Watlow Series 988LF Manual de usuario descargar pdf (Pagina 18)

2.8 WATLOW Series 988LF User’s Manual

Installation and Wiring, Chapter 2

Figure 2.8d —

0-20mA or 4-20mA Process

Universal signal conditioner

98 _ L - _ 2 _ _ - A A _ _

Input impedance: 7Ω

Remote Set Point Option

Figure 2.8c —

0-5V

ÎÎ

, 1-5V

ÎÎ

or 0-10V

ÎÎ

(dc) Process

Universal signal conditioner

98 _ L - _ 2 _ _ - A A _ _

Input impedance: 10KΩ

Remote Set Point Option

Figure 2.8b — RTD (2 or 3 Wire) 100Ω

Universal signal conditioner

98 _ L - _ 2 _ _ - A A _ _

Remote Set Point Option

Figure 2.8a —

Thermocouple or 0-50mV (high impedance)

Universal signal conditioner

98 _ L - _ 2 _ _ - A A _ _

Input impedance: 20MΩ

Remote Set Point Option

Jumper

#19 to #20

for 2 wire

RTD

DIP Switch

Setting

R, S, B

DIP Settings

J, K, T, N, C, E, D, Pt2,

0-50mV DIP Settings

DIP Switch

Setting

↑

123

↑

123

↑

123

↑

123

DIP Switch

Setting

↑

123

0-50mV

NOTE:

Successful installa-

tion requires five

steps:

• Model number and

software choice

(Appendix);

• DIP switch set-

tings (Chapter 1);

• Sensor match

(Chapter 2 and

Appendix);

• Sensor installation

(Chapter 2); and

• Wiring (Chapter 2).

Input 2 Wiring

CAUTION:

An external resistor

is required for

0-20mA and 4-20mA

process wiring to

prevent a high in-

rush current which

could burn out the

controller’s 7-ohm

resistor. See page

2.4 for recommen-

dations.

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 63 64

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