BECKHOFF BK3xx0 - Manual (Page 36)

Notes on the Documentation
34 Fieldbus Components
Configuration of Digital Modules
After the DP modules for the activated functions of the Bus Coupler and the complex terminals (KL15xx, KL25xx,
KL3xxx, KL4xxx, KL5xxx, KL6xxx, KL8xxx) have been added to the Bus Coupler in the DP configuration tool in the
sequence in which they are plugged in, the digital terminals follow. In the case of digital terminals, it is only necessary
for the total of the digital inputs and outputs of the modules that have been added to agree with the number of digital
inputs and outputs that are plugged in:
Example:
4 x KL1408 = 32 digital input bits
2 x KL2408 = 16 digital output bits
3 x KL1114 = 12 digital input bits
2 x KL2114 = 8 digital output bits
4 x KL1012 = 8 digital input bits
1 x KL2012 = 2 digital output bits
=> 52 digital input bits and 26 digital output bits
The following combinations of DP modules could, for instance, now be added in the DP configuration tool to the Bus
Coupler:
Alternative 1
8 digital input bits
8 digital input bits
8 digital input bits
8 digital input bits
8 digital input bits
8 digital input bits
8 digital input bits
8 digital output bits
8 digital output bits
8 digital output bits
8 digital output bits
Alternative 2
56 digital input bits
32 digital output bits
Other alternatives are possible, provided the total of digital inputs is 56 bits (the next number larger than 52 divisible
by 8) and that the sum of the digital inputs is 32 bits (the next number larger than 26 divisible by 8).