Micromod MOD: MODCELL Multiloop Processor 2002N Model C and Associated Hardware - Manual (Page 43)

MODCELL Multiloop Processor
ELECTRICAL CONNECTIONS
3.5.6 2009A RTD Input (RIM, WRIM)
Make resistance input connections to terminal block as shown in Figure 3-8. The 2 wire
input module (RIM) uses a single wide case and the 3 wire input module (WRIM) uses a
double wide case. Table 3-2 summarizes the RTD support standards and shows some
sample RTDs.
Table 3-2. Supported RTD Materials and Standards and Sample RTDs
1. Also meets IEC 751 and BS 1904 Standards.
2. Sometimes called U.S. Industrial Standard.
Sample RTDs and Appropriate Module
ohms
@ 0°C
Approx. ohm
Range
RTD Module
Supported RTD Materials and Standards
Material
Alpha
(ohm/ohm/°C)
Standard
1000 184.94 to 3902.61 2 Wire Platinum 0.003850 DIN 43760 (Note 1)
500 92.47 to 1951.31 2 Wire Platinum 0.003850 DIN 43760 (Note 1)
1000 555.00 to 3169.25 2 Wire Nickel 0.006720 Minco (Note 2)
100 18.49 to 390.26 3 Wire Platinum 0.003850 DIN 43760 (Note 1)
98.129 16.66 to 311.87 3 Wire Platinum 0.003923 SAMA RC21-4
100 17.07 to 332.62 3 Wire Platinum 0.003902 Burns
100 17.26 to 403.70 3 Wire Platinum 0.003911 Minco (Note 2)
120 66.60 to 380.31 3 Wire Nickel 0.006720 Minco (Note 2)
Input specifications for the 2 wire and the 3 wire input modules are:
RTD INPUT
Range (0 t o100%):
2 Wire: 0 to 4000 Ohms
3 Wire: 0 to 400 Ohms
Low limit: 0 Ohms
High limit:
2 Wire: 4200 Ohms
3 Wire: 400 Ohms
Module Counts (0 to 100%): –25000 to 25000 (converted to 0 to 50000 in controller)
Sensitivity (One Count)
2 Wire: 0.08 Ohms
3 Wire: 0.008 Ohms
Accuracy, calibrated at 5V supply and 25°C: ±0.05% of Range
(This equals an absolute accuracy of ±25 counts or ±2 ohms for the 2 wire input or
±0.2 ohms for the 3 wire input or ±0.519°C for the Platinum DIN 43760 curve)
Temperature Effect (0 deg C to 50 deg C): 0.1% of Range
Noise filter: 3 db at 5 Hz
Max Resistance Each Lead: 100 Ohms
Excitation Current (maximum)
2 Wire: 0.25 mA
3 Wire: 0.6 mA
Burnout Detection on all leads: Upscale
Isolation: 250 Vrms
Common mode rejection: 100 db at 60 Hz minimum
Normal mode rejection: 40 db at 60 Hz minimum
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