Baldor BXII installation manual CAN connectors, 4-20Input / Output, MN1904

4.7.7 CAN connectors - X16 & X17

CAN (Controller Area Network) offers very reliable serial communications over a two wire twisted pair cable. In an industrial environment, the probability of an undetected error is 4.7x10-11. CAN also offers high speed data transfer (up to 1Mbit/s, dependent on bus length) and low cost multiplex wiring schemes. CAN is optimized for the transmission of small data packets and therefore offers fast update of I/O devices (peripherals) connected to the bus. The CAN network allows several CAN peripheral devices to be attached to the same controller.

The CAN connectors provide access to CANopen (CAN1) and Baldor CAN (CAN2) busses on two separate connectors. Both busses are available on both connectors to simplify “daisy-chaining” of peripherals.

1

8

Location	Top panel, connectors X16 & X17
Pin	Name	Description
1	CAN1+	CANopen
2	CAN1-	CANopen
3	(NC)	Not connected

4CAN 0V Ground/earth reference for CAN signals

5	CAN V+	CAN remote node power V+ (12-24V)
6	(NC)	Not connected
7	CAN2+	Baldor CAN
8	CAN2-	Baldor CAN

Description

CAN interfaces using RJ45 connectors.

Correct operation of CAN can only be achieved with screened/shielded twisted-pair cabling. CAN1+ / CAN1- and CAN2+ / CAN2- must form twisted pairs with the shield connected to the connector backshell, as shown in Figure 13. A range of suitable CAN cables are available from Baldor, with catalog numbers beginning CBL004-5...

Baldor HMI	NextMove BXII		NextMove BXII		End node
Operator Panel	Twisted pair	1	Twisted pairs	2
2		2		2	2
	2		2
7	1	1	1	1	1
TR					TR
	5	5	5	5	5
	4	4	4	4	4

Figure 13 - Typical CAN network connections

4-20 Input / Output MN1904