Siemens SINAMICS SM150 - Voltage Monitoring

Tasks of reference module AD586LR
The reference module installed on the DM10 diagnosis module supplies the reference voltage
for voltage subtraction of the eight analog signals. The reference voltage of 5 V is subtracted
from the input signal in the value range from 0 V to 10 V. The voltage supplied by the reference
element must meet demanding requirements in terms of signal accuracy.
The reference element must satisfy the following signal accuracy criteria:
● High linearity
● Low drift
● Voltage deviation of max. ±5 mV
The signal accuracy of the AD586LR reference element is within the permitted tolerance range
with a deviation tolerance of ±2.5 mV.
3.5.12.5 Voltage monitoring
Tasks of the comparators
The internal voltages are connected via connector -X34 and the external voltages via connector
-X35. These voltages are required for supplying the diagnosis module. At the same time these
voltages are monitored for undervoltage, and the logic signal state is visualized by one LED
in each case. If all the voltages being checked are within the standard range, another LED
(H23) signals "Power Supply OK". Connector -X36 carries the information about the status of
the power supply to the closed-loop control system. If the status of the power supply is reported
to the closed-loop control system as "Power Supply Not OK", the control system intervenes
and shuts down the drive in a controlled manner in order to prevent damage to the drive.
Switching thresholds for voltage monitoring
Input voltage Signal type Connecting terminal Switching threshold
1 signal
Switching threshold
0 signal
+24 VDC 1P24 -X34:1 19.47 V - 19.62 V 18.98 V - 19.12 V
-24 VDC 1N24 -X34:2 19.47 V - 19.62 V 18.98 V - 19.12 V
+24 VDC 2P24_1 -X35:1 19.47 V - 19.62 V 18.98 V - 19.12 V
+24 VDC 2P24_2 -X35:2 19.47 V - 19.62 V 18.98 V - 19.12 V
Description
3.5 Description of the components
SINAMICS SM150 6SL3845-7NN46-7AA0
Operating Instructions 04/2017 49