PLC Autocontroller · Xiamen
20 years of ABB spare-parts focus · 12-month warranty · Same-day DHL/FedEx/UPS dispatch
ABB RMBA-01 — RS-485 Pulse Distributor
Splits one fibre-optic encoder signal into four differential pulse trains for easy “one-to-many” synchronisation.
① About us – in one line
We have specialised in ABB drive spares for 20 years, stocking R-series interface boards, capacitors and fans in our Xiamen warehouse and offering small-lot spot supply plus technical selection support.
② What RMBA-01 does
Receives PPCS fibre-optic encoder signals (from AMC or AC 800)
Outputs 4 galvanically-isolated RS-485 differential channels (A/B/Z)
Cable length up to 1 200 m, no repeater needed
Auto-baud 9.6 k–12 M, no DIP switches
5 V / 24 V encoder level auto-detect, saving external converters
③ Key data
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Parameter
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Value
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Input
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PPCS fibre (62.5/125 µm)
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Outputs
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4 × RS-485 (A/B/Z)
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Isolation
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500 Vrms channel-to-channel
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Baud rate
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9.6 k–12 M, auto-detect
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Cable length
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≤ 1 200 m (twisted-pair, shielded)
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Supply
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24 VDC ±20 %, 3 W
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Temperature
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–25…+70 °C, IP20
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Marks
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CE, UL, RoHS
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④ Companion interface boards in stock
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Part
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Brief function
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Fits
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Stock
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RMBA-01
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1→4 RS-485 pulse split
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All ACS800/880
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Spot
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RDCO-0C
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3-ch fibre expansion
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ACS800 option slot
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Spot
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RINT-6611
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Gate driver 400 A
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ACS800-04 560 kW
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Spot
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RMIO-01
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8 AI/AO extension
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ACS880 cabinet
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Spot
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NPOW-41
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24 V 5 A supply
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ACS800 common DC
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Spot
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⑤ Typical wiring sketch
Fibre in → RMBA-01 → 4×RJ45 → 4×ACS880 inverters
Z-pulse wired in parallel for sync; A/B differential on shielded twisted-pair; 120 Ω termination built-in, no soldering on site.
⑥ Warranty & logistics
12-month functional warranty – advance replacement
Shipped from Xiamen same day, DHL 3-4 days to EU/US
Commercial invoice & certificate of origin included
Contact May
ab@mooreplc.com | +86-18106909650 (WhatsApp) | WeChat: dcsfc
Send us your encoder type and distance – we’ll calculate termination resistors and cable specs for you.
What happens next?
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Your quote
You’ll get a fully customized quote to fit your unique needs.
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