YOKOGAWA EC402-50

YOKOGAWA EC402-50

1. Product Overview of YOKOGAWA EC402-50

The YOKOGAWA EC402-50 is a factory-original two-port ESB bus coupler module within the full EC402 series lineup, including EC402-00 basic variant and EC402-E0 explosion-proof module. Developed exclusively for Yokogawa CENTUM VP distributed control systems, this communication card acts as the core bridge between Field Control Units (FCUs) and remote N-IO/FIO node units. Unlike general communication adapters, YOKOGAWA EC402-50 delivers stable 128 Mbps high-speed data transmission for analog/digital I/O signals, supporting dual redundant bus deployment to eliminate single-point communication failure risks. It fits standard dedicated slots of AFV30D, AFV40S, A2FV50D FCU racks without mechanical modification, widely stocked as critical replacement spare parts for refineries, thermal power stations and metallurgical control cabinets.

2. EC402-50 Complete Model Code Breakdown

EC402: Base series identifier, represents ESB bus master coupler module for CENTUM VP N-IO system

First suffix digit “5”: Hardware classification code, standard industrial general-purpose version without hazardous area explosion-proof certification

Second digit “0”: Basic hardware configuration, standard PCB circuit without extra signal isolation circuits; suffix “1” carries reinforced anti-interference components for high EMI workshop environments

3. Full Technical Parameters of YOKOGAWA EC402-50

Standard Model: YOKOGAWA EC402-50, compatible sibling models EC402-00, EC402-E0

Communication Interface: Dual ESB bus ports (upper & lower channel independent transmission)

Nominal Transmission Speed: 128 Mbps dedicated for DCS I/O data packet transfer

Max Connectable Nodes: Upper port supports up to 9 node units; lower port supports up to 9 node units, total max 13 nodes per module

Single Channel Transmission Distance: Upper side max 10 m, lower side max 10 m, total span limit 20 m

Power Input Spec: 24 V DC rack bus power supply, rated operating current 0.5 A, power consumption approx 4 W

Physical Dimensions: 32.8 mm (W) × 129.5 mm (H) × 130 mm (D), single unit weight 0.24 kg

Installation Standard: FCU rack slot mounting, DIN rail auxiliary fixing support

LED Status Indicators: RDY (module self-test normal), RCV (bus signal receiving), SND (bus signal sending)

Environmental Tolerance: Operating temperature -20°C ~ +60°C; storage temperature -40°C ~ +85°C; humidity 5%–95% RH non-condensing

Mechanical Resistance: Vibration resistance 5–150 Hz, 0.075 mm amplitude; shock resistance 150 m/s² for 6 ms pulse

Cabinet Protection Rating: IP20 for internal rack deployment

Electromagnetic Performance: EMC Class B compliant, resizes interference from on-site inverters and large motors

Reliability Index: Calculated MTBF 120,000 hours under 25°C ambient temperature

Compliance Certifications: CE, RoHS, IEC 61131 industrial control standard certified

Redundancy Setup Rule: Two EC402-50 modules installed in slot 7 & slot 8 of FCU to build fully redundant ESB bus system

4. Unique Core Advantages of YOKOGAWA EC402-50

First, the independent dual-channel ESB port design of YOKOGAWA EC402-50 separates upstream FCU and downstream node data flow, avoiding cross-channel data congestion that causes I/O signal delay. Second, unified rack slot interface enables direct plug-and-play replacement for aging EC402-00 modules during cabinet maintenance, no program modification required. Third, high-speed 128 Mbps bandwidth supports large-scale I/O expansion with up to hundreds of analog/digital channels without data loss. Fourth, dual redundant parallel configuration guarantees seamless bus switching when one EC402-50 module fails, preventing full DCS rack communication outage. Every YOKOGAWA EC402-50 undergoes 72-hour continuous bus aging testing and signal stability inspection before factory packaging.

5. Industrial Application & Global Supply Support

YOKOGAWA EC402-50 serves all industrial facilities equipped with Yokogawa CENTUM VP DCS systems, covering crude oil refineries, natural gas processing plants, municipal wastewater automation and coal-fired power control rooms. System integrators, factory electrical maintenance teams and DCS spare parts distributors regularly stock EC402-50 as emergency communication replacement modules. All supplied YOKOGAWA EC402-50 units are brand-new original with intact anti-static Yokogawa carton packaging, covered under a 12-month manufacturer warranty. We offer worldwide bulk door-to-door shipping for automation wholesale buyers and one-stop matching supply for full EC402 series bus coupler modules.