GE MLJ1000, Manual

Page: 22 / 42

GEK - 105560
21
5. DESCRIPTION OF HARDWARE
5.1 CASE
The case of the MLJ is made of steel plate, with an anti-corrosion treatment and painted with epoxy
powder paint. The standard dimensions are shown in figure 3.
The front cover is made of a transparent plastic material fitted tightly to the case, forming a seal that
prevents dust from entering and protects it from any accidental tampering. Included is a switch which
allows access to the ENTER button without having to remove the cover. With this button the readout
menu can be accessed allowing visualization of all the parameters indicated on the characteristic plate
under the title DISPLAY.
The relay can be withdrawn completely from its case without having to disconnect any wires.
Nevertheless, it is advisable to disconnect the voltage of the auxiliary feed before removing the relay,
though it is not mandatory.
5.2 INTERNAL CONNECTIONS
External wiring is carried out in the two terminal blocks mounted in the rear part of the case. Each
terminal block contains 12 terminals with screws M3 (metric 3 mm diameter) (see figure 4).
There is no internal wiring, given that the relay is made up of a removable card with a connector
designed for directed insertion into the terminal blocks.
5.3 IDENTIFICATION
The complete relay model is indicated on the nameplate. (See figure 2).
The terminal blocks are identified by a letter located on the back plate, just above the left edge (looking
at the relay from the back) of each block. There are two terminal blocks in each case, each identified
by a letter: A or B.
In each terminal block, the terminals are labeled from 1 to 12.
5.4 MLJ FRONT DEVICES
On the front of the MLJ on the nameplate are the following setting and signaling elements:
Control pushbuttons
The MLJ comes with three push buttons to control all of the relay operations.
ENTER
↵
PLUS +
MINUS –