Watlow CLS200 - RTDs and Thermistor Inputs to Four-Loop and Eight-Loop Controllers

CLS200 Series User’s Guide
Chapter 8: Troubleshooting and Reconfiguring
156
Table 8.9 — Resistor Locations for Voltage Inputs to Four-Loop and Eight-Loop Controllers
RESISTOR LOCATIONS
LOOP RC RD
1 R58 RP1
2 R56 RP2
3 R54 RP3
4 R52 RP4
5 R50 RP5
6 R48 RP6
7 R46 RP7
8 R44 RP8
RTDs and Thermistor Inputs to Four-Loop and Eight-Loop Controllers
Each RTD or thermistor input has three scaling resistors installed: one each at RA, RB and RC for
the input. The values of the resistors determines the input range. RA and RB are a matched pair of
resistors installed in the resistor pack (RP) location as shown in the illustration below.
Table 8.10 — Resistor Values for RTD and Thermistor Inputs to Four-Loop and Eight-Loop Controllers
RESISTOR VALUES
INPUT RANGE RA/RB RC
RTD1 10.0kΩ 80Ω
RTD2 25.0kΩ 100Ω
Resistor tolerances: RA/RB 0.1% (10 ppm/°C) matched to 0.02% (2 ppm/°C) RC 0.05%.
RP#
RA RB
Table 8.11 — Resistor Locations for RTD and Thermistor Inputs to Four-Loop and Eight-Loop Controllers
RESISTOR LOCATIONS
LOOP RA/RB RC
1 RP1 R57
2 RP2 R55
3 RP3 R53
4 RP4 R51
5 RP5 R49
6 RP6 R47
7 RP7 R45
8 RP8 R43