DANGER
The secondary circuit of live system current transformers must not be
opened! If the secondary circuit of a live CT is opened, there is the danger
that the resulting voltages will endanger personnel and damage the
insulation.
For pin-terminal connection devices, the terminal block for connection to the
current transformers is not a shorting block. Therefore always short-circuit
current transformers before loosening the threaded terminals.
DANGER
The power supply must be turned off for at least 5 s before power supply
module V is removed. Otherwise there is the danger of an electric shock.
DANGER
When increased-safety machinery is located in a hazardous area the P634
must always be installed outside of this hazardous area.
WARNING
The fiber-optic interface may only be connected or disconnected when the
supply voltage for the device is shut off.
WARNING
The PC interface is not designed for permanent connection. Consequently,
the female connector does not have the extra insulation from circuits
connected to the system that is required per VDE 0106 Part 101. Therefore,
when connecting the prescribed connecting cable be careful not to touch the
socket contacts.
WARNING
Application of analog signals to the measuring inputs must be in compliance
with the maximum permissible rating of the measuring inputs (see “Technical
Data”, Chapter 2, (p. 2-1)).
P634 10 Commissioning
10-2 P634/EN M/R-42-A // P634‑311‑653
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