Watlow Series 147 - Manual (Page 5)

5 ■ Watlow Series 147 User’s Manual
Thermocouple
Figure 5a — Thermocouple wiring.
2- and 3-wire RTD
Figure 5b — 2- and 3-wire RTD wiring.
NOTE: 2- or 3-wire RTD input, platinum 100 Ω @ 0°C calibrated for
0.003850
Ω
/
Ω
°C curve.
Electromechanical Relay, Form C
8A 147E - _ _ _ _ - _ _ 00
Figure 5c — Electromechanical relay wiring.
Figure 5d — Reset wiring.
NOTE: Only the use of a momentary switch is valid for FM approval.
NOTE: Reset is customer-supplied.
Customer-Supplied
Reset
00
50
100
150
200
250 300
350
400
450
500
Remote Reset
ç
NOTE: Switching inductive 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.
00
50
100
150
200
250 300
350
400
450
500
External
Device
Fuse
L1
L2
NC NO C
Customer Supplied
Quencharc
Output Wiring
00
50
100
150
200
250 300
350
400
450
500
S1
S2
S3
3-wire RTD
00
50
100
150
200
250 300
350
400
450
500
S1
S2
S3
2-wire RTD
TC- TC+
00
50
100
150
200
250 300
350
400
450
500
Input Wiring