TK-HAIO81 Honeywell HART Analog Output Module

The Honeywell TK-HAIO81 is an 8-channel high-precision analog output module engineered for process control and industrial automation applications. Complying with HART Protocol Revision 5.7, it delivers analog current signals to field actuators and control valves while enabling online instrument diagnostics and remote parameter configuration.

Output Performance and Response Speed

The module features eight analog output channels operating across a 0 to 21 mA signal range with a 15-bit resolution (656 nA/bit). It executes a full 0-100% scan across all channels in 10 ms. Output step response settling time to 95% of final value is less than 23 ms without HART communication active and less than 35 ms with HART enabled, while voltage output settling achieves 95% in less than 8.5 ms.

Signal Stability and Field Protection

Integrated short-circuit protection prevents hardware damage caused by field wiring faults or loop short circuits. Thermal stability across its operating temperature range (-20 deg C to +70 deg C) is characterized by offset drift ratings of 50 uV/deg C for voltage and 200 nA/deg C for current, alongside gain drift ratings of 20 ppm/deg C for voltage and 30 ppm/deg C for current. High RFI immunity caps signal error below 2.0% of range at 10 V/m across 27 to 1000 MHz.

Frequently Asked Questions

Q: Does the TK-HAIO81 module support HART field instrument communications?

A: Yes, it complies with HART Protocol Revision 5.7 for digital instrument diagnostics and signal pass-through across all 8 channels.

Q: How does HART communication affect the current output response time?

A: Current output settling time to 95% of final value is less than 23 ms without HART, and increases to less than 35 ms when HART communication is active.

Q: What short-circuit protections are built into the TK-HAIO81?

A: The module includes onboard short-circuit protection to prevent hardware damage from improper field loop wiring or device short circuits.