Input specifications – Spectrum Controls 1762sc-IF8U User Manual
Page 31

Appendix A: Specifications
A-3
User's Manual Pub. 0300243‐02 Rev. B
Input Specifications
Specification
Value
Number of Inputs
8 Current/Voltage or 4 Resistance
A/D Converter Type
Delta Sigma
Common Mode Rejection
100 dB for 4 Hz & 17 Hz Filters
Normal Mode Rejection
4 Hz Filter
74dB minimum at
50 and 60 Hz
17 Hz Filter
65dB minimum at
50 and 60 Hz
62 Hz Filter
First notch at
31Hz, typically
30dB
470 Hz Filter
First notch at 237
Hz, typically 35dB
Non-linearity (in percent full
scale)
±0.1%
Input Impedance
Current Terminal: 249Ω
Current Input Protection
±42 mA
Voltage Input Protection
±28 V
13
RTD/resistance Excitation
Current
Current in mA
100 Ω Pt α385
200
Ω Pt α385
500
Ω Pt α385
1000
Ω Pt α385
100
Ω Pt α3916
200
Ω Pt α3916
500
Ω Pt α3916
1000
Ω Pt α3916
10
Ω Cu α426
100
Ω Ni α618
120
Ω Ni α672
604
Ω NiFe α518
0 to 150 Ω
0 to 1000 Ω
0 to 3000 Ω
0.42
0.42
0.21
0.21
1.00
0.42
0.21
0.21
2.00
1.00
1.00
0.21
0.42
0.21
0.21
13
The maximum allowable voltage difference between any two input pins is 28V.