YOKOGAWA AAI841-H50 Analog I/O Module

The YOKOGAWA AAI841-H50 is an analog I/O module that provides 8-channel input and 8-channel output for 4-20 mA signals. It supports non-isolated channel configuration and HART digital communication. Furthermore, the module provides configurable 2-wire or 4-wire transmitter connections, allowing each channel to accommodate the selected transmitter wiring arrangement.

Key Features

• 8-channel analog input and 8-channel analog output.
• Supports 4-20 mA input and output signals.
• Non-isolated I/O channel configuration.
• HART digital communication support.
• Per-channel selection of 2-wire or 4-wire transmitter connections using setting pins.
• 10 ms data update period.
• Separate input and output step response times.
• Pressure clamp terminal and KS cable external connections.

Technical Specifications

Analog Signal Processing

The AAI841-H50 handles both analog input and output signals within one module. Its 8 input channels receive 4-20 mA signals from field devices, while the 8 output channels transmit 4-20 mA control signals to external equipment. Therefore, it supports both signal acquisition and control signal transmission through a single module.

Meanwhile, the input and output circuits have different response times and accuracy specifications. The 10 ms data update period defines the data refresh interval, while the 100 ms input response and 40 ms output response describe the respective step response characteristics.

Transmitter Wiring and HART Communication

The module supports both 2-wire and 4-wire transmitter configurations. Maintenance personnel can select the required wiring mode independently for each channel using the setting pins. In addition, the transmitter power supply specification provides the operating voltage conditions for supported 2-wire transmitter connections.

HART communication is available for digital communication alongside the 4-20 mA analog signal. This allows supported HART field devices to exchange digital information through the analog communication loop.

Frequently Asked Questions

Q: How many input and output channels does the AAI841-H50 provide?

A: It provides 8 analog input channels and 8 analog output channels. Both input and output use 4-20 mA signals.

Q: Does the AAI841-H50 support HART communication?

A: Yes. The module supports HART digital communication in addition to its 4-20 mA analog signal processing.

Q: Can the AAI841-H50 connect to both 2-wire and 4-wire transmitters?

A: Yes. It supports both wiring configurations, with the selection made individually for each channel using setting pins.