Project Planning - Weidmuller SAI Active Universal Pro Series Manual

Project Planning with the Universal Pro
3.1

Project planning

Planning the bus system
The following steps must be taken into consideration
when designing an installation:
1 Location of the machine or facility
2 Assignment of the signals to the installation to a
logical group
3 Selection of the field devices
4 Assignment of the signals to the field devices
5 Determination of where the field devices are to
be installed
Criteria for determining the correct SAI distributor:
Size of the connectors
Number of poles of the I/O connec-
tions
T-piece
Inputs / outputs
Shielding
Signals
Table 1 Determining the correct SAI distributor
You can find more information about determining the correct selection of products in Appendix A:
Product Overview.
16
Determine the size of the connectors to suit you application, the de-
sign of the sensors or according to your personal preferences.
Weidmueller offers both M12 and M8 variants for purely digital sig-
nals.
Please consider the sensor/actuator cable to be connected; possi-
ble options are 3 or 5 poles.
Specifically for 5-pole M12 sensor connections, you can feed two
cables to a distributor input by means of a Y-piece.
Weidmueller has a variety of SAI distributors on offer such as a
variant with 16 digital inputs, with mixed digital inputs/outputs as
well as an analogue/digital version (for more information please re-
fer to Chapter 4: (Connecting SAIs).
Shielding by means of metal connectors is necessary for bus con-
nections. We recommend the same approach for analogue signals
to restrict the susceptibility to interference.
Please consider if you wish to transmit analogue or digital signals.
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