Siemens SICAM A8000 Series Manual page 77

2.10.5 Block Diagram
CM-8820
Danger
The connectors X1 and X2 may be detached or attached in de-energized state only!
Warning
The inputs of the connectors X1 and X2 must not be connected directly with a mains supply circuit!
Note
Within the signal inputs exists only functional insulation. Therefore, the use of different current circuits is
not permitted.
Caution
Direct currents cannot be measured with CM-8820.
Note
Take account of the direction of current flow when connecting the current measuring inputs. With inverse
connection, the measured values are inverted and receive a negative sign.
SICAM A8000 Series, SICAM I/O Modules
DC8-012-2.06, Edition 09.2019
reinforced insulation
Unrestricted
Standard I/O Modules
77