Product Core Brief

• Model： 1B30023H01
• Brand： Emerson (Former Westinghouse Ovation DCS Series)
• Full Description： ASSY, I/O BUS TERMINATOR – INTERNAL GUIDES
• Series： Ovation Distributed Control System (DCS) I/O rack accessories
• Core Function： Passive termination plug for the end of Ovation IOP (I/O Processor) backplane bus segment. Built-in matched terminating resistors absorb signal reflections, suppress bus ringing, eliminate communication dropouts and intermittent I/O scan faults.
• Product Type： Passive plug-in bus terminator assembly (no power supply required)
• Key Specs： Dedicated 12-pin Ovation I/O backplane interface; factory matched differential termination resistance; rack slot plug-and-play installation
• Note: Original OEM spare; must be installed on the last empty slot of each I/O bus rack segment, otherwise bus communication instability occurs.

Key Technical Specifications

1. Electrical Characteristic
   • Type: Passive resistive termination, no active circuits
   • Matching impedance: Calibrated for Ovation proprietary high-speed I/O backplane differential bus
   • Bus compatibility: All Ovation IOP rack backplanes (standard 2-slot / 8-slot / 16-slot I/O base)
   • Operating bus voltage: 5V DC backplane logic power
   • No additional power consumption, zero heat generation
2. Mechanical & Dimension
   • Overall size: 124 mm × 22 mm × 126 mm
   • Net weight: 0.11 kg
   • Mount: Direct plug into standard Ovation I/O rack module slot, same form factor as I/O card
   • Interface: 12-pin gold-plated backplane edge connector, anti-corrosion industrial grade
3. Environmental Ratings
   • Operating temperature: -20 ℃ ~ +60 ℃
   • Storage temperature: -40 ℃ ~ +85 ℃
   • Humidity: 5%–95% RH non-condensing
   • Vibration resistance: 10g peak 5–500Hz, suitable for turbine & boiler room cabinet installation
   • Protection class: IP20 (cabinet internal use only)
4. Compliance & Origin
   • Certifications: CE, UL, RoHS industrial automation standard
   • Manufacturing origin: Thailand
   • HS code: 8538908180

Product Introduction

The 1B30023H01 is a mandatory accessory for every Ovation IOP I/O rack segment in power plant, petrochemical and metallurgy DCS control systems.Ovation IOP backplane uses high-speed differential serial bus to transmit AI/AO/DI/DO scan data between I/O processor and field modules. Without proper bus termination at the far end of the rack, high-speed signal reflections generate noise spikes, leading to random I/O loss, unreported point faults, communication timeouts between IOP and controller.This terminator plug inserts into the final vacant slot of each independent I/O bus rack, matching the bus characteristic impedance to fully absorb reflected wave signals. As a passive component, it has no failure-prone chips or power circuits, offering ultra-long service life with zero maintenance requirements.Typical application scenarios: Coal-fired power boiler/turbine control racks, combined cycle gas turbine DCS, chemical plant process I/O cabinets, water treatment Ovation control systems.

QA & Testing SOP

1. Incoming InspectionVerify Emerson original serial label; inspect edge connector gold plating for oxidation, plastic housing for cracking, internal resistor assembly for loose solder joints.
2. Bench Bus Signal TestPlug terminator to Ovation standard I/O backplane; use oscilloscope to measure differential bus waveform. Pass standard: No signal overshoot/ringing, reflection amplitude <5% of nominal signal swing.
3. Continuity & Resistance Calibration TestMeasure built-in termination resistor tolerance; reject units out of factory ±1% resistance tolerance window.
4. Mechanical Mating TestRepeated plug/unplug 500 times to confirm connector locking mechanism remains intact, no pin bending.
5. Final PackagingESD anti-static vacuum bag packaging, attached serial number test record label, 24-hour waveform test log enclosed.

Installation Pitfalls & Replacement Guide

Common Critical Mistakes

❗ Missing Terminator = Severe System FaultsIf the last rack slot is left empty without 1B30023H01, bus signal reflection causes intermittent I/O offline, controller scan delay, false alarm trips during unit load fluctuation.❗ Multiple Terminators On One Bus SegmentOnly install one terminator per bus chain. Dual termination creates impedance mismatch, completely paralyzes rack I/O communication.❗ Mix With Non-Ovation Third-Party TerminatorGeneric resistor plugs have unmatched impedance, cannot suppress Ovation high-speed bus noise, will not resolve intermittent communication faults.❗ ESD Damage During HandlingWear grounded anti-static wristband before plugging/unplugging; static discharge may degrade internal precision termination resistors.

4-Step Replacement Guide

1. Pre-operation LockoutCut off IOP rack 24V DC auxiliary power; photograph rack slot layout, confirm which slot is the physical end of the I/O bus segment.
2. RemovalGrasp plastic housing latch, pull the old terminator straight out from backplane slot (no twisting to avoid bending gold pins).
3. InstallationAlign edge connector pins with backplane slot, push the new 1B30023H01 fully into the last vacant slot until the latch clicks locked.
4. Commissioning VerificationRestore rack power; log into Ovation operator station, monitor IOP communication status for 2 continuous hours. Confirm zero I/O scan dropouts and no bus error alarms.

FAQ

Q1: Do every Ovation I/O rack need this terminator?A: Each independent IOP backplane bus chain requires exactly one 1B30023H01 installed at the farthest end slot. Single-slot short bus segments also require termination.

Q2: Does this module need external 24V power supply to work?A: No, it is fully passive, relying only on internal precision resistors, no power draw from backplane.

Q3: Can I use a shorted jumper or separate resistor block instead?A: Not recommended. Discrete external resistors cannot match the differential pair impedance of Ovation proprietary bus, and will not eliminate high-frequency signal reflection.

Q4: What faults indicate missing or failed 1B30023H01?A: Random I/O point offline, periodic IOP communication error logs, analog signal jitter, untriggered digital alarm fluttering during large load transients.

Q5: What warranty applies to original 1B30023H01 spare parts?A: Standard 12-month factory warranty covering internal resistor assembly and connector manufacturing defects; damage from ESD mishandling, forced plug bending, overvoltage surge is excluded.