Watlow Series PD Ethernet Enabled Temperature and Process Manuale Utente Scaricare il pdf (Pagina 20)

Watlow Series PD ■ 18 ■ 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.

Figure 18a — Output 4 Solid-state Relay

PD_ _ - _ _ _ K - _ _ _ _

• Form A.contact

• 0.5 A, resistive

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

• 24 to 240VÅ (ac)

• See Quencharc note

• Minimum load current 10mA

• Maximum leakage current 100µA

• Not for use with direct current (dc)

• Output does not supply power

Figure 18b — Output 4 Switched DC

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

• Maximum supply current 30 mAÎ (dc)

• Supply voltage 24VÎ (dc)

• Not recommended for switching mechanical relays

• Output supplies power

Figure 18c — Output 4 Open Collector

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

• Maximum current sink 250 mAÎ (dc)

• Maximum supply voltage 42VÎ (dc)

• Output does not supply power

Internal Circuitry

dc-

COM.

dc+

42VÎ (dc) maximum

Open Collector

Load

Power

Supply

Class 2 power source

required for agency

compliance.

22 23 24

24 dc -

22 dc +

23 com

Internal Circuitry

dc-

dc+

24VÎ (dc)

Load

Switched DC

22 23 24

24 dc -

22 dc +

23 com

Internal Circuitry

COM.

N.O.

Solid-state Relay

Solid-state Switch

22 23 24

24 normally open

23 com

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 29 30

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