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Yokogawa SED2D-11 Digital Terminal Board

The Yokogawa SED2D-11, also cataloged as the SED2D Digital Terminal Board, operates as a dedicated hardware component for field I/O signal routing and termination within Yokogawa industrial control systems.

Hardware Specifications

Parameter Specification
Model SED2D-11
Brand Yokogawa
Origin Japan
Weight 2.3 kg
Dimensions 482.6 mm (W) x 177 mm (H) x 85 mm (D)
Operating Temp -20 deg C to +60 deg C
Humidity Range 10% to 90% RH (non-condensing)
Channels 4 channels
Signal Types Analog and digital
Current Capacity 5 A per channel
Voltage Tolerance 2000 V AC for 1 minute
Insulation Resistance Min. 100 MΩ at 500 V DC

Channel-to-Channel Isolation and Loop Protocol

The terminal board incorporates internal spacing and isolation barriers to maintain robust signal transmission, rated for a dielectric withstand of 2000 V AC for 1 minute across its 4 operational channels. Providing termination for both analog (including 4-20 mA loop protocols) and digital field signals, the unit limits potential ground loops and electrical interference from field transmitters. Each channel supports a current capacity of up to 5 A, ensuring stable continuity for high-load field devices and maintaining a minimum insulation resistance of 100 MΩ at 500 V DC to protect central processing electronics from field-side voltage transients.

Frequently Asked Questions

Q: What is the maximum current capacity supported by the SED2D-11 terminal board?

A: The board supports a maximum continuous current load of 5 A per individual channel.

Q: Can this terminal board process both analog and digital field signals simultaneously?

A: Yes, the hardware is configured to terminate and route both analog and digital signal types across its 4 available channels.

Q: What is the dielectric withstand rating for the terminal connections?

A: The terminal connections are rated to endure a voltage tolerance of 2000 V AC for up to 1 minute.

Field Installation Guidelines

Mount the terminal board assembly directly into the designated Yokogawa control cabinet, securing the chassis with standard hardware to ensure structural stability across its 482.6 mm width. Route high-current field wiring separately from low-voltage signal cables to mitigate electromagnetic induction. Terminate incoming field signal wires to the designated channel clamps, ensuring all exposed shields are grounded to a single point on the cabinet earth busbar. Verify that any metal conduit entries into the enclosure maintain a minimum engagement of 5 full NPT threads to preserve panel integrity.

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