PR electronics 4225 User Manual

4225V100-UK 19
Programming
The 4500 communication interfaces provide complete module programming and access to a wide range of operational
features that help you when using the device.
This chapter deals with the 4225 advanced features. The complete menu structure and programming options can be found in
the Routing diagram section.
Configurable input error indication and input limits
Configurable input error detection
To increase system safety and integrity, you can program a high and low input error detection level. Input signals outside the
low and high limits will cause the output of the device to go to the programmed error state.
The two configurable input error detection levels can be set and enabled individually, just as it is possible to individually set
the output error indication for each of the two detection levels. This allows users to differentiate process faults, broken or
short input wires.
Available output error states for low and high limit: UP, DOWN, ZERO and NONE.
Output error indication uses the error states defined by NAMUR NE43 for a 4...20 mA output. For all other output spans
equivalent output error indications are used (see tables on pages 20-21).
When input limit is enabled and error state NONE is selected, the input error is detected and presented to you on the display
with IN.ER and flashing display, but not indicated on the output signal.
Example – 4...20 mA output span and both Limit high and Limit low set to ZERO
Device
Min. input
Configurable input
limit, low
Configurable input
limit, high
Device
Max. input
Error frequency
Error frequency
Input:
Hz
Normal measuring range
Output error indication = ZERO
Extended measuring range
20.0 mA
4.0 mA
20.5 mA
3.8 mA
Normal range
Extended working range
Output error current can be
individually set to:
ZERO: 0 mA
UP: 23 mA
DOWN: 3.5 mA
NONE: No error indication,
output limited to 3.8 mA
Output error current can be
individually set to:
ZERO: 0 mA
UP: 23 mA
DOWN: 3.5 mA
NONE: No error indication,
output limited to 20.5 mA

PR electronics 4225 Specifications

General

Brand	PR electronics
Model	4225
Category	Media Converter
Language	English