Local process image

The default setting is for all the connected Bus Terminals to be assigned to the local process image. Mapping within the Bus Terminal coupler is carried out according to the following rule:
First all the byte-oriented (analog) Bus Terminals, in the sequence in which they are inserted, followed by the bit-oriented (digital) Bus Terminals, rounded up to a whole byte.

Sample

The BK9500 is connected to a PC over the USB. The address of the coupler is set to 1. The following terminals are attached to the coupler (the number of the bits that are mapped is given in brackets):

Location	Terminal on the rail
POS00	BK9500
POS01	KL1002 (2 input bits)
POS02	KL1002 (2 input bits)
POS03	KL1002 (2 input bits)
POS04	KL1114 (4 input bits)
POS05	KL1114 (4 input bits)
POS06	KL3002 (2 x 16 input bits)
POS07	KL9200 (-)
POS08	KL2012 (2 output bits)
POS09	KL2012 (2 output bits)
POS10	KL2012 (2 output bits)
POS11	KL2012 (2 output bits)
POS12	KL4002 (2 x 16 output bits)
POS13	KL9010 (-)

It follows that the Bus Coupler's process image appears as indicated below:

Process image for the inputs

Relative byte address of the coupler/inputs	Bit position	Position in the station	Bus Terminal
0, 1	-	POS06	KL3002, channel 1
2, 3	-	POS06	KL3002, channel 2
4	0	POS01	KL1002, channel 1
4	1	POS01	KL1002, channel 2
4	2	POS02	KL1002, channel 1
4	3	POS02	KL1002, channel 2
4	4	POS03	KL1002, channel 1
4	5	POS03	KL1002, channel 2
4	6	POS04	KL1114, channel 1
4	7	POS04	KL1114, channel 2
5	0	POS04	KL1114, channel 3
5	1	POS04	KL1114, channel 4
5	2	POS05	KL1114, channel 1
5	3	POS05	KL1114, channel 2
5	4	POS05	KL1114, channel 3
5	5	POS05	KL1114, channel 4

Process image of the outputs

Relative byte address of the coupler/outputs	Bit position	Position in the station	Bus Terminal
0, 1	-	POS12	KL4002, channel 1
2, 3	-	POS12	KL4002, channel 2
4	0	POS08	KL2012, channel 1
4	1	POS08	KL2012, channel 2
4	2	POS09	KL2012, channel 1
4	3	POS09	KL2012, channel 2
4	4	POS10	KL2012, channel 1
4	5	POS10	KL2012, channel 2
4	6	POS11	KL2012, channel 1
4	7	POS11	KL2012, channel 2