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EB401-50 Yokogawa ER Bus Interface Module | New & Original Stock

EB401-50 Yokogawa ER Bus Interface Module | New & Original Stock

Configured for high-speed network management in DCS platforms, the Yokogawa EB401-50 (EB401-50 ER Bus Interface Master Module) provides direct physical/electrical execution of ER bus protocol arbitration and node communication.

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Availability: Low stock: 99 left

SKU: EB401-50
Vendor: Yokogawa
Category: ER Bus Interface Module
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Configured for high-speed network management in DCS platforms, the Yokogawa EB401-50 (EB401-50 ER Bus Interface Master Module) provides direct physical/electrical execution of ER bus protocol arbitration and node communication.

Hardware Specifications

Parameter Specification
Model EB401-50
Brand Yokogawa
Origin Japan
Weight 0.3 kg
Dimensions Standard Yokogawa I/O card form factor
Operating Temp Consult system environmental specifications
Power Consumption 0.7 A
Interface IEEE 802.3 10BASE-2 (1 port)
Connector BNC
Data Rate 10 Mbps
Max Segment Length 185 meters (using YCB141 cable)

Network Communication and Protocol Arbitration

The module operates as the primary master device on the ER bus, orchestrating data traffic between local and remote nodes. It utilizes the IEEE 802.3 10BASE-2 physical layer standard to ensure deterministic data exchange at 10 Mbps. By managing the bus arbitration logic, the module maintains strict adherence to the ER bus protocol timing requirements, facilitating coordinated communication across distributed control hardware.

Frequently Asked Questions

Q: Is the 185-meter distance limitation absolute for all cable types?

A: The 185-meter limit is specified for the YCB141 coaxial cable, which matches the characteristic impedance and attenuation requirements of the 10BASE-2 standard. Exceeding this length without a repeater may result in signal degradation and packet collision errors.

Q: Does the module support auto-negotiation for data speeds?

A: No, the EB401-50 is fixed at a 10 Mbps communication speed as dictated by the 10BASE-2 standard and the requirements of the ER bus protocol.

Field Installation Guidelines

  1. Ensure the BNC connector is fully seated and locked to prevent impedance mismatches or signal intermittent contact.
  2. Verify that the 10BASE-2 segment is correctly terminated at both ends with 50 Ohm resistors to prevent signal reflections on the coaxial bus.
  3. Keep the coaxial cable path clear of electromagnetic interference (EMI) sources, such as large motors or variable frequency drives, to maintain data integrity.
  4. Confirm that the module is correctly configured as the bus master within the control system software to avoid bus contention issues.
  5. After physical installation, utilize network diagnostic tools to confirm the link status and ensure that no frame check sequence (FCS) errors are reported at the 10 Mbps data rate.