Watlow Series PD Ethernet Enabled Temperature and Process Manual do Utilizador descarregar pdf (Página 19)

Watlow Series PD ■ 17 ■ 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.

Quencharc Note:

Switching pilot duty loads (relay

coils, solenoids, etc.) with the

mechanical relay or solid-state

relay output options requires use

of an R.C. suppressor.

Watlow carries the R.C. suppres-

sor Quencharc brand name,

which is a trademark of ITW

Paktron. Watlow Part No. 0804-

0147-0000.

Note: A current transformer input

is not available if Output 1 or 3

is a process output.

Figure 17a — Output 3 Open Collector

PD_ _ - _ _ C _ - _ _ _ _

• Maximum current sink 250 mAÎ (dc)

• Maximum supply voltage 42VÎ (dc)

• Output does not supply power

Figure 17b — Output 3 Process

PD_ _ - _ _ F _ - _ _ _ _

• Analog output scalable from 0 to 10VÎ (dc) or 0 to 20 mAÎ (dc)

• Load capability: voltage, 1 kΩ minimum; current, 800 Ω maximum

• Output supplies power

• Cannot use voltage and current output at the same time

Figure 17c — Output 4 Mechanical Relay

PD_ _ - _ _ _ E - _ _ _ _

• Form C.contacts

• 2 A, resistive

• 125 VA pilot duty, 120/240VÅ (ac), inductive

• 240VÅ (ac) maximum

• 30VÎ (dc) maximum.

• See Quencharc note

• For use with ac or dc

• Minimum load current: 10 mA

• Output does not supply power

Internal Circuitry

COM.

N.O.

Mechanical Relay

N.C.

22 23 24

24 normally open

23 com

22 normally closed

19 20 21

21 amps +

19 volts +

20 com -

Internal Circuitry

dc-

COM.

dc+

42VÎ (dc) maximum

Open Collector

Load

Power

Supply

Class 2 power source

required for agency

compliance.

19 20 21

21 DC -

19 DC +

20 com

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 29 30

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