YOKOGAWA EA1 SUFF A INPUT MODULE CIRCUIT BOARD CARD

Description:

The Yokogawa EA1 SUFF A is a signal conditioner input module (circuit board card) used in Yokogawa CENTUM XL / micro XL control systems. It is designed to receive and condition input signals from field transmitters typically 4–20 mA current loop signals and convert them into isolated, usable signals for PLC/DCS processing. These cards provide electrical isolation, signal conversion, and in some cases power supply to field devices, helping protect control systems from noise and ground loops. 

Applications:

The Yokogawa EA1 SUFF A module is used in distributed control systems (DCS), PLC panels, and process automation environments. It is commonly installed in signal conditioner nests interfacing with transmitters such as pressure, flow, temperature, and level sensors in industries like oil & gas, manufacturing, and utilities.

Technical Specifications:

• Manufacturer: Yokogawa
• Model / Part Number: EA1 SUFF A (EA1*A series)
• Product Type: Input Signal Conditioner Module / Circuit Board
• Signal Type: 2-wire transmitter input (4–20 mA typical)
• Function: Signal conditioning, isolation, and conversion
• Input Resistance: ~250 Ω (typical)
• Mounting: Plug-in card for signal conditioner nest
• System Compatibility: Yokogawa CENTUM XL / micro XL systems
• Power: Supplied via system backplane / nest

Common Replacements:

• Yokogawa EA1*A variants (different suffix/configs)
• Yokogawa EA / EC / EP signal conditioner cards
• DIN-rail signal isolators (application dependent)