Watlow Series F4S/D Manual de usuario descargar pdf (Pagina 124)

12.2 ■ Wiring Watlow Series F4S/D

WARNING:

Provide a labeled switch

or circuit breaker

connected to the Series

F4 power wiring as the

means of disconnection

for servicing. Failure to

do so could result in

damage to equipment

and/or property, and/or

injury or death to

personnel.

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WARNING:

To avoid damage to

property and equipment,

and/or injury of loss of

life, use National Electric

Code (NEC) standard

wiring practices to install

and operate the Series

F4. Failure to do so could

result in such damage,

and/or injury or death.

CAUTION:

Maintain isolation

between analog inputs 2

and 3, and between

analog input 1 and digital

inputs 1 to 4 to prevent a

ground loop. A ground

loop may cause incorrect

readings. Failure to

follow this guideline

could result in damage to

equipment and product.

Power Wiring

Use only number 14, AWG copper conductor rated for at least 60°C.

100 to 240V‡ (ac/dc), nominal (85 to 264 actual) F4 _ H - _ _ _ _ - _ _ _ _

The Series F4 has a non-operator-replaceable fuse Type T (time-lag)

rated at 2.0 or 5.0A @ 250V.

Figure 12.2 — Power wiring.

Sensor Installation Guidelines

Thermocouple inputs: Extension wire for thermocouples must be of

the same alloy as the thermocouple to limit errors.

If a grounded thermocouple is required for input 2, the signal to input 3

must be isolated to prevent possible ground loops.

RTD input: Each 1 of lead wire resistance can cause a +2°F error when

using a two-wire RTD. A three-wire RTD sensor overcomes this problem.

All three wires must have the same electrical resistance (i.e., same

gauge, same length, multi-stranded or solid, same metal).

Process input: Isolation must be maintained between input 2 and

input 3. If both input 2 and input 3 are process signals, a separate power

supply and transmitter must be used for each input. These inputs must

be electrically isolated from one another to prevent ground loops.

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Watlow Series F4S/D Manual de usuario Pagina 124

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