2
Information for the end user
2.1 Introduction
EXOclever is a range of freely programmable controllers for control, regulation, supervision and
communication in automation installations. They offer great possibilities when constructing different types
of control and regulation systems. EXOclever has a modular design that makes it easy to adapt the number
and type of inputs and outputs required, as well as the type of communication needed by the individual
client. EXOclever can be used either as stand-alone units or together with other EXO products as part of a
larger automation system. In large automation systems, EXOclever is the basis, with EXOcompact and
EXOdos as good supplements. Software applications such as EXOdesigner and EXOscada can be used to
their full extent with EXOclever.
EC-PU4-2 supports Modbus master 3.0 and Controller Web.
2.2 General information
2.2.1
With AC supply
The 24 V AC supply, typically a 230 V / 24 V transformer, is connected to contacts G0 (2), signal ground
and G (1), phase.
The EMI earth must be connected to the earth rail or similar to protect against disturbances.
N
Noottee!! The cable screen should be earthed at all isolated ports but only at one port if using unisolated
ports (see section
).
2.2.2
With DC supply
The 24 V DC supply, typically a stabilized power supply, is connected to contacts - (2) and + (1).
The EMI earth must be connected to the earth rail or similar to protect against disturbances.
N
Noottee!! The cable screen should be earthed at all isolated ports but only at one port for each power
source if using unisolated ports (see section
).
2.2.3
Using an isolated communication port
✓
At longer distances (>30 m) or when experiencing communication problems, terminate bus with 100
Ω / 0.5 W in both ends.
✓
Shielded cables are preferable, use twisted pair with min. 24 AWG conductor size.
✓
Cable screen should be connected to “N” terminal at all connected ports (isolated).
2.2.4
Using the EFX port
✓
At longer distances (>10 m) or when experiencing communication problems, terminate bus 100 Ω /
0.5 W in both ends.
✓
Shielded cables are preferable, use twisted pair with min. 24 AWG conductor size.
✓
Cable screen should be connected to “N” terminal at both ends (port isolated at PIFA end).
6 (18)
EXOclever EC-PU4-2 manual, Rev. A