The Allen-Bradley 1762-IR4 is an Allen-Bradley analog input module that is specifically made to interface Resistance Temperature Detectors (RTD) and Resistance generating devices. This module is suitable for use in Temperature applications as RTD are instruments that measure temperature by generating a specific resistance output as a certain temperature. Additionally, this module may also be used to monitor displacement or measure displacement of devices. Devices such as cylinders, clamping devices and many others.

This module is compatible for a variety of RTD types. Specifically, compatible RTD sensors include 100? Platinum 385, 200? Platinum 385, 500? Platinum 385 ,1000? Platinum 385, 100? Platinum 3916, 200? Platinum 3916, 500? Platinum 3916, 1000? Platinum 3916, 10? Copper 426, 120? Nickel 672, 120? Nickel 618 and 604? Nickel-Iron 518 RTD. These RTDs may be 2-Wire, 3-Wire or 4-Wire RTDs. If used with resistance generating devices, this module accepts resistance ranges of 0 to 150?, 0 to 500?, 0 to 1000? and 0 to 3000?.

The received analog value from the individual channels is converted and saved to a register which may be formatted as raw/proportional, engineering units x 1, engineering units x 10, scaled-for-PID and percent full scale. Input filters may be used to filter noises for conditioning of the input signal.

This module is compatible expansion module of MicroLogix 1100, 1200 and 1400. The number of instance of this module depends on the MicroLogix controller used.

The 1762-IR4 is an Allen-Bradley MicroLogix expansion module. This module has Four (4) channel RTD/resistance input module. It enhances the functionality of MicroLogix 1100 / 1200 / 1400 controllers.

The 1762-IR4 has a dimension of 90 x 87 x 40 mm. The analog input data is converted via Delta-Sigma conversion. The module’s heat dissipation is 1.5 Watts and requires minimum mounting space. The module’ installation could be either DIN rail or panel mounted. It is compatible with various RTDs (Resistance Temperature Detectors) and Resistance devices.

The 1762-IR4 module has a single diagnostic LED that indicates both status and power and helps identify the source of all problems. The module communicates and receives 5V and 24V DC power via the 1762 bus interface. It auto-calibrates on the channel enable but the user can also program it to calibrate every 5 minutes. For wiring the input terminal blocks, a finger-safe cover is present. The 1762-IR4 module can be connected to three types of RTDs i.e., 2-wire, 3-wire, and 4-wire and 2 types of resistance devices i.e. 2-wire and 3-wire. It uses 6 input words and 5 configuration words. The operation details must be configured for each channel after module installation. The module update time is fastest when only 1 input channel is connected to 1 kHz filter and slowest when all 6 input channels are connected to 10 Hz filter. With an increase in autocalibration and lead wire compensation cycles, the module update time also increases.

For safety, while troubleshooting, always stands away from the equipment and always check for any program change. The safety circuits should always be wired in series to the master relay. It should be installed in non-hazardous, dry, and clean environments away from any electrical noise and heat. The 1762-IR4 module performs both module and channel diagnostics.