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Honeywell 8C-TAOXB1 Analog Output Redundant IOTA

Configured for redundant analog signal termination in Honeywell Experion PKS Series 8 I/O systems, the Honeywell 8C-TAOXB1 (51454439 Analog Output Redundant IOTA) provides direct physical and electrical connection between field devices and Series 8 analog output modules.

Hardware Specifications

Parameter	Specification
Model	8C-TAOXB1 / 51454439 / 51307137-175
Brand	Honeywell
Origin	USA
Product Type	Analog Output Redundant IOTA
System Compatibility	Honeywell Experion PKS / C300 / Series 8 I/O
Function	Analog output field wiring termination and redundant signal interface
Channel Count	16 channels
Signal Type	4-20 mA current output
Communication Support	HART communication compatible
Redundancy Configuration	Dual redundant Analog Output module connection
Conformal Coating	G3 conformal coating
Power Supply	24 VDC nominal, 22-28 VDC range
Resolution	16-bit DAC
Accuracy	±0.05% FS linearity; ±0.2% calibrated accuracy at 25 deg C
Load Resistance	50 ohm to 800 ohm
Operating Temp	-40 deg C to +70 deg C
Relative Humidity	5% to 95% RH non-condensing
Isolation	2.5 kVrms system-to-field galvanic isolation
Dimensions	12-inch IOTA assembly
Power Consumption	Not specified

4-20 mA HART Loop and Channel Isolation Characteristics

The 8C-TAOXB1 provides a termination interface for Honeywell Series 8 Analog Output modules with 4-20 mA HART field signal capability. Therefore, each channel supports analog current transmission for valve positioners, actuators, and process indicators.

The assembly implements galvanic isolation between system-side circuits and field wiring. In addition, the redundant I/O structure maintains signal availability when paired output modules perform transfer operations.

The G3 conformal coating protects electronic surfaces against moisture, dust, and corrosive contaminants. Furthermore, the termination assembly supports open-wire detection and channel-level diagnostic reporting through the Experion PKS control environment.

Frequently Asked Questions

Q: Does the 8C-TAOXB1 support redundant Analog Output module operation?
A: Yes. The assembly supports dual redundant Analog Output module configurations and provides field signal termination for redundant Series 8 I/O architectures.

Q: What field signal type does the 8C-TAOXB1 handle?
A: The unit handles 4-20 mA analog output signals and supports HART communication for compatible field devices.

Q: Can the 8C-TAOXB1 be removed during system operation?
A: The assembly is designed for hot-swap compatible Series 8 I/O configurations; however, maintenance procedures must follow the applicable Honeywell system installation requirements.

Field Installation Guidelines

• Install the 8C-TAOXB1 within the specified Honeywell Series 8 I/O mounting structure and verify mechanical alignment before connection.
• Use shielded field cables for analog signal wiring and connect cable shields according to the plant grounding standard.
• Separate analog signal wiring from high-voltage power cables to reduce electromagnetic interference.
• Verify 4-20 mA loop polarity before energizing the field circuit.
• Confirm redundant module assignments and termination wiring before system commissioning.
• Inspect terminal connections for proper mechanical tightness and verify that field wiring insulation remains undamaged.
• Confirm environmental conditions remain within the specified operating temperature and humidity limits.

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