GESTRA SRL 6-50, Оригинальная инструкция по установке

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12
In the system: Wiring the logic unit
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We recommend to use the same safety power supply unit in order to supply the logic
unit SRL 6-50 and the level switches NRS 1-50, NRS 1-51 with 24 V DC.
Note
Tools

Screwdriver, size 2.5, completely insulated according to VDE 0680-1

Screwdriver, size 2
Danger

For the supply of the logic unit SRL 6-50 with 24 V DC use a safety extra-low voltage
(SELV) power supply unit that must be electrically isolated from dangerous contact
voltages and must meet at least the requirements on double or reinforced isolation
acc. to DIN EN 50178 or DIN EN 61010-1 or DIN EN 60730-1 or DIN EN 60950 (safe
electrical isolation).

Any item of equipment that you want to connect to terminals 6, 7, 14, 15 (standby
input 1 / 2) of level switch NRS 1-50, NRS 1-51 must be certified to have at least
double or reinforced isolation according to DIN EN 50178 or DIN EN 61010-1 or DIN
EN 60730-1 or DIN EN 60950 (safe isolation) between the standby inputs, the signal
outputs and the live parts of the installation that are not supplied with safety extra-low
voltage.
Attention

Fuse the logic unit with an external 0.5 A semi-delay fuse (see “Technical Data”).

To connect the level electrode NRG 1X-51 / level switch NRS 1-51 (high level alarm)
bridge terminals 6 and 7 with a wire link.

To connect the level electrode NRG 1X-50 / level switch NRS 1-50 (water level limiter,
application in hot-water installation) bridge terminals 5 and 8 with a wire link.

If external indicator lights are connected the logic unit must supply them with 24 V DC.

Install connecting lines to the logic unit and to the limit switches separated from power
cables.

Do not use unused terminals as support point terminals.