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Werma 640 Beacon
The Werma 640 Beacon is a KombiSIGN 71 USB five-tier signal tower, Werma part 640.840.00. Revolution drives it over USB from the host so a schedule’s state is visible from across the room, not only on a screen.
At a glance
Section titled “At a glance”| Type | KombiSIGN 71 5-tier signal tower (640.840.00) |
| Tiers | 5 |
| Revolution control | Schedule state is mapped to a tier; the driver sets the tower to match |
| Configuration | COM port, plus which tier means running, paused and error |
About the KombiSIGN 71 terminal element
Section titled “About the KombiSIGN 71 terminal element”The 640 is built on Werma’s KombiSIGN 71 modular tower system. Werma’s technical datasheet for a KombiSIGN 71 tower (part 649.240.02, a three-tier green/yellow/red unit) states the following series characteristics:
| Diameter | 70 mm |
| Protection category | IP65 |
| Light source | LED |
| Working temperature | −20 °C to +50 °C |
Those figures are quoted from the datasheet for that specific part, not the USB terminal element Revolution drives. The electrical ratings of the USB terminal element (640.840.00) are not reproduced here — Werma does not publish them on the pages above, and a signal tower’s supply voltage is not something to guess at. Confirm them against the leaflet supplied with your unit before wiring it.
How Revolution uses it
Section titled “How Revolution uses it”The tower is a status indicator, not a scheduled instrument: there is no operation to call from a method. The driver maps Revolution’s own running/paused/error state onto tiers, and you decide which tier means what:
| Property | Purpose | Default |
|---|---|---|
| COM Port | Serial port the USB terminal element presents | — |
| Running Tier | Tier lit while the system is running | 3 |
| Paused Tier | Tier lit while the system is paused | 2 |
| Error Tier | Tier lit (blinking) when the system is in error | 1 |
Because the tiers are configuration rather than fixed, the five-tier tower can follow whatever convention your lab already uses. Running and Paused tiers are lit solid; the Error tier blinks so a fault is visually distinct. Each of the three must be a different tier (1–5) — the device rejects a configuration where two states share a tier.
Integration
Section titled “Integration”Revolution talks to the 640 over USB, presented to the host as a serial port.
Prerequisites
Section titled “Prerequisites”- The tower must be connected and its COM port known before the device is initialised.
- The tiers you nominate must physically exist on your tower — a three-element tower configured with an error tier of 5 has nothing to light.
- Running, Paused and Error must each be assigned a distinct tier.
If you need more of this instrument driven from a schedule, get in touch — the driver is extended on demand.