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Spectrum Controls 1734sc-IF4U User Manual

Page 20

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2-8

Point IO™ 4 Channel Universal Analog Input Module



User’s Manual Pub. 0300266-01 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 (Terminal Block Pinout)

RTB

Pin# Usage Usage RTB

Pin#

0

Ch 0+

Ch 2+

1

2

Ch 0-

Ch 2-

3

4

Ch 1+

Ch 3+

5

6

Ch 1-

Ch 3-

7