Product Core Brief

• Model： 1B30023H02
• Brand： Emerson (Former Westinghouse Ovation DCS Platform)
• Full Alias： TERM-R / Right-Side I/O Bus Terminator
• Series： Ovation IOP I/O Rack Bus Termination Accessory
• Core Function： Passive matched differential terminator for the RIGHT end of Ovation IOP backplane bus segment. Built-in precision resistors absorb high-speed signal reflection, suppress bus ringing, eliminate intermittent I/O offline, scan timeout and analog signal jitter.
• Product Type： Passive plug-in bus terminator assembly (no power supply, no LED indicators)
• Key Differentiation vs 1B30023H01：
  • 1B30023H01 = TERM-L Left-side terminator
  • 1B30023H02 = TERM-R Right-side terminatorTwo parts have different internal pin routing; cannot cross-use arbitrarily per rack backplane layout
• Note: Original OEM spare; each independent I/O bus chain requires one terminator matching the physical far end (left/right) of the rack backplane.

 

Key Technical Specifications

Electrical Performance

1. Type: Fully passive resistive differential termination, no active chips, zero heat generation
2. Impedance: Factory calibrated to match Ovation proprietary high-speed I/O backplane differential bus
3. Bus compatibility: All standard Ovation IOP 8-slot /16-slot I/O base racks
4. Logic bus voltage: 5V DC backplane logic rail, negligible power draw
5. No diagnostic LEDs, pure termination function only

Mechanical & Dimension

• Overall size: 122 mm × 21 mm × 124 mm
• Net weight: ~0.10 kg
• Mount: Direct plug into standard Ovation I/O card slot, identical form factor as I/O module
• Interface: 12-pin gold-plated anti-corrosion edge connector, dedicated right-side pin assignment
• Lock latch: Integrated plastic snap lock for vibration resistance in boiler/turbine cabinets

Environmental Ratings

• Operating temperature: -20 ℃ ~ +55 ℃
• Storage temperature: -40 ℃ ~ +85 ℃
• Humidity: 5%–95% RH non-condensing
• Vibration withstand: 10g peak 5–500Hz, power plant cabinet compliant
• Protection class: IP20, cabinet internal installation only

Compliance

Certifications: CE, UL, RoHS industrial automation standard; manufactured in USA

 

Product Introduction

The 1B30023H02 (TERM-R) is a mandatory matching accessory for Ovation DCS I/O racks used in thermal power, combined cycle gas turbine, petrochemical and water treatment control systems.Ovation IOP backplane transmits high-speed differential scan data between I/O processor and field AI/AO/DI/DO cards. Without proper end termination at the rightmost rack slot, signal reflection creates noise spikes that cause random I/O point dropouts, unreported analog drift, and controller communication error logs during unit load transients.This right-side dedicated terminator is engineered with unique pin mapping matching the backplane’s right bus terminal layout; generic resistors or left-side 1B30023H01 cannot fully suppress signal distortion if installed on the rack’s far right slot. As a passive component, it requires zero routine maintenance and has an ultra-long service life with no failure-prone electronic parts.

 

QA & Testing SOP

1. Incoming InspectionVerify Emerson original serial anti-counterfeit label; inspect gold edge connector for oxidation, plastic housing crack, internal resistor solder joints for looseness.
2. Bench Bus Waveform TestPlug module to Ovation standard I/O backplane; oscilloscope differential waveform test, pass standard: signal overshoot & reflection amplitude <5% nominal swing.
3. Resistance Calibration TestMeasure built-in termination resistor tolerance, reject units exceeding factory ±1% tolerance range.
4. Mechanical Durability Test500 repeated plug/unplug cycles to confirm latch and pins remain intact without bending.
5. Final PackagingESD anti-static vacuum bag sealed, attached serial number test report with 24-hour continuous bus stability log.

 

Installation Pitfalls & Replacement Guide

Critical Installation Mistakes to Avoid

❗ Mix TERM-L / TERM-R Terminator Mismatch1B30023H01 (Left) and 1B30023H02 (Right) have different internal wiring. Installing left terminator on rack right end will not eliminate reflection fully, leading to intermittent bus faults.❗ Dual Terminators On One Bus SegmentOnly install one terminator per independent I/O bus chain. Two terminators create severe impedance mismatch and fully paralyze rack I/O communication.❗ Omit Terminator At Far Right SlotEmpty rightmost slot without 1B30023H02 will generate frequent IOP timeout alarms, analog signal fluctuation, and false digital alarm fluttering.❗ ESD Damage RiskMust wear grounded anti-static wristband before plugging/unplugging; static discharge degrades internal precision resistors and gold connector pins.❗ Hot Swap ProhibitedDo not insert/remove module with rack 24V DC power energized; backplane live plugging damages backplane bus transceivers.

4-Step Replacement Guide

1. Pre-operation LockoutCut off IOP rack 24V DC auxiliary power; photograph full rack slot layout to confirm the physical rightmost vacant bus slot.
2. RemovalPinch the plastic side latch, pull old terminator straight out horizontally (no twisting to prevent gold pin bending).
3. InstallationAlign 12-pin edge connector with the right-end slot backplane, push fully until latch clicks locked into position.
4. Commission VerificationRestore rack power; log into Ovation operator station to monitor IOP communication status for 2 continuous hours. Confirm zero bus error logs and stable analog/digital point readings.

 

FAQ

Q1: What is the difference between 1B30023H01 and 1B30023H02?A: 1B30023H01 = TERM-L Left-side terminator for rack far-left bus end; 1B30023H02 = TERM-R Right-side terminator for rack far-right bus end. Internal pin routing differs, must match rack bus physical end position.

Q2: Does this module need external power supply to work?A: No, fully passive resistive design, draws no auxiliary power from the rack backplane.

Q3: Can I use discrete external resistors to replace this OEM terminator?A: Not recommended. Discrete resistors cannot match Ovation differential bus paired impedance, and cannot eliminate high-frequency signal reflection completely.

Q4: What system faults indicate missing or damaged 1B30023H02?A: Random I/O point offline, periodic IOP communication error logs, analog value jitter, intermittent digital point flickering during boiler/turbine load changes.

Q5: What warranty applies to original 1B30023H02 spare parts?A: Standard 12-month factory warranty covering internal resistor assembly and connector manufacturing defects; damage from ESD mishandling, forced plug bending, live hot swap is excluded.