Watlow CLS200 - Current Inputs to Four-Loop and Eight-Loop Controllers; Voltage Inputs to Four-Loop and Eight-Loop Controllers

CLS200 Series User’s Guide
Chapter 8: Troubleshooting and Reconfiguring
155
Figure 8.9 shows the input circuit for one differential, analog input. See Current Inputs to Four-Loop
and Eight-Loop Controllers on page 155 through RTDs and Thermistor Inputs to Four-Loop and
Eight-Loop Controllers on page 156 for resistor values for voltage, current and RTD inputs.
Current Inputs to Four-Loop and Eight-Loop Controllers
Each current input has a 3.0Ω resistor in the resistor pack (RP) location for the input. Resistor pack
locations have three through holes. Resistors are installed as shown in the illustration below.
Table 8.6 — Resistor Values for Current Inputs to Four-Loop and Eight-Loop Controllers
INPUT RANGE RESISTOR VALUE RD
0 to 20mA 3.0Ω
Resistor tolerance: ±0.1%
RP#
RD
Table 8.7 — Resistor Locations for Current Inputs to Four-Loop and Eight-Loop Controllers
LOOP RESISTOR LOCATION RD LOOP RESISTOR LOCATION RD
1 RP1 5 RP5
2 RP2 6 RP6
3 RP3 7 RP7
4 RP4 8 RP8
Voltage Inputs to Four-Loop and Eight-Loop Controllers
Each voltage input uses two scaling resistors one at the resistor pack (RP) and one at RC for the
input. The values of the resistors determines the input range. Resistor pack locations have three
pads. Resistors are installed as shown in the illustration below.
Table 8.8 — Resistor Values for Voltage Inputs to Four-Loop and Eight-Loop Controllers
RESISTOR VALUES
INPUT RANGE RC RD
0 to 5VDC 39.2Ω 475.0Ω
0 to 10VDC 49.9Ω 301.0Ω
Resistor tolerance: ±0.1%
RP#
RD