Watlow Series PD - Manual (Page 20)

W a t l o w S e r i e s P D
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18
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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.
Note: 24 VЕ Е input power re-
quired to use single cycle,vari-
able time base output function.
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 200 mAÎ (dc)
• Maximum supply voltage 42VÎ (dc)
• Output does not supply power
Internal Circuitry
dc-
COM.
dc+
42VÎ (dc) maximum
Open Collector
22
24
23
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
24
22 23 24
24 dc -
22 dc +
23 com
Internal Circuitry
COM.
N.O.
Solid-state Relay
23
24
Solid-state Switch
22 23 24
24 normally open
23 com