RTD Input Module | PN: 1746-NRxx

Attribute	1746-NR4	1746-NR8
Backplane current (mA) @ 5 V	50 mA	100 mA
Backplane current (mA) @ 24V	50 mA	55 mA
Number of inputs	4	8
Input type	100 Ω Platinum (385) 200 Ω Platinum (385) 500 Ω Platinum (385) 1000 Ω Platinum (385) 100 Ω Platinum (3916) 200 Ω Platinum (3916) 500 Ω Platinum (3916) 1000 Ω Platinum (3916) 10 Ω Copper (426) 120 Ω Nickel (618) 120 Ω Nickel (672) 604 Ω Nickel-Iron (518) 150 Ω Resistance Input 500 Ω Resistance Input 1000 Ω Resistance Input 3000 Ω Resistance Input	100 Ω Platinum (385) 200 Ω Platinum (385) 500 Ω Platinum (385) 1000 Ω Platinum (385) 100 Ω Platinum (3916) 200 Ω Platinum (3916) 500 Ω Platinum (3916) 1000 Ω Platinum (3916) 10 Ω Copper (426) 120 Ω Nickel (618) 120 Ω Nickel (672) 604 Ω Nickel-Iron (518) 150 Ω Resistance Input 500 Ω Resistance Input 1000 Ω Resistance Input 3000 Ω Resistance Input
Temperature scale (selectable)	1 °C or 1 °F and 0.1 °C and 0.1 °F	1 °C or 1 °F and 0.1 °C and 0.1 °F
Resistance scale (selectable)	1 or 0.1 Ω for all resistance ranges; or 0.1 Ω or 0.01 Ω for 150 Ω potentiometer	1 or 0.1 Ω for all resistance ranges; or 0.1 Ω or 0.01 Ω for 150 Ω potentiometer
Filter frequency (selectable filter)	10 Hz 50 Hz 60 Hz 250 Hz	28 Hz 50/60 Hz 800 Hz 6400 Hz
RTD excitation current (Two current values are user-selectable)	0.5 mA 2.0 mA	0.25 mA 1.0 mA
Open-circuit or short-circuit detection	Zero, upscale or downscale	Zero, upscale or downscale
Maximum cable impedance	25 Ω maximum per 308.4 m (1000 ft)	25 Ω maximum per 308.4 m (1000 ft)
Data formats	Raw/Proportional, Engineering Units, Engineering Units x 10, Scaled-for-PID	Raw/Proportional, Engineering Units, Engineering Units x 10, Scaled-for-PID
Calibration	Autocalibration at powerup and when a channel is enabled	Autocalibration at powerup and user-enabled periodic calibration
Isolation voltage, channel-to-channel	None	±5V
Isolation voltage, input to backplane	500V AC for 1 minute	500V AC for 1 minute
Common mode voltage separation	±1V maximum	±1V maximum