Watlow Series PD Ethernet Enabled Temperature and Process Manual do Utilizador descarregar pdf (Página 11)

Watlow Series PD ■ 9 ■ Chapter 2 Install and Wire

Warning:

Use National Electric (NEC) or

other country-specific standard

wiring and safety practices when

wiring and connecting this con-

troller to a power source and to

electrical sensors or peripheral

devices. Failure to do so may re-

sult in damage to equipment and

property, and/or injury or loss of

life.

WARNING: Process input may

not have sensor break protec-

tion. Outputs can remain full on.

Note: Install a 1kΩ pull-down

resistor for each digital in-

put using voltage inputs.

Note: Install a 10kΩ pull-up re-

sistor for each digital input

using contact closure in-

puts.

Figure 9a — Input 1, 0 to 20 mA Process Input

(all model numbers)

• Input impedance 100 Ω, dc only

• Controller does not supply power for the current loop

Figure 9b — Input 2, 0 to 20 mA Process Input

PDD _-_ _ _ _-_ _ _

• Input impedance 100 Ω, dc only

• Controller does not supply power for the current loop

• Input 2 isolated from Input 1

Dual Digital Inputs

PD_ 1-_ _ _ _-_ _ _

• Input impedance 10kΩ, dc only

• Input 2 isolated from Input 1

Figure 9c — Voltage input

0-1VÎ (dc) Event Input Low State

2-36VÎ (dc) Event Input High State

Figure 9d — Contact closure

0-2kΩ Event Input Low State

> 7kΩ Event Input High State

1 2 3 4

+5V‡ (dc)

Digital Common

Digital Input 1

Digital Input 2

10kΩ 10kΩ

Add a 10kΩ pull

up resistor for each

active input

1 2 3 4

Digital Common

Digital Input 1 +

Digital Input 2 +

1kΩ

Add a 1kΩ pull

down resistor for

each active input

5 6 7 8

9 10 11 12

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 29 30

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