Yokogawa AAI835-S00/K4A00 Analog I/O Module

The AAI835-S00/K4A00 is a Yokogawa analog I/O module with four isolated current input channels and four isolated current output channels. It handles 4-20 mA signals for analog signal acquisition and output control. The -S00 configuration specifies the standard type without explosion protection, while the /K4A00 option provides a KS Cable Interface Adapter (ATK4A-00).

Technical Specifications

Analog Input and Output Functions

The AAI835 combines four current input channels and four current output channels in one module. The input channels receive 4-20 mA signals from field instruments, while the output channels transmit corresponding current signals to external control equipment.

Furthermore, the isolated channel configuration provides electrical separation between the signal channels and the system. The input accuracy of +/-16 uA and output accuracy of +/-48 uA define the specified current measurement and output accuracy.

Output Load and Electrical Conditions

The output channels support a load resistance of 0 to 750 ohm. Therefore, the connected field device and wiring resistance should remain within this specified load range.

The module also specifies a maximum input current of 25 mA. Meanwhile, its insulation withstands 500 VAC for one minute between the input/output circuits and the system, as well as between individual I/O channels.

Model Configuration and Ordering Information

The ordering code AAI835-S00/K4A00 identifies the following configuration:

• AAI835: Four-channel analog input and four-channel analog output module.
• -S: Standard type without HART digital communication.
• 0: Basic type without explosion protection.
• /K4A00: KS Cable Interface Adapter, model ATK4A-00.

In addition, the AAI835 product family provides other configuration options, including HART communication, explosion protection and different terminal block arrangements. These options have separate ordering codes and should not be assumed to apply to this model.

Frequently Asked Questions

Q: How many input and output channels does the AAI835-S00/K4A00 provide?

A: It provides four isolated 4-20 mA input channels and four isolated 4-20 mA output channels.

Q: Does the AAI835-S00/K4A00 support HART communication?

A: No. The -S suffix identifies the standard type. The HART communication version uses the -H suffix.

Q: What is included in the /K4A00 configuration?

A: The /K4A00 option specifies the KS Cable Interface Adapter, model ATK4A-00. This option distinguishes the module's connection configuration from versions supplied with other interface or terminal block options.