Honeywell 8C-PAIH51 Analog Input Module HART

Product Introduction

The 8C-PAIH51 belongs to the Honeywell 8C Series I/O family. This analog input module collects high-level current signals from transmitters and sensing devices in industrial process control systems. Specifically, it supports HART-capable multivariable instruments and multiple modems for fast collection of control variables.

Additionally, the module delivers non-incendive field power without external user-supplied power. Therefore, no external marshalling is required to support the 4-20mA loop. This design simplifies wiring and reduces cabinet space. The 8C-PAIH51 suits Division 2 hazardous area applications that require non-incendive protection ratings.

Technical Specifications

The Honeywell 8C-PAIH51 offers 16 single-ended input channels. Each channel accepts current inputs from 2-wire or self-powered transmitters. The A/D converter provides 16-bit resolution across the 4-20 mA range through a 200 Ω sense resistor.

Key electrical parameters include:

• Input Range: 4-20 mA (through 200 Ω)

• A/D Resolution: 16 bits

• Maximum Input Voltage: ±30 V (any input referenced to common, no damage)

• Input Scan Rate: 50 ms

• Hardware Accuracy: ±0.075% of full-scale at 23.5°C ±2°C; ±0.15% of full-scale from 0 to 60°C

• Normal Mode Rejection Ratio at 60 Hz: 19 dB

• Normal Mode Filter Response: Single-pole RC, -3 dB @ 6.5 Hz

• Crosstalk (dc to 60 Hz, channel-to-channel): -60 dB

Furthermore, the module includes individually protected current limiting circuits for Class 1, Division 2 non-incendive interfacing. No fusing is required. Besides, the design supports optional redundancy for critical loops.

Mechanical and Environmental Parameters

The module operates within a standard 8C Series I/O chassis slot. Meanwhile, the compact form factor allows dense channel counts per rack. The operating temperature range covers 0 to 60°C with the accuracy figures stated above. Storage and transport conditions follow Honeywell 8C Series system guidelines.

Installation Guide

First, verify that the chassis power is off before inserting the 8C-PAIH51 module. Next, align the module with the slot guides and seat it firmly into the backplane connector. After that, tighten the captive screws to secure the module.

For field wiring, connect the 4-20mA loop leads to the corresponding channel terminals. The module supplies non-incendive field power internally, so no external power supply is needed for the loop. Additionally, observe Division 2 wiring practices for hazardous area installations.

Finally, power up the chassis and verify channel readings through the control system. The fast 50 ms scan rate enables responsive loop monitoring. Moreover, self-diagnostics help identify channel faults during commissioning.

Packaging List

• 1 × Honeywell 8C-PAIH51 Analog Input Module

• 1 × Anti-static protective bag

• 1 × Carton packaging

FAQ

Q1: What input types does the 8C-PAIH51 accept?
A: The module accepts 4-20 mA current inputs from two-wire or self-powered transmitters. It provides 16 single-ended channels through a 200 Ω sense resistor.

Q2: Does the 8C-PAIH51 support HART communication?
A: Yes. The module is HART-capable and supports multivariable instruments with multiple modems for fast collection of control variables.

Q3: What is the input scan rate of this module?
A: The 8C-PAIH51 offers a fast loop scan rate of 50 ms. This supports responsive monitoring of critical process variables.

Q4: Does the module require external field power?
A: No. The module supplies non-incendive field power internally. No external user-supplied power or external marshalling is required for the 4-20mA loop.

Q5: How is the module shipped?
A: We ship via Fedex, UPS, and DHL. Each unit arrives in anti-static packaging inside a protective carton.