8C-PAIHA1 51454470-275 Honeywell Series 8 HART Analog Input Module

The Honeywell 8C-PAIHA1 51454470-275 is a 16-channel analog input module with HART support and single-ended inputs. It receives current signals from transmitters and sensing devices, converting them into digital values for use by the control system. The module supports 4-20 mA inputs and provides access to HART device data for status, configuration, and process variable monitoring.

Signal Acquisition and HART Communication

The module accepts 4-20 mA current signals through a 250 ohm input resistance. Its 16-bit analog-to-digital converter converts incoming signals into digital measurements, while the 50 ms input scan rate defines the stated interval for input scanning.

HART communication adds digital device information alongside the analog current signal. This information can support device status checks and configuration tasks. Secondary and tertiary HART variables may also serve as process control variables when supported by the device configuration and control system.

Technical Specifications

Configuration and Selection Notes

The 8C-PAIHA1 combines single-ended current input acquisition with HART communication. When selecting a replacement or spare, verify the full model number and spare part number against the installed hardware and system configuration. Confirm that the field transmitter uses a compatible 4-20 mA signal and that the required HART variables are supported by the intended application.

The 250 ohm input resistance is relevant when checking the current loop’s voltage requirements. The available loop voltage must accommodate the input resistance and other loop components while remaining within the transmitter’s operating limits.

Frequently Asked Questions

Q: How many input channels does the Honeywell 8C-PAIHA1 provide?

A: It provides 16 single-ended current input channels, with a specified input range of 4-20 mA.

Q: What is the purpose of HART support on this module?

A: HART provides digital information from compatible field devices in addition to the analog current signal. Depending on device and system configuration, this information can support status monitoring, configuration, and the use of secondary or tertiary variables in process control.

Q: Is the 8C-PAIHA1 a coated module?

A: Yes. The supplied product information identifies it as a coated module. Confirm the required hardware configuration and full part number before ordering a replacement.