
CPC400 Series User’s Guide Chapter 6: Troubleshooting and Reconfiguring
Doc. 0600-2900-2000 Watlow Anafaze 161
RTD Inputs
For each RTD input, you must install three resistors: RA,
RB, and RC. The resistance must be correct for the expect-
ed input range. RA and RB are a matched pair of resistors.
Install them in the resistor pack (RP) locations as shown in
the illustration below.
Resistor values:
• RA/RB: 25 kΩ
• RC: 18.2 Ω
Resistor tolerances:
• RA/RB: Matched to 0.02% (±5 ppm/˚C) with absolute
tolerance of 0.1% (±25 ppm/˚C)
• RC: Accurate to 0.05% (±5ppm/˚C)
Table 6.7 Resistor Locations for RTD Inputs
Loop
Resistor Locations
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
RP#
RA RB
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