Vaisala HMT360Series Uživatelská příručka stáhnout pdf (Strana 37)

Chapter 3 _______________________________________________________________ Installation

VAISALA_______________________________________________________________________ 35

Electrical Connections

Refer to local requirements regarding cabling, grounding and galvanic

isolator or barrier connections.

1. Open the transmitter cover and remove the protective cover of the

transmitter base.

2. Thread the power supply wires through the cable gland, see Figure 7

on page 24.

3. Connect the unpowered power supply wires to the connectors: Ch 1

(humidity) and Ch 2 (temperature). Both channels require an own

power supply.

4. Replace the protective cover. Turn the transmitter on ON with the

ON/OFF switch, see Figure 24 on page 62.

5. Close the cover. The transmitter is ready for use.

When using the transmitter in hazardous locations, the use of galvanic

isolators or barriers is essential. The following barrier & isolator are

available in Vaisala: barrier No. 210664 (STAHL 9001/51-280-091-141)

and galvanic isolator No. 212483 (STAHL 9160/13-11-11). Examples of

connections and more information on installation in hazardous locations is

given in section Examples of Connections on page 41.

WARNING

Connect the transmitter always via galvanic isolators or Zener barriers in

hazardous environments.

WARNING

Be sure that the main power switch of the transmitter is set off before

making any electrical installations in hazardous areas.

NOTE

As Ch 1 is a main output, the transmitter does not operate if only Ch 2 is

connected (Ch 2 is optoisolated from transmitter electronics).

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Vaisala HMT360Series Uživatelská příručka Strana 37