Foxboro FBM214B HART Input Module 8-Channel

Foxboro FBM214B P0927AH 8-Channel HART Input Module

Product Introduction

The Foxboro FBM214B P0927AH is a reliable analog input module. It belongs to the Foxboro I/A Series. This module gives you eight isolated input channels. Each channel accepts a standard 4-20 mA signal. Additionally, it handles HART FSK digital communication.

You can use it with any mix of standard analog devices and HART instruments. It supports HART versions 5, 6, and 7. The module powers each channel individually with 24V DC. Therefore, you do not always need an external power supply.

This module improves system accuracy through sigma-delta conversion. It also blocks electrical noise between channels. As a result, it works well in harsh environments like Class G3 areas.

Key Technical Specifications

The FBM214B P0927AH offers high precision and strong isolation. Below are the main technical details.

Analog Input Channels

• Eight individually isolated channels

• 4-20 mA analog sensor signal

• HART FSK signal superimposed on 4-20 mA

Accuracy and Resolution

• Accuracy: ±0.03% of full scale

• Resolution: 15 bits

• Temperature coefficient: 50 ppm/ºC

Input Resistance

• Externally powered: 282 Ω

• Internally powered: 302 Ω

Update and Response

• Update rate: 100 ms

• Integration time: 500 ms

• Messages per second: 2

Loop Power Supply

• Per channel 24V DC ±10%

• Current limited to <37 mA

• Output impedance: 20 Ω including TA

Communication

• Point-to-point, half-duplex, 1200 baud

• Error checking: parity + CRC

• Maximum distance: up to 3030 m (10,000 ft)

Isolation and Protection

• Galvanic isolation per channel

• Common mode rejection: >100 dB at 50/60 Hz

• Normal mode rejection: >35 dB at 50/60 Hz

Mechanical and Environmental Ratings

The Foxboro FBM214B is built for demanding locations.

• Power input: 24V DC (+5%, -10%) redundant

• Power consumption: 7 W maximum

• Heat dissipation: 4 W maximum

• Operating environment: Suitable for Class G3 (harsh)

• EMC compliance: EN61326-1:2013 Class A

• RoHS: Compliant with 2011/65/EU

Fieldbus and System Compatibility

This module talks to the FCM or FCP over a redundant 2 Mbps module Fieldbus.

It works with:

• I/A Series software v8.2 to v8.8

• Control Core Services v9.0 or later

For external loop power shared across channels, you need a Cable Balun module to stop crosstalk.

Installation Guidelines

Installing the FBM214B P0927AH is straightforward. Follow these steps.

First, mount the module inside an approved Foxboro chassis. Next, connect the Termination Assembly (TA) for field wiring. The TA supports both local and remote connections.

For internally powered transmitters, use the built-in 24V loop supply. For externally powered loops, connect an external supply to the TA.

If you power two or more channels from one external supply, add a Cable Balun module. This prevents HART signal interference.

Finally, wire each field device to its assigned channel. Keep wiring tidy and away from high-voltage cables.

Packaging List

• FBM214B P0927AH module – 1 unit

• Termination Assembly (TA) – 1 unit

• Loop supply jumpers – 8 pieces

• Mounting screws – 4 pieces

• Quick start guide – 1 copy

Note: No certificates or warranty documents are included in this package.

Shipping and Logistics

We ship worldwide using trusted carriers.

• FedEx

• UPS

• DHL

All shipments are fully tracked. Proper anti-static packaging is used.

Frequently Asked Questions (FAQ)

1. Can the FBM214B P0927AH mix HART and non-HART devices on different channels?
Yes, you can. Each channel works independently. Some channels can run standard 4-20 mA devices. Others can run HART instruments at the same time.

2. Does this module support HART burst mode?
No, it does not. The FBM214B supports universal, common practice, and device-specific commands. However, burst communication mode is not available.

3. What is the maximum cable length to a HART field device?
You can go up to 3030 meters (10,000 feet). This follows the HART FSK physical layer specification HCF_SPEC-54 Rev 8.1.

4. How do I avoid communication crosstalk between channels?
Use the per-channel internal power supplies. If you must use one external supply for multiple channels, install a Cable Balun module. This removes crosstalk.

5. How fast does the FBM214B P0927AH update analog values?
It updates every 100 milliseconds. Additionally, it sends two digital HART messages per second. This balance gives you both speed and rich device data.