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Operating Manual
MHM-97442
Test value 1
Use this input to activate Test value 1. A "High" signal at this input activates Test value 1
defined in tab Test (see Test). See
Test value 2
Use this input to activate Test value 2. A "High" signal at this input activates Test value 2
defined in tab Test (see Test). See
CAUTION
An activated test value replaces the measuring values.
To avoid an unintentional trip during the ongoing operation, ensure that at the same time
not more than one monitor has an activated "Test value" ≥ "Trip limit value". Deactivate the
test value and reset the trip message of the previously tested monitor before starting to
test the next monitor.
If another monitor detects a disturbance or an overspeed while testing a monitor with
"Test value" ≥ "Trip limit value" the machine will be tripped.
Note
As long as the "Test value" is below the current speed value, the overspeed protection
function remains active.
Channel OK and function outputs
Each monitor has 6 function outputs and one Channel OK output (see
connection). These +24 V voltage outputs are short-circuit proof and electrically isolated
from the monitor circuits. The voltage level for "Low" signals is 0 V. The voltage level for
"High" signals is 2 V below the system supply voltage. The maximum permissible output
current is 25 mA for each of the outputs. Terminals 6 and 19 are common reference points
of the outputs.
Function outputs
Use the configuration software to assign different functions to the digital outputs OUT1 to
OUT6 (see
configuration. Select between Open-circuit mode and Closed-circuit mode.
In operating principle "Open-circuit mode", the active state shows a "High" signal (+24 V) at
the digital output and the passive state a "Low" signal (0 V).
In operating principle "Closed-circuit mode", the active state shows a "Low" signal (0 V) at
the digital output and the passive state a "High" signal (+24 V).
Channel OK output
Output Channel OK shows the condition of the monitor and the connected sensor. As
long as the system supervision function has not detected a system fault, the Channel OK
output is in the initial state and the corresponding LED OK at the monitor front is switched
on.
In case of a system fault the Channel OK state of the monitor is switched off. This is
indicated by the output.
MHM-97442, Rev. 2.06
Test values
Test values
Digital
Outputs). Also define the operating principle of the outputs during the
Installation and commissioning
for further information about the test values.
for further information about the test values.
February 2023
Table 4-3
for
43
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