SerCAN is a protocol converter between CAN and devices with RS232 interfaces. SerCAN allows the connection of devices with serial interfaces to CAN based systems, e.g measuring devices, barcode scanners and handheld terminals.
SerCAN covers the typical applications for protocol conversions. If SerCAN is used as universal CAN interface, the generation of any desired CAN messages under control of the serial device is the most favourable solution. In this case, a fixed,an error correcting protocol is used at the serial interface. If any desired serial data stream has to be transmitted over the CAN, a confirmed protocol between SerCAN and the CAN device is used. In applications, where serial protocol as well as CAN protocol are fixed, the data conversion can be realized by application specific programming of SerCAN.
SerCAN devices include one CAN interface with two connectors as well as two independent serial connections serving for the connection of external serial devices.
The pin assignment of the CAN connectors is shown in the following table.
| Pin | Name | Function |
|---|---|---|
| 2 | CAN_L | CAN_L bus line (dominant low) |
| 3, 6 | GND | Ground |
| 7 | CAN_H | CAN_H bus line (dominant high) |
| 9 | V+CAN | Power supply +24V |
The pin assignment of the RS232 connectors is shown in the following table.
| Pin | Name | Function |
|---|---|---|
| 2 | RxD | Receive data line |
| 3 | TxD | Send data line |
| 5 | GND | Ground |
| 7 | RTS | Request-to-send control line |
| 9 | CTS | Clear-to-send control line |
| 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) | – | 2000 | mW |
| Any (also temporary) stress in excess of the limiting values may cause permanent damage on Ctrans OL and other connected devices. Exposure to limiting conditions for extended periods may affect the reliability and shorten the life cycle of the device. | |||
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Current consumption (running idle) | – | 50 | – | mA |
| Current consumption (250kBit/s, 100% busload) | – | 58 | – | mA |
| Supply voltage | 12 | 24 | 30 | V |
| All values, unless otherwise specified, refer to a supply voltage of 24V and an environmental temperature of 20°C. | ||||