Watlow Series 146 - Manual (Page 3)

120VÅ 146_ - 1 _ _ _ - 0000
230 to 240 VÅ 146_ - 2 _ _ _ - 0000
24VÅ 146_ - 3 _ _ _ - 0000
NOTE: The line voltage is specified by your model number.
ç 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. All wiring and fusing must conform to the National Electric
Code and to any locally applicable codes. Failure to comply with
these recommendations could result in damage to equipment and
property, and injury to personnel.
ç WARNING: The Series 146 safety limit should be mounted in an
inconspicuous location to discourage unauthorized changes to the
set point. Only approved and appropriate personnel should have the
authority to change the set point on the limit switch. Failure to com-
ply with these recommendations could result in damage to equip-
ment and property, and injury to personnel.
ç CAUTION: Applying incorrect voltage may result in irreversible
damage to the controller.
Figure 3a — Power wiring.
15
L1
Fuse
L2
1 3
Recommended
fuse size: 1A
Power Disconnect
Switch
Power Wiring
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
8A 146E - _ _ _ _ - _ 000
ç
Figure 3d — Electromechanical relay wiring.
Figure 3e — Remote reset wiring.
NOTE: The Series 146 used with a
remote reset may affect FM recogni-
tion. Only the use of a momentary
switch is valid for approval.
NOTE: Reset is customer-supplied.
15 16 17 14 13
Customer-Supplied
Reset
Remote Reset
NOTE: Switching induc-
tive loads (relay coils,
solenoids, etc.) with the
mechanical 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.
15
L1
Fuse
Customer
Supplied
Quencharc L2
5
NC
External
Device
High
Temperature
Light
NO
7
C
9
Output Wiring
10 11 12
S1
S2
S3
3-wire RTD
10 11
S1
S2
S3
12
2-wire RTD
+ –
10 11
Input Wiring
3 ■ Watlow Series 146 User’s Manual