Watlow Series PD Ethernet Enabled Temperature and Process Controller - Manual (Page 19)

W a t l o w S e r i e s P D
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17
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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: 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 k
Ω
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
23
24
N.C. 22
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
19
21
20
Load
-
+
Power
Supply
- +
Class 2 power source
required for agency
compliance.
19 20 21
21 DC -
19 DC +
20 com