Description
Note: Many products are not yet listed. Please contact us for more product information. Our supply channels are constantly expanding, and we currently have 20 stable shared supply channels. Please confirm the model, product, price, and all other necessary information with customer service before placing an order. We offer new, refurbished, and used products, and prices are adjusted according to the year of the item you require.
Key Technical Specifications
| Parameter | Value |
|---|---|
| DC Input Range | 18‑32 VDC; dual terminals for redundant source feedingRockwell A… |
| Output Configuration | 4 fully‑isolated intrinsically‑safe channels; 8.5 W per channelRockwell A… |
| Max IS Output Parameters | Uo <9.5 V, Io <1 A; Co 500 nF, Lo 8 μH per channelRockwell A… |
| Enclosure Type | Flame‑proof Ex‑d cast aluminum housing, IP65 rating |
| Cable Glands | Input M20×1.5; Ex‑output M16×1.5 metric entriesRockwell A… |
| Operating Temperature | ‑40 °C to +70 °C (‑40 °F‑158 °F) |
| Hazardous‑Area Ratings | Class I Div1/2, Zone 1/2 Groups IIC, IIB, IIA certifiedRockwell A… |
| Weight | Approx 7.7 kg (17.0 lbs) |
| Status Indication | Per‑channel LED diagnostic lamps |
| Lifecycle Status | Discontinued December 31, 2017, engineering replacement onlyRockwell A… |
Product Introduction
Unlike cabinet‑mounted general‑purpose power supplies, the 1797‑PS2E2 mounts directly inside or at the boundary of classified hazardous zones to feed FLEX Ex remote I/O racksRockwell A…. Every output channel carries full intrinsic‑safety limiting so short‑circuits on field wiring cannot ignite surrounding gas mixtures.
Honestly, many site teams underestimate mechanical gland and enclosure integrity. Damaged threads or improperly torqued cover bolts break the Ex‑d rating entirely, even when internal electronics test perfectly fine. Any swap must include full visual inspection of the cast housing and all cable entry points.
1797-PS2E2
1797-PS2E2
1797-PS2E2
1797-PS2E2
1797-PS2E2
QC, Procurement & Logistics SOP
- Inbound Verification: Cross‑check engraved nameplate catalog number, hardware revision, and certification marks. Inspect cast aluminum enclosure for cracks, dents, or stripped gland threads; record full serial number. Reject units with deformed flame‑joint mating surfaces.
- Live Rig Testing: Apply rated DC input power; confirm each output channel LED behavior. Load each IS channel to verify current‑limiting activation under simulated short‑circuit conditions. Document channel voltage and limiting response for bench‑test records.
- QA & Anti‑Static Packaging: Treat internal circuit assembly as ESD‑sensitive hardware. Protect enclosure flame‑joint surfaces with protective film. Secure heavy cast unit inside shock‑absorbent crate; include printed bench‑test report inside outer packaging.
- Global Logistics & Export Compliance: Apply correct HS code classification to reduce inspection hold‑ups. Crate built for air or sea freight with heavy‑weight and hazardous‑component warning labels. Full export documentation prepared, —though customs clearance in the EU might add 2 days.
Technical Pitfalls & Integration Warnings
- Hardware Revision / Certification Mark Mismatch: A maintenance crew once fitted a surplus unit with worn‑off nameplate markings. Bench power tests passed, but site inspection failed because no valid Ex certification marking could be verified. Never install any unit without legible, intact nameplate hazard ratings.
- DIP‑switch / channel‑load mis‑assignment: Each output channel has strict capacitance‑and‑inductance limits for attached field wiring. One chemical plant overloaded a single channel with excess field cable capacitance; the IS safety margins were breached, and the system threw intermittent, hard‑to‑reproduce channel faults. Calculate cable parameters before assigning field racks to each output port.
- Wiring / gland incompatibility: This unit uses metric‑thread cable glands. Repurposing NPT‑thread adapters without certified Ex‑approved transition fittings destroys enclosure safety approvals. Field technicians have created unapproved mixed‑thread connections, creating explosion‑path risks.
- ESD destruction during internal service: Though housed inside heavy flame‑proof casting, the internal IS‑limiting boards remain static‑sensitive. A technician opening the enclosure without grounding can inflict hidden damage. Unit may show normal idle output, yet fail current‑limit response under real‑world short‑circuit events.
Frequently Asked Questions (FAQ)
Q: What lead times apply sourcing 1797‑PS2E2 for urgent hazardous‑zone outages? A: Bench‑verified surplus stock can ship within 1‑3 working days. Original factory new allocations no longer exist; this part reached end‑of‑production December 2017Rockwell A…. All new‑to‑you hardware comes from surplus stock pools.
Q: What shipping and customs considerations apply sending this heavy Ex‑rated power supply cross‑border? A: Air freight fits emergency outage scenarios; sea freight works best for planned turnarounds. Complete export documentation is supplied. Destination authorities sometimes request review of hazardous‑location certification paperwork, which can extend local clearance timelines.
Q: Can you hot‑swap this power supply while connected live to FLEX Ex field racks? A: Physical hot‑swap of the internal electronics is not permitted under classified‑zone safety rules. You must isolate all field circuits and remove input DC power before opening the flame‑proof enclosure. Live cover removal creates severe explosion‑hazard risk.
Q: Will 1797‑PS2E2 serve as drop‑in replacement for 1797‑PS1E FLEX Ex power supplies? A: Mounting footprint differs, and channel power capacity does not match one‑to‑one. You must re‑evaluate total field‑rack power draw, cable capacitance‑inductance budgets, and gland thread compatibility. Direct bolt‑on swap without review will create unsafe over‑loaded IS channels.
Q: What prerequisites exist for dual‑redundant DC input operation? A: You feed two separate 18‑32 VDC sources to the dual input terminals on this unit. External diodes or OR‑ing modules are still required upstream to prevent reverse‑current cross‑feeding between your two power sources. The supply itself provides no internal source‑OR‑ing logic.
Q: What hidden defects appear on pre‑owned 1797‑PS2E2 units? A: Stripped enclosure cover threads, dented flame‑joint surfaces that break Ex‑d safety, degraded channel current‑limit circuitry, and cracked metric gland ports. Full bench short‑circuit load testing catches most electrical faults, but physical enclosure integrity requires close visual review.
Q: After installing a surplus unit, do the original hazardous‑location certifications remain valid for site use? A: The nameplate markings stay printed on hardware, but end‑user site safety survey bears responsibility for validating enclosure condition, gland selection, and installation workmanship. Surplus hardware does not carry renewed OEM site‑specific hazardous‑location approval.
