① Address triple consistency
Module DIP, RCU programming table, and integrator upper mapping must match revision; address changes need change order and full-room retest.
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RS485 bus guestroom control
RS485 guestroom control — per-room address maps, modules and glass touch panels on one bus for chain standard stores.
- 9600 Default baud bps
19200 / 38400 negotiable - 01–0F Single-room address range
main gateway at 01 - 4-wire A/B/GND/shield
star or daisy from LV box - Open Modbus RTU / proprietary
register map with BOM
* Address and baud are engineering examples; contract should attach 《Single-room RS485 address allocation table》 revision; no on-site address changes.
Bus address allocation table
Core tender and acceptance attachment — PurePoint Smart chain standard room and suite templates; integrator upper system, RCU programming, and module DIP mustmatch in three places. Highlighted rows: master gateway and card power node.
| Device | RS485 address | Baud rate | Notes |
|---|---|---|---|
| RCU master gateway | 01 | 9600 | Single-room unique host; optional TCP gateway between floors |
| Card power module | 02 | 9600 | Includes door DI; relay output to mains box |
| Entry four-key scene panel | 03 | 9600 | Triple panel: corridor / DND-MUR / master off |
| Left bedside scene panel | 04 | 9600 | Bright / sleep / read / curtain |
| Right bedside scene panel | 05 | 9600 | Mirror left; matching silk |
| 8-circuit relay module | 06 | 9600 | R1–R8: main, downlight, bath, minibar, outlets, etc. |
| 2-circuit dimmer module | 07 | 9600 | D1–D2: bedside read, mood strip |
| FCU HVAC module | 08 | 9600 | Two-pipe FCU; Welcome/vacant from RCU |
| curtain module | 09 | 9600 | Sheer + blackout; motor 220V via relay |
| Thermostat display | 0A | 9600 | Read room/setpoint only; valve control on 08 |
| Device | RS485 address | Baud rate | Notes |
|---|---|---|---|
| RCU master gateway · living room | 01 | 9600 | Suite master; connecting rooms may use 01 / 11 dual masters |
| Card power · entry | 02 | 9600 | Whole-suite card power main logic |
| Living room scene panel | 03 | 9600 | Receive / cinema / all-off |
| Master bedroom scene panel | 04 | 9600 | Sleep / night / curtain |
| Second bed / study panel | 05 | 9600 | Adjust per actual zones |
| 12-circuit relay module | 06 | 9600 | Living + dining + corridor circuits |
| 8-circuit relay · bedroom zone | 07 | 9600 | Master / second bed / bath lights |
| 4-circuit dimmer module | 08 | 9600 | Strip, wall wash, mood zones |
| FCU module ×2 | 09 / 0A | 9600 | Living / bedroom independent FCU |
| Curtain module ×2 | 0B / 0C | 9600 | Living large window + bedroom |
| Sub gateway (optional) | 11 | 9600 | Bedroom remote device daisy hub |
Engineering essentials · Four implementation rules
RS485 rework often from address conflicts and unset topology — points below go in construction brief and acceptance list.
② Control chain length
Recommend ≤15 devices per chain; long links need repeaters or sub-gateways; 120Ω termination per manual.
③ Mains/LV separation
RS485 parallel to 220V ≥30 cm; shield single-end ground; avoid VFD elevator and UPS raceways.
④ Fault segment isolation
Single module fault must not lock whole floor — per-room address segments, floor gateways isolate; spares bound to address table.
Four deployment route comparison
RS485 balanceschain replication and open protocol— compared to luxury wired and wireless retrofit below.
| Comparison | Wireless RCU | Central wired | RS485 bus | Modular chassis |
|---|---|---|---|---|
| Use case | Existing retrofit · B&B | Luxury new build | Chain standard store | Suite · multi-circuit |
| Protocol openness | ★★★☆☆ | ★★★☆☆ | ★★★★★ | ★★★★☆ |
| Install flexibility | ★★★★★ | ★★☆☆☆ | ★★★☆☆ | ★★★☆☆ |
| Stability | ★★★☆☆ | ★★★★★ | ★★★★☆ | ★★★★★ |
| Batch replication | ★★★☆☆ | ★★★★☆ | ★★★★★ | ★★★★☆ |
| Acceptance focus | Pairing · battery · signal | Terminals · circuit table | Address table · baud · topology | Slot table · circuit mapping |
Guestroom control technology · Four deployment routes
Column A four pages — current RS485 bus route; other routes on respective tech pages.
