Honeywell CC-PFB401

Technical Specifications​

Part numbers: 51405044-175, 51405044-176

Protocol: PROFIBUS-DP, IEC 61158 compliant, DP master Class 1

Ports: 2 independent PROFIBUS-DP channels

Baud rate: 9.6 kbps to 12 Mbps auto or manually configured

Node capacity: up to 125 slave nodes per port under protocol rules

Electrical isolation: galvanic isolation between fieldbus ports and control backplane

Backplane power: supplied from Series C chassis; typical dissipation around 6 W in related PROFIBUS configurations

Indicators: LEDs for power, module health, port activity and fault status

Operating temperature: 0°C to 60°C in standard Series C cabinet installations; some carrier and firmware revisions support -20°C to 55°C

Storage temperature: -40°C to 85°C

Dimensions: approximately 267 mm by 178 mm by 51 mm

Weight: approximately 0.45 kg

Compliance: CE, UL, CSA and relevant industrial EMC standards per revision

Functional Features​

Dual-port DP master operation. Cyclic process data exchange and acyclic parameter/read diagnostic exchange. Automatic baud-rate and token management through engineering configuration. Galvanic isolation protects backplane logic from fieldbus transients. Extensive LED diagnostics reduce troubleshooting time.

Application Scenarios​

PROFIBUS remote I/O racks, variable-frequency drives, smart transmitters, motor protection relays, valve manifolds, packaging and discrete machines, legacy TPS/TDC3000 expansion where supported, and multi-vendor DCS fieldbus integration.

Performance Parameters​

Twelve Mbps maximum segment speed provides high-throughput control data. Each port can address a large slave table; actual scan performance depends on baud rate, telegram size, number of slaves and C300 loading.

Material Composition​

Industrial PCB with PROFIBUS transceivers, microprocessor communication fabric, galvanic isolators, metal backplane connector, DB-type or dedicated fieldbus connectors on the IOTA, and molded diagnostic faceplate.

Structural Characteristics​

Series C slot module paired with a PROFIBUS IOTA, such as CC-TFB401 or CC-TFB411 depending on system configuration. Field connector and terminators are located at the IOTA or external bus junction, not on the electronic module alone.

Working Principle​

The module receives controller data from the Series C backplane. The PROFIBUS stack serializes output telegrams, manages token passing and polls slaves on each port. Return telegrams are decoded into controller memory for process variables, status bits and diagnostic events. Galvanic isolation separates field common-mode voltage from the control system.

Installation Requirements​

Mount CC-PFB401 in the assigned Series C slot and connect the PROFIBUS IOTA. Import the correct GSD files into the engineering tool, assign station addresses, set baud rate and segment length according to PROFIBUS distance rules. Install terminating resistors at both physical ends of each 9.6 kbps-to-12 Mbps segment. Bond cable shield to the cabinet ground clamp.

Usage Precautions​

Power down the carrier before module replacement unless hot-swap is expressly enabled. Never operate a segment without proper end termination at 12 Mbps. Keep node count, cable length and repeater rules within PROFIBUS standards. Verify galvanic-isolation grounding before connecting devices from different electrical systems. Check LED fault patterns after each configuration download.