Watlow Series V4T Manuel d'utilisateur télécharger pdf (Page 6)

6 Watlow Series V4

Input Wiring

Figure 6a – Thermocouple

Extension wire for thermocouples must be of the same alloy as the thermo-

couple itself to limit errors.

Figure 6b – RTD (2- or 3-Wire) 100Ω Platinum

There could be a +2°F input error for every 1Ω of lead length resistance

when using a 2-wire RTD. That resistance, when added to the RTD element

resistance, will result in erroneous input to the instrument. To overcome

this problem, use a 3-wire RTD sensor, which compensates for lead length

resistance. When extension wire is used for a 3-wire RTD, all wires must

have the same electrical resistance (i.e. same gauge, same length, multiple-

stranded or solid, same metal.

Figure 6c – Process,4-20mA Figure 6d – Process,0-5VÎ (dc)

Input impedance: 5Ω Input impedance: 10kΩ

DIP Switch

Orientation

DIP Switch

Orientation

1: ON

2: ON

PROC

OFF

1 2

OFF

1 2

- 4

+ 6

PROC

DIP Switch

Orientation

1: ON

2: ON

DIP Switch

Orientation

OFF

1 2

OFF

1 2

2-wire RTD

Jumper Terminals 5 & 6

(customer supplied)

DIP Switch

Orientation

DIP Switch

Orientation

1: OFF

2: OFF

RTD

OFF

1 2

OFF

1 2

OFF

1 2

3-wire

RTD

DIP Switch

Orientation

DIP Switch

Orientation

1: OFF

2: OFF

RTD

OFF

1 2

DIP Switch

Orientation

T/C

DIP Switch

Orientation

1: OFF

2: ON

OFF

1 2

OFF

1 2

NOTE:

Successful installa-

tion requires five

steps:

• Choose the con-

troller’s hardware

configuration and

model number;

• Choose a sensor;

• Install the con-

troller;

• Wire the controller

and

• Configure the con-

troller.

WARNING:

To avoid damage to

property and equip-

ment and/or injury or

loss of life, use

National Electric

Code (NEC) standard

wiring practices to

install and operate

this unit. Failure to

do so could result in

injury and/or death,

or such damage.

NOTE: When an

external device with a

non-isolated circuit

common is connect-

ed to the 4-20mA or

dc output, you must

use an isolated or

ungrounded thermo-

couple.

CAUTION: Process

input does not have

sensor break protec-

tion. Outputs can

remain full on.

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Watlow Series V4T Manuel d'utilisateur Page 6

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