Watlow Series PD Ethernet Enabled Temperature and Process Controller - Manual (Page 18)

W a t l o w S e r i e s P D
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16
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C h a p t e r 2 I n s t a l l a n d W i r e
ç
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 16a — Output 3 Mechanical Relay
PD_ _ - _ _ J _ - _ _ _ _
• Form A contact
• 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
Figure 16b — Output 3 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 10 mA
• Maximum leakage current 100 µA
• Not for use with direct current (dc)
• Output does not supply power
Figure 16c — Output 3 Switched DC
PD_ _ - _ _ C _ - _ _ _ _
• Maximum supply current 30 mAÎ (dc)
• Supply voltage 24VÎ (dc)
• Not for switching mechanical relays
• Output supplies power
Internal Circuitry
dc-
dc+
24VÎ (dc)
Load
Switched DC
-
+
19
21
19 20 21
21 DC -
19 DC +
20 com
Internal Circuitry
COM.
N.O.
Solid-state Relay
20
21
Solid-state Switch
19 20 21
21 normally open
20 com
Internal Circuitry
COM.
N.O.
Mechanical Relay
20
21
19 20 21
21 normally open
20 com