Spectrum-controls 1734sc-IE2CH Instrukcja Użytkownika Pobierz pdf (Strona 20)

2-8 Point IO™ 2/4 Channel Analog HART Module

User’s Manual Pub. 0300257-01 Rev. A

Grounding

Attention

USE SUPPLY WIRES SUITALE FOR 10°C ABOVE SURROUNDING

AMBIENT

Attention

UTILISER DES FILS D’ALIMENTATION QUI CONVIENNENT A

UNE TEMPERATURE DE 10°C AU-DESSUS DE LA

TEMPERATURE AMBIANTE

• This product is intended to be mounted to a well-grounded mounting surface

such as a metal panel. Additional grounding connections from the module’s

mounting tabs or DIN rail (if used) are not required unless the mounting surface

cannot be grounded.

• Under normal conditions, the drain wire (shield) should be connected to the

metal mounting panel (earth ground). Keep shield connection to earth ground as

short as possible.

• Ground the shield drain wire at one end only. The typical location is as follows:

o For grounded thermocouples or millivolt sensors, this is at the sensor

end.

o For insulated/ungrounded thermocouples, this is at the module end.

Contact your sensor manufacturer for additional details.

• Refer to Industrial Automation Wiring and Grounding Guidelines, Allen-

Bradley publication 1770-4.1, for additional information.

Noise Prevention

• Route field wiring away from any other wiring and as far as possible from

sources of electrical noise, such as motors, transformers, contactors, and ac

devices. As a general rule, allow at least 15.2 cm (6 in.) of separation for every

120V of power.

• Routing field wiring in a grounded conduit can reduce electrical noise.

• If field wiring must cross ac or power cables, ensure that they cross at right

angles.

• If noise persists for a device, try grounding the opposite end of the cable shield

or ground both ends of the shield.

2.5.1 Wiring Diagram

Refer to the following wiring diagrams for field wiring connections.

Table 2-1 (4 Ch Terminal Block Pinout)

RTB Pin# Usage Usage RTB Pin#

0 Input 0 Input 1 1

2 Input 2 Input 3 3

4 Common Field Power

6 Chas GND

Chas GND

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 83 84

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