7.4. Outputs
The controller has maximal three outputs. Each of them can
be confi gured as a control or an alarm output.
For the proportional control (with the exception of analog
outputs), the pulse period is additionally set.
The pulse period is the time which goes by between succes-
sive switches of the output during the proportional control. The length
of the pulse period must be chosen depending on dynamic object pro-
perties and suitably for the output device. For fast processes, it is recom-
mended to use SSR relays. The relay output is used to steer contac-
tors in slow-changing processes. The application of a high pulse period
to steer slow-changing processes can give unwanted effects in the sha-
pe of oscillations. In theory, lower the pulse period, better the control,
but for a relay output it can be as large as possible in order to prolong
the relay life.
Recommendations concerning the pulse period: Table 3
Output Pulse period to Load
Electromagnetic
relay
Recommended >20s,
min. 10 s
2A/230V a.c.
min. 5 s 1A/230V a.c.
Transistor output 1...3 s SSR relay
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