Emerson VE4003S2B2 DeltaV M-Series Analog Input Termination Block

Configured for analog signal acquisition in DeltaV I/O subsystems, the Emerson VE4003S2B2 (VE4003S2B2 Fused I/O Termination Block) provides direct physical/electrical execution of 4-20 mA HART signal monitoring.

Hardware Specifications

Process Control: 4-20 mA HART Loop Protocol

The VE4003S2B2 block supports the 4-20 mA HART loop protocol, enabling digital communication overlay for transmitter diagnostics and configuration. The module is architected for both 2-wire and 4-wire transmitter configurations, selectable via jumper or terminal wiring. Internal circuitry maintains channel-to-channel isolation, preventing signal interference between individual loops. The block operates within a 12-24 VDC range to provide field loop power, ensuring compliant transmission of both the analog process variable and the frequency-shift keying (FSK) digital HART data to the DeltaV I/O card.

Frequently Asked Questions (FAQ)

Q: Can this termination block be configured for different transmitter wiring types?

A: Yes. The VE4003S2B2 supports both 2-wire and 4-wire transmitter connections. Ensure the field wiring matches the selected input configuration to prevent loop power supply damage or signal clipping.

Q: What is the purpose of the "Key Positions A 1" designation?

A: This is a mechanical keying setting specific to the M-series carrier. It prevents the installation of incorrect I/O card types into this terminal block, ensuring that high-voltage or incompatible signal types are not inadvertently connected to the analog input circuitry.

Field Installation Guidelines

• Mounting: Seat the termination block onto the M-series carrier. Verify that the keying pins are set to position A 1 as required by the I/O card configuration to permit proper latching.

• Wiring: Use shielded twisted pair cables for all analog signal runs. Ground the shield at the cabinet entry point using an approved grounding bar to minimize electromagnetic interference on the 4-20 mA loops.

• Termination: Ensure all terminal screws are tightened to the specified torque. High-resistance connections can introduce voltage drops that affect the accuracy of the 4-20 mA measurement.

• Verification: Check for correct loop voltage (12-24 VDC) at the terminals prior to connecting the field instrument. If HART communication is intermittent, verify that the load resistance on the loop falls within the required specifications for FSK signal transmission.