Bently Nevada 136294-01 3500/62 I/O Daughter Card

Manufacturer Background: Bently Nevada (Baker Hughes GE) dedicated signal input I/O sub-board matching 3500/62 process variable monitor main module; isolated 4–20mA analog signal acquisition board with external terminal base, used for pressure, flow, liquid level process signal collection of turbines, compressors and industrial units, intrinsic safety isolation design, compliant with API 670, CE, UL industrial standards.

Part Number Breakdown: 136294-01 - 136294 = Base serial number for isolated 4–20mA external terminal I/O daughter boards of 3500/62 - -01 = Revision 1 standard version, external screw terminal type, full galvanic isolation for each channel - Contrast models: 136491-01 (internal terminal non-isolated 4–20mA), 137110-01 (intrinsically safe barrier internal terminal I/O)

Product Type: Hot-swappable rear pluggable I/O sub-board for 3500/62 main monitor; 6-channel independent isolated 4–20mA analog input, external terminal wiring mode, collects standard industrial transmitter process signals, sends conditioned signals to 3500/62 main CPU for alarm judgment and rack data upload.

Matching System Components: 3500/62 process variable monitor main control board; 3500 series 4/8/14-slot 24VDC rack chassis; 4–20mA pressure/flow/level transmitters; 3500 rack configuration software, DCS analog input modules, paperless recorders.

Core Hardware Overview: 1. Channel Resource: 6 independent 4–20mA analog input channels, each channel equipped with separate galvanic isolation circuit, no cross-talk between channels. 2. Wiring Mode: External rear screw terminal block, field transmitter cables connect to rear terminal base, easy on-site wiring and maintenance without disassembling main module. 3. Isolation Performance: Each channel 2kV isolation between field signal and internal monitor logic circuit, eliminate ground loop interference in multi-point distributed measurement systems. 4. Signal Adaptation: Standard 4–20mA two-wire/three-wire industrial transmitter signal input, internal built-in loop power supply for passive transmitters. 5. Mechanical Spec: Compact rear daughter board size 112mm × 40mm × 15mm, net weight ~0.22kg, metal shielding anti-EMI housing, plug into dedicated rear expansion slot of 3500/62 main module, no extra rack slot occupation. 6. Environmental Ratings: Operating temperature -30℃ ~ +65℃ inside cabinet; storage -40℃ ~ +85℃; relative humidity 5%–95% non-condensing; IEC 60068 vibration & shock certified for power plant and petrochemical substations. 7. Power Consumption: Powered by internal backplane bus of 3500/62 main module, additional power consumption ≤1.1W, no independent external DC power required. 8. Interchangeability: Exclusive matching with 3500/62 process variable monitor main module, cannot be used with 3500/60 / 3500/61 temperature monitor series.

1. Product Overview

136294-01 is the external terminal isolated 4–20mA I/O daughter sub-board for Bently Nevada 3500/62 process variable monitor, responsible for collecting standard industrial process analog signals such as pressure, flow and liquid level. Adopts full independent channel isolation design, each 4–20mA loop completely isolated, effectively avoid signal distortion and measurement drift caused by ground potential difference in large factory multi-transmitter systems. External rear screw terminal wiring structure facilitates field wiring, fault inspection and replacement without dismounting the whole 3500/62 main module. Built-in loop power supply supports passive two-wire transmitters widely used in petrochemical and power industries. After signal conditioning, the 3500/62 main board calculates real-time process values and executes configurable Alert/Danger two-stage alarm logic, uploads static process data and alarm events to System 1 diagnostic workstation via rack backplane bus. Hot-swappable rear plug-in design allows replacement without powering off the main monitor, process monitoring logic will not be interrupted during maintenance. Widely used in turbine, compressor unit auxiliary parameter monitoring cabinets requiring multi-channel isolated 4–20mA signal acquisition.

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