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As a policy of continual improvement, STAUFF reserves the right to alter the specification without prior notice.
201.031
Date of Issue: 06 November 2018
So for example if “continuous testing" and "stop testing when clean" are both enabled, and if the
start signal is being held on throughout testing, then EITHER the start signal vanishing OR a
clean result can terminate testing.
This is not the same thing as the "start signal delimited test" option ("start signal defines test
duration" in user settings when enabled). This is for using the start signal to control the duration
of each *single* test, only.
Other ways to test are:
From the LPM front panel START button, if fitted (D Keyboard option)
Via LASPAC-View or PLC Modbus command
Periodic automatic testing according to a programmed test mode
6.1.2.6 Alarm Outputs
These are opto-isolated switches that can be used to signal external indicators, PLC inputs or other
equipment (e.g. pump on/off control).
The exact function of these outputs is determined by the Alarm Mode setting (section 6.3.3.9).
The outputs are “voltage free” contacts that can switch AC or DC signals up to 36V nominal (60V
absolute maximum peak voltage).
Item
Minimum
Maximum
Voltage
36V DC
Current
0.5A
6.1.2.7 4-20mA Connection
See Figure 6.7 for a schematic.
The two 4-20mA outputs are sourced from the main supply voltage DC+. These may be connected to the
4-20mA inputs of a process indicator or a PLC. The 0V connection is then also normally connected to
the PLC 0V.
The 4-20mA outputs can be converted to 0-5V outputs by connecting a 250 ohm resistor between each
output and 0V. Similarly they can be converted to 0-10V outputs by connecting 500 ohm resistors.
For details of how the test results are represented by the 4-20mA signals, see section 6.4.3.