ICS Schneider Messtechnik SwitchGauge PGS23 Manual De Instrucciones página 14

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5. Commissioning, operation

5.2 Electrical connection

The electrical connection must only be made by qualified skilled personnel. Con-

nection details and switching functions are given on the product label. Connection

terminals and ground terminal are appropriately marked.

For power ratings (see "Specifications") and for circuit protection for inductive and

capacitive loads see chapter 5.3 "Contact protection measures".

Safety instructions for installation

■

Install instruments in accordance with the manufacturer's instructions and the

valid standards and regulations.

■

Only connect circuits with the same voltage and type of protection to the switch

contacts and connecting cables.

■

Only for switch contact models 821 and 851: Limit the maximum current, using

external measures, to a value of ≤ 1 A per circuit.

■

Size the connecting cables for the largest current strength in the circuits and

ensure sufficient UV resistance and mechanical stability.

■

Voltages greater than AC 50 V or DC 120 V:

- Do not connect circuits simultaneously with extra-low voltage circuits or with

safety extra-low voltage (SELV) or protected extra-low voltage (PELV).

- Circuits must offer a device, external to the measuring instrument, that

enables the instrument to be isolated from the electrical supply. This must be

easily accessible and be marked as the isolation device for the instrument.

- Cables for the circuit must fulfil the isolation requirements and conform to, for

example, IEC 60227 or IEC 60245.

- For protection against electric shock, connect the protective conductor con-

nection to the protective earth.

With flexible connecting cables, use isolated end splices. Max. permissible

■

conductor cross-section 1.5 mm².

■

Connecting cables must be suited to the ambient temperature range of the

application.

■

The connecting cables must also be suitable for the supplied cable gland (for

diameter range, see below).

Operating instructions pressure gauges with switch contact models 821, 851 or 830 E