Emerson VE4012S2B1 KJ3102X1-BA1 DeltaV Analog Output Modules
Manufacturer: Emerson
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Part Number: VE4012S2B1 KJ3102X1-BA1
Condition：New with Original Package
Product Type: Analog Output Modules
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Emerson VE4012S2B1 DeltaV Analog Output Module
The Emerson VE4012S2B1, also cataloged as the KJ3102X1-BA1 Analog Output Module, operates as a dedicated hardware component for converting digital control signals into 4-20 mA current loops within DeltaV DCS networks. The module provides 16-bit digital-to-analog conversion across 8 galvanically isolated channels to drive final control elements, positioners, and active actuators. Integrated HART pass-through circuitry enables bidirectional field-device parameterization without disturbing primary loop control variables.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | VE4012S2B1 (KJ3102X1-BA1) |
| Brand | Emerson |
| Origin | USA |
| Weight | 0.25 kg |
| Dimensions | 51 x 102 x 102 mm |
| Operating Temp | -40 to +70 deg C |
| Power Consumption | LocalBus: 12 VDC at 150 mA; Bussed Field Power: 12 VDC at 300 mA; Field Circuit: 24 VDC at 32 mA |
| Signal Range | 4-20 mA output |
| Output Channels | 8 isolated channels |
| Resolution | 16-bit D/A conversion |
| Protocol Support | HART pass-through (point-to-point) |
| Relative Humidity | 5% to 95%, non-condensing |
| Environmental Rating | ISA-S71.04 Class G3 harsh environments |
| Vibration Resistance | 1 mm peak-to-peak (2-13.2 Hz), 0.7 g (13.2-150 Hz) |
| Shock Resistance | 10 g half-sine wave for 11 ms |
| Enclosure Protection | IP20 |
| Certifications | CE, UL, ATEX, IECEx (Zone 2 / Class I Div. 2) |
4-20 mA HART Loop Protocol and Channel Isolation
The hardware architecture incorporates dedicated channel-to-channel galvanic isolation to prevent ground potential differences from causing signal crosstalk or offset errors across connected current loops. Each output stage features continuous loop compliance voltage monitoring to maintain 4-20 mA signal precision under varying field load impedances. For digital instrumentation maintenance, the module supports point-to-point HART pass-through communication, superimposing high-frequency digital frequency-shift keying (FSK) signals onto the analog current loop. This path permits direct controller-level asset management software interaction with smart valve positioners without requiring external multiplexers or interrupting real-time analog process updates.
Frequently Asked Questions
Q: How does the module handle power distribution between field devices and the backplane?
A: The module draws 12 VDC at 150 mA from the LocalBus for internal logic operation, while field output loops utilize 12 VDC at 300 mA from the bussed field power rail combined with 24 VDC at 32 mA per field circuit.
Q: What structural measures prevent electrical interference across adjacent output channels?
A: Every channel features individual galvanic isolation, decoupling electrical grounds between separate control loops to eliminate ground loop currents and common-mode noise propagation.
Q: Does the module support multi-drop HART configurations?
A: No, HART pass-through functionality on this module operates strictly in point-to-point mode for single-device diagnostics and parameterization per channel.
Field Installation Guidelines
Mount the module directly onto standard DeltaV I/O carrier slots until the retaining mechanisms lock into position. Ensure that all backplane power supply connections are powered down before inserting or removing modules to prevent bus interface voltage spikes.
Route field wiring through dedicated cable channels, separating 4-20 mA analog output conductors from high-voltage AC lines and switched inductive loads. Use twisted-pair shielded cables for all analog current loops. Terminate shield drain wires at the ground bar within the field junction box or system cabinet using low-impedance ground clamps. Maintain solid grounding to uphold ISA-S71.04 Class G3 environmental protection standards and suppress electromagnetic noise coupling into HART communication signals.