Description

Yokogawa YNT511D-P42/KT Optical Bus Repeater Rack

The Yokogawa YNT511D-P42/KT, also cataloged as the YNT511D Optical Bus Repeater Rack, operates as a dedicated hardware component for optical network extension within CENTUM VP and CENTUM CS / CS 3000 systems. It provides direct physical signal transmission and isolation for distributed controllers and remote I/O modules over fiber optic networks.

Hardware Specifications

Parameter	Specification
Manufacturer	Yokogawa Electric Corporation
Model Number	YNT511D-P42/KT
Product Type	Optical Bus Repeater Rack (without Cards)
Compatible Systems	CENTUM VP, CENTUM CS 3000, CENTUM CS
Network Protocols	V net, S3 Bus, RIO
Max Communication Range	Up to 4 km (fiber optic)
Number of Module Slots	13 slots (Optical ESB Bus Repeater Modules)
Input Power Supply	24 VDC / 220–240 VAC (configurable)
Current Consumption	Max 60 mA (base frame)
Isolation Voltage	1 kV DC
Form Factor	19-inch rack mount
Dimensions (W x H x D)	19.0" x 7.0" x 12.0" (48.3 cm x 17.8 cm x 30.5 cm)
Weight	8.0 lbs (3.6 kg)
Operating Temperature	-10 degC to +55 degC
Storage Temperature	-20 degC to +70 degC
Country of Origin	Japan / Singapore

Process Control Network Isolation

The YNT511D-P42/KT provides channel-to-channel isolation for each installed optical module. This prevents cross-talk and minimizes noise propagation along multi-module fiber links. The chassis uses optical isolation to eliminate ground loop effects and supports cold junction compensation for precise signal fidelity in extended distances. Module-to-chassis electrical isolation is rated at 1 kV DC, ensuring stable operation under industrial EMI/RFI exposure.

Frequently Asked Questions

Q: Does the rack support hot-swappable optical modules?
A: No. Optical ESB Bus Repeater modules must be powered down before insertion or removal to maintain signal integrity.

Q: What is the maximum current load when fully populated?
A: Base frame consumption is 60 mA; each optical module adds additional load as specified in its datasheet.

Q: Can the chassis be grounded via DIN-rail installation?
A: Yes. Proper chassis grounding to plant earth is required to maintain isolation performance and reduce EMI susceptibility.

Field Installation Guidelines

1. Mount the chassis in a standard 19-inch rack using appropriate screws and rack-mount brackets.
2. Connect input power according to the installed power supply specification (24 VDC or 220–240 VAC).
3. Route fiber optic cables avoiding sharp bends (<30 mm radius) and high electromagnetic interference zones.
4. Ensure chassis is properly grounded to prevent signal degradation.
5. Insert optical modules only after verifying power is disconnected.
6. Maintain at least 50 mm clearance around the chassis for ventilation.

Specifications

• Brand: Yokogawa

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems