User`s manual

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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 inductive
loads (relay coils, solenoids,
etc.) with the mechanical relay
or solid-state relay output op-
tions requires use of an R.C.
suppressor.
Watlow carries the R.C. sup-
pressor Quencharc brand name,
which is a trademark of ITW
Paktron. Watlow Part No. 0804-
0147-0000.
Note: To prevent ground loops,
isolation needs to be maintained
from input to output when using
switched DC or analog process
outputs.
Figure 17a — Output 3 Open Collector
SD_ _ - _ _ _ C - _ _ _ _
• Maximum current sink 250 mAÎ (dc).
• Maximum supply voltage 42VÎ (dc).
• For inductive loads, see Quencharc note.
• Output does not supply power.
Figure 17b — Output 3 Process
SD_ _ - _ _ _ 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.
12 amps +
13 volts +
14 com -
12
13
14
Internal Circuitry
dc-
COM.
dc+
42VÎ (dc) maximum
Open Collector
12
13
14
Load
-
+
Power
Supply
-
+
Class 2 power source
required for agency
compliance.
13 open collector
14 common
12
13
14
12 dc+
Watlow Series SD ■ 17 ■ Chapter 2 Install and Wire