Connect the PSC-CAN to the previous node (or controller) using the 9-pin female connecter. Loop to the next node by using the 9-pin male connector. If the PSC-CAN is the last node, the 9-pin male connector shall not be connected and a 120Ω termination resistance shall be included in the 9-pin female connection. Note that in a correctly set-up CAN network, there shall exist two end termination resistors, each of 120 ohms. Only the devices at the ends of the cable need a termination resistor.
Details of the 9-pin CAN-bus connector
Pin | Name | Description |
1 | n/c | |
2 | CAN_L | Dominant low (signal) |
3 | CAN_GND | Ground |
4 | n/c | |
5 | CAN_SHLD | Optional shield |
6 | GND | Optional looped ground |
7 | CAN_H | Dominant high (signal) |
8 | n/c | |
9 | CAN_V+ | Optional looped power |
Connect the PSC-PB to the profibus network using the 'daisy-chain' bus topology. Up to 32 devices can be connected in each segment of the profibus network. Each segment shall be correctly terminated by a 220Ω resistor between A-line and B-line (data lines). Powering of the 220Ω termination resistor ensures a defined idle state potential on the data lines, this is achieved by connecting a 390Ω resistor between +5V and B-line and another 390Ω resistor between A-line and GND (at the termination).
Details of the 9-pin Profibus connector
Pin | Name | Description |
1 | Shield | Shield / Functional Ground |
2 | n/c | |
3 | B-line | Data line |
4 | RTS | TTL direction control |
5 | GND | Data Ground |
6 | +5V | Supply voltage for terminator resistance |
7 | n/c | |
8 | A-line | Data line |
9 | n/c |