Network Management (Address Claiming) and J1939/21 Transport Protocol (TP). It is also supported by an extensive programming interface for Windows and Linux/Ubuntu applications, including full C/C++/C# source code for short time-to-market developments.
The strength of the board lies in the fact that the entire SAE J1939 protocol, including all timing requirements, is stored on-chip, thus taking the burden off the main system. The board uses a USB COM port to communicate with the main system, i.e. all data transfer is handled through a standard COM port access.
The communication protocol between the board and the main system is well documented and thus allows a porting to any computer system with a USB connection. Working source code libraries exist for Windows (C# under Visual Studio 2012/2013), Linux and its derivatives (C++ using Code::Blocks), and Raspberry Pi (C using the standard gcc compiler).
SAE J1939 is a series of SAE recommended practices that have been developed to provide a standard architecture by which various electronic systems on a vehicle can communicate. It was developed by the Truck and Bus Control and Communications Network Subcommittee of the Truck and Bus Electrical and Electronics Committee, but its application is not [...]
The following is an excerpt from A Comprehensible Guide To J1939 by Wilfried Voss. While other higher layer protocols based on the CAN Bus do not support dynamic node address assignments per default, the SAE J1939 standard provides yet another ingeniously designed feature to uniquely identify ECUs and their primary function.Note: The CAN standard in itself does not support node (ECU) addresses, only [...]
The following is an excerpt from A Comprehensible Guide To J1939 by Wilfried Voss. SAE J1939 is a very ingeniously designed protocol that takes a resourceful advantage of the CAN 29-Bit message identifier. Rather than relying on a myriad of protocol functions, SAE J1939 uses predefined parameter tables, which keeps the actual protocol on a comprehensible level. However, these parameter tables [...]
The following is an excerpt from A Comprehensible Guide To J1939 by Wilfried Voss. The main document describing the J1939 message format is SAE J1939/21 – Data Link Layer. J1939/21 defines the use of the CAN data frame (29-bit identifier, Parameter Group Numbers – PGN, etc.) and the transport protocol functions, i.e. a definition of how messages longer than the standard [...]
The following is an excerpt from A Comprehensible Guide To J1939 by Wilfried Voss. SAE J1939 provides three communication methods, each serving a specific purpose.1. Destination Specific Communications:Destination specific communications use PDU1 (PF values 0 to 239), but also the global destination address 255. There are cases where this method will require the utilization of destination specific Parameter Group Numbers, for instance, [...]
The following is an excerpt from A Comprehensible Guide To J1939 by Wilfried Voss. SAE J1939 is a higher-layer protocol based on Controller Area Network (CAN). It provides serial data communications between microprocessor systems (also called Electronic Control Units - ECU) in any kind of heavy-duty vehicles.Everything that has to do with CAN is based on maximum reliability with the [...]
The following is an excerpt from A Comprehensible Guide To J1939 by Wilfried Voss. The standard CAN message frame uses an 11-bit message identifier (CAN 2.0A), which is sufficient for the use in regular automobiles and any industrial application, however, not necessarily for off-road vehicles.The Society of Automotive Engineers (SAE) Truck and Bus Control and Communications Subcommittee had developed a family of [...]
The following is an excerpt from A Comprehensible Guide To J1939 by Wilfried Voss. Even though extremely effective in automobiles and small applications, CAN alone is not suitable for machine automation, since its communication between devices is limited to only 8 bytes per message. As a consequence, higher layer protocols such as CANopen for machine control, DeviceNet for factory automation and [...]
The following is an excerpt from A Comprehensible Guide To J1939 by Wilfried Voss. The Society of Automotive Engineers (SAE) Truck and Bus Control and Communications Subcommittee has developed a family of standards concerning the design and use of devices that transmit electronic signals and control information among vehicle components. SAE J1939 and its companion documents have quickly become the [...]