Specifications

Publication 1747-SG001E-EN-E - February 2013
28 Select SLC 500 I/O Modules
Isolation voltage, channel-to-channel None ±5V
Isolation voltage, input to backplane 500V AC for 1 minute
Common mode voltage separation ±1V maximum
(1) Cannot use for 10 Ω Copper RTD. Recommended for use with higher resistance ranges for both RTDs and direct response inputs (1000 Ω RTDs and 3000 Ω resistance
input). Contact the RTD manufacturer for recommendations.
(2) Must use for 10 Ω Copper RTD. Recommended for use with all other RTD and direct resistance inputs, except 1000 Ω RTDs and 3000 Ω resistance ranges. Contact RTD
manufacturer for recommendations.
RTD/Resistance Input Modules
Attribute 1746-NR4 1746-NR8
RTD Channel Step Response for 1746-NR4 and 1746-NR8
1746-NR4 1746-NR8
Filter
Frequency
50 Hz
NMR
60 Hz
NMR
Cut-off
Frequency
Step
Response
Filter
Frequency
50 Hz
NMR
60 Hz
NMR
Cut-off
Frequency
Step
Response
10 Hz 100 dB 2.62 Hz 300 ms 28 Hz 110 dB 95 dB 7.8 Hz 120 ms
50 Hz 100 dB – 13.1 Hz 60 ms 50/60 Hz 65 dB 13.65 Hz 68.6 ms
60 Hz – 100 dB 15.72 Hz 50 ms 800 Hz – – 209.8 Hz 3.75 ms
250 Hz – – 65.5 Hz 12 ms 6400 Hz – – 1677 Hz 1.47 ms
Update Time for 1746-NR4 and 1746-NR8
1746-NR4 1746-NR8
Filter Frequency
Channel Scan Time
(1)
Filter Frequency Channel Scan Time With Lead Resistance
Measurement
10 Hz 305 ms 28 Hz 125 ms 250 ms
50 Hz 65 ms 50/60 Hz 75 ms 147 ms
60 Hz 55 ms 800 Hz 10 ms 18 ms
250 Hz 17 ms 6400 Hz 6 ms 10 ms
(1) The module-scan time is obtained by summing the channel-scan time for each enabled channel. For example, if 3 channels are enabled and the 50 Hz filter is selected, the
module-scan time is 3 x 65 ms = 195 ms.
RTD Temperature Range and Accuracy Specifications
RTD Type 1746-NR4 1746-NR8
0.5 mA Excitation 2.0 mA Excitation 0.25 mA Excitation 1.0 mA Excitation
Temp. Range
Accuracy
(1)
Temp. Range
Accuracy
(1)
Temp. Range
Accuracy
(1)
Temp. Range
Accuracy
(1)
Platinum
(385)
100 Ω -200…850 °C
-328…1562 °F
±1.0 °C
(2)
±2.0 °F
-200…850 °C
-328…1562 °F
±0.5 °C
±0.9 °F
-200…850 °C
-328…1562 °F
±0.5 °C
±0.9 °F
-200…850 °C
-328…1562 °F
±0.7 °C
±1.3 °F
200 Ω -200…850 °C
-328…1562 °F
±1.0 °C
(2)
±2.0 °F
-200…850 °C
-328…1562 °F
±0.5 °C
±0.9 °F
-200…850 °C
-328…1562 °F
±0.6 °C
±1.1 °F
-200…850 °C
-328…1562 °F
±0.7 °C
±1.3 °F
500 Ω -200…850 °C
-328…1562 °F
±0.6 °C
±1.1 °F
-200…850 °C
-328…1562 °F
±0.5 °C
±0.9 °F
-200…850 °C
-328…1562 °F
±0.7 °C
±1.3 °F
-200…370 °C
-328…698 °F
±0.5 °C
±0.9 °F
1000 Ω -200…850 °C
-328…1562 °F
±0.6 °C
±1.1 °F
-200…240 °C
-328…464 °F
±0.5 °C
±0.9 °F
-200…850 °C
-328…1562 °F
±1.2 °C
±2.2 °F
-200…50 °C
-328…122 °F
±0.4 °C
±0.7 °F