Watlow Series 103 - Manual (Page 3)

Thermocouple
Figure 3b — Thermocouple wiring.
2- and 3-wire RTD
Figure 3c — 2- and 3-wire RTD wiring.
NOTE: 2- or 3-wire RTD input, calibrated for 0.003850 Ω / Ω °C curve.
Electromechanical Relay, Form C without contact suppression
10A 103 E - _ _ _ _ - _ 000
Solid-State Relay, Form A, 0.5A without contact suppression
5A 103 K - _ _ _ _ - _ 000
Figure 3d — Electromechanical and solid-state relay wiring.
NOTE: Switching inductive loads (relay coils, solenoids, etc.) with the mechan-
ical relay, switched dc or solid-state relay output options requires use of an
R.C. Suppressor. Watlow carries the R.C. suppressor Quencharc brand name,
which is a trademark of ITW Paktron. Watlow Part No. 0804-0147-0000.
Switched DC
103 C - _ _ _ _ - _ 000
Figure 3e — Switched dc
5 7 6
External
Device
dc - dc+
dc-
Internal Circuitry
dc+
620 Ω
V+
24V Î
Unregulated
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NOTE: We strongly recommend
that all control loops use an
approved temperature limit for
over or under temperature limit
protection.
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WARNING: Failure to install a
temperature limit for protection
where a potential hazard exists
could result in damage to equip-
ment and property wiring and
injury to personnel.
L1
Fuse
L2
5
NC
External
Device
NO
7
C
9
Output Wiring
10 11 12
S1
S2 S3
3-wire RTD
10 11
S1 S2
S3
12
2-wire RTD
TC+
TC-
10 11
Input Wiring
3 ■ Watlow Series 103 User’s Manual
120VÅ 103_ - 1 _ _ _ - 0000
230 to 240VÅ 103_ - 2 _ _ _ - 0000
NOTE: The line voltage is specified by your model number.
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WARNING: To avoid potential electric shock, use National Electrical
Code safety practices when wiring and connecting this unit to a
power source and to electrical sensors or peripheral devices.
Failure to do so could result in injury or death.
All wiring and fusing must conform to the National Electric
Code and to any locally applicable codes.
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CAUTION: Applying incorrect voltage may result in irreversible
damage to the control.
Figure 3a — Power wiring.
15
L1
Fuse
L2
1 3
Recommended
fuse size: 1A
Power Wiring