CAN was originally designed in 1983 by Robert Bosch GmbH for use in the automotive industry. It later expanded into other areas, such as industrial automation. CAN is a broadcast, message based protocol (as opposed to address based communication). A good starting point for information about CAN-bus is Wikipedia.org and CAN in Automation.
CAN-bus is a differential serial bus standard which uses the differential balanced line - like RS485 - for improved noise immunity (CAN_L, CAN_H).
Like any other digital communication protocol, CAN-bus has different layers, namely:
PSC-CAN uses CANopen for the higher layers and details for 11 bit CAN identifiers can be found in the programming manual (extended data frame format is tolerated but not supported). The baud rate and node address (number), can be configured using the 8 DIP switches, see configuration for further details.
CANopen functionality is equivalent to Master/Slave behaviour, subject to CiA draft standard 401, supporting to the following features:
PSC-CAN uses two 9-pin D-sub connectors for connecting to a two wire CAN network (CAN high/CAN low), see connectors for further details.
Profibus is a serial field bus which originated in Germany in the late 1980s. Profibus DP is a derivative from original specification. Profibus DP protocol was simpler and thus faster (up to 12Mbit). DP stands for Decentralized Periphery and it is a protocol made for communication between Profibus masters and their slaves. A good starting point for information about Profibus is Wikipedia.org.
As like CAN-bus (above) and other digital communication protocols, Profibus DP is structured into layers (based on the OSI model), namely:
The PSC-PB can be connected to any Profibus DP network as a slave. DP-V0 standard is supported according to IEC 61784 Ed. 1:2002 CPF 3/1 and Profibus protocol is supported according to IEC61158.
The baud rate and node address (number), can be configured using the 8 DIP switches, see configuration for further details.
PSC-PB uses a single 9-pin D-sub (female) connector to connect to a wired physical network (RS485), see connectors for further details.