Field Engineer’s Notes (From the Trenches)
The “Gotcha” is TBSH Base Fuse, Load Voltage Rating & SSR vs Relay Version.
Terminal Base (TBSH) Fuse: Many Ovation DO installations use a user-installed ATC/ATO blade fuse (3A or 5A) on the TBSH base’s +V distribution. If alloutputs on a group or the whole module are dead (Point LEDs respond to forces but load doesn’t energize; or Fuse LED on base lit), check this fuse first. The module itself rarely “blows” — it’s the base feeder fuse that protects the field wiring.
Load Voltage — READ THE LABEL: Some 5X00226G01 sub-revs are 24V DC Only (SSR type); some are 120V AC/DC (relay or SSR). Forcing 120V AC into a 24V DC-only module will destroy it instantly. Verify the white sticker: “Max Load: __V __A” before landing field power.
SSR vs Relay Click: Relay versions make an audible “click” on each state change (helpful for bench testing). SSR versions are silent. If you expect a click and hear silence but the LED lights and the load energizes — that’s normal for SSR. If LED lights, no click, load doesn’tenergize on a relay version → check for welded contacts (load may be stuck ON) or open coil (load won’t come ON — listen for anyfaint click; if none, coil may be open → module bad or voltage not landed at base).
Common (COM) Landing: The TBSH base typically has one or two COM terminals. Land your field 0V (DC) or Neutral (AC) there and tighten to spec (7 lb-in / 0.8 Nm). A loose COM is the #1 cause of “LED ON but load OFF” on a newly commissioned drop — the return path is open.
Real-World Applications
- Balance-of-Plant (BOP) Pump Controls: An Ovation Drop with 5X00226G01 modules drives 120V AC coil seal-in relays for 4160V pump starters (Run/Stop/Auto), plus 24V DC stacklights (Running/Fault/Local Mode) on the same module (if AC/DC rated). The per-point LEDs let the operator see which starter command is active during a manual start attempt.
- Chemical Inj. Skid (24V DC Solenoids): 5X00226G01 (24V DC version) in a NEMA 4X drop near the skid drives sixteen 24V DC solenoid valves (0.3A each). Open Wire / Fuse status reports to the Ovation HMI; during FAT the bench-test click confirmed wiring before live chemical was introduced.
High-Frequency Troubleshooting FAQ
Q: Point LED lights when forced ON, but the field device (solenoid/relay) does NOT energize.
A: Missing Field Power at TBSH Base or Loose COM.
- Check the TBSH Terminal Base: Is the field supply voltage (+24V DC or 120V AC) landed on the +V (Load Supply +) terminal? Is it tight?
- Check the COM (Common / 0V / Neutral) terminal on the TBSH base — is the return landed and tight? Measure voltage across +V and COM— should be the supply voltage. If 0V → supply breaker/fuse issue.
- With the point forced ON, measure voltage across the load(between Output terminal and COM). Should be ≈ supply voltage. If 0V across load but +V-to-COM = good supply → Output terminal or internal contact open (rare; swap module if confirmed). If supply voltage present across load but load doesn’t actuate → load itself is faulty (burned-out coil).
- Check the base ATC fuse (if equipped) — is it blown? (Visual or DMM continuity). Blown fuse → no +V to outputs → LEDs may still light (logic side alive) but no field power.
Q: “Fault” LED Red or Ovation shows “Module Not Responding” / “Drop I/O Fault”.
A: Seating or Base Issue.
- Power down the Drop (or use Ovation hot-swap: note the module’s slot #). Loosen thumb-screws, remove module, inspect gold-edge connector for contamination.
- Ensure the TBSH/TBQC Terminal Base is bolted secure and the Drop Bus ribbon is seated in the base rear.
- Re-insert: press firmly until seated, tighten thumb-screws evenly. Power up / allow Drop to re-scan. “OK” LED should blink init → steady Green.
- If Fault persists → try module in a known-good TBSH base in same drop (swap test). Works = original base bad (Drop Bus interface on base failed). Fails in good base = module defective.
Q: Can I replace a legacy 1C31189G01 with 5X00226G01?
A: Yes, in most Ovation Drop retrofits — verify voltage rating & terminal base compatibility.
- The 1C31189G01 was an older 16-pt DO. The 5X00226G01 is the current-generation form-fit-function replacement for use with TBSH/TBQC bases.
- Confirm: (a) your TBSH base is the correct type (1C31125G02 or later — “G02” suffix bases support both old and new modules), (b) the load voltage/current on the 5X00226G01 label matches your field supply (24V DC or 120V AC/DC as applicable), (c) the Drop Controller firmware is reasonably current (post-2000 Ovation revisions support the new ID — very old pre-Y2K drops may need a CBS update; check with Emerson support if unsure).
- Physical seating: align the module keying with the TBSH base — it will only go in one way.
Please note: The listed price is not the actual final price. It is for reference only and is subject to appropriate negotiation based on current market conditions, quantity, and availability.
如需继续查其他 Ovation Terminal Base (如 1C31125G02 TBSH02)、BIU、Controller(OCI/OCR)、或 GE Fanuc / Foxboro / Honeywell 备件，直接发型号即可。
