Only qualified personnel, familiar with the “Warning” page at the beginning of this manual, may work on or operate this device.

When installing and connecting the device the warning notices at the beginning of Chapter “Installation and Connection” (Chapter “Installation and Connection”) must be observed.

The device must be reliably grounded before auxiliary voltage is turned on.

The surface-mounted case is grounded using the bolt and nut, appropriately marked, as the ground connection. The flush-mounted case must be grounded in the area of the rear sidepieces at the location provided. The cross-section of the ground conductor must conform to applicable national standards. A minimum cross section of 2.5 mm² (US: AWG12 or thicker) is required.

In addition, a protective ground connection at the terminal contact on the power supply module (identified by the letters “PE” on the terminal connection diagram) is also required for proper operation of the device. The cross-section of this ground conductor must also conform to applicable national standards. A minimum cross section of 1.5 mm² (US: AWG14 or thicker) is required.

Before working on the device itself or in the space where the device is connected, always disconnect the device from the supply.

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.

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.

When increased-safety machinery is located in a hazardous area the P632 must always be installed outside of this hazardous area.

The fiber-optic interface may only be connected or disconnected when the supply voltage for the device is shut off.

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.

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 “Technical Data”).

When using the programmable logic (function group LOGIC), the user must carry out a functional type test to conform to the requirements of the relevant protection/control application. In particular, it is necessary to verify that the requirements for the implementation of logic linking (by setting) as well as the time performance during device startup, during operation and when there is a fault (device blocking) are fulfilled.