Allen-Bradley MicroLogix 1200 User Manual page 79

Specification
Accuracy Drift at 0 to 55° C (+32 to
+131°F)
(1)
Repeatability
Excitation Current Source
(2)
Open-Circuit Detection Time
Channel Update Time
Input Channel Configuration
Calibration
Module OK LED
Channel Diagnostics
Maximum Overload at Input Terminals
Cable Impedance Max.
Input Impedance
Power Supply Distance Rating
Channel to Bus Isolation
Channel to Channel Isolation
Vendor I.D. Code
Product Type Code
Product Code
(1) Repeatability is the ability of the module to register the same reading in successive measurements for the same input signal.
(2) Open-circuit detection time is equal to channel update time.
1762-IR4
±0.026°C/°C (0.026°F/°F) for Pt 385
±0.023°C/°C (0.023°F/°F) for Pt 3916
±0.012°C/°C (0.012°F/°F) for Ni
±0.015°C/°C (0.015°F/°F) for NiFe
±0.032°C/°C (0.032°F/°F) for Cu
±0.1°C (±0.18°F) for Ni and NiFe
±0.2°C (±0.36°F) to ±0.2°C (±0.36°F) for other RTD inputs
±0.04Ω for 150Ω resistances
±0.2Ω for other resistances
0.5 mA and 1.0 mA selectable per channel
6 to 1212 ms
Input filter and configuration dependent.
Via configuration software screen or the user program (by writing a unique bit pattern into the
module's configuration file). Refer to your controller's user manual to determine if user program
configuration is supported.
The module performs autocalibration on channel enable and on a configuration change between
channels. You can also program the module to calibrate every five minutes.
On: module has power, has passed internal diagnostics, and is communicating over the bus.
Off: Any of the above is not true.
Over- or under-range or broken input by bit reporting
±35V dc continuous
25Ω (Operating with >25Ω will reduce accuracy.)
>10 MΩ
6 (The module may not be more than 6 modules away from the system power supply.)
500V ac or 707V dc for 1 minute (type test)
30V ac/30V dc working voltage (IEC Class 2 reinforced insulation)
±10V dc
1
10
65
Specifications
±0.007Ω/°C (0.012Ω/°F) for 150Ω range
±0.023Ω/°C (0.041Ω/°F) for 500Ω range
±0.043Ω/°C (0.077Ω/°F) for 1000Ω range
±0.072Ω/°C (0.130Ω/°F) for 3000Ω range
Publication 1762-UM003A-EN-P - February 2003
A-3