What happens when it is pressed
While the bus is moving, a passenger presses this button. The vehicle makes an emergency brake stop, this unit's work indicator flashes, the warning lamps operate, and the high-low horn sounds continuously, until the driver-area release is pressed and the vehicle's functions return to normal. This unit's output is the low-level signal at 10 mA.
Stop-request and emergency stop are not the same button
A stop-request button, such as the JDK-2306 wired stop-request button or the TDK-2406 / 2407 wireless stop-request button, asks the driver to stop at the next stop. That control is specified and wired separately from this button. The bus stop request button buyer guide covers that service control.
Connector and pinout
The unit uses two Sumitomo connectors. 6098-5310 carries the signal output and the button backlight. 6098-0240 carries the work-indicator supply.
| Pin | Signal | Steady current | Static power | Note |
|---|---|---|---|---|
| 1 | Signal output | 10 mA | — | Low level |
| 2 | Backlight supply | 10 mA | Stated by the supplier | 24 V |
| 3 | Backlight ground | — | — | — |
| 4 | Ground | — | — | — |
| Pin | Signal | Steady current | Static power | Note |
|---|---|---|---|---|
| 1 | Ground | — | — | — |
| 2 | Indicator supply | — | Logic power | Body controller supplies the flash logic |
Environmental and EMC testing
Environmental screening is in our in-house lab, and EMC testing is at an accredited third-party laboratory when a programme requires it.
Common questions
What is EDSS, and what does the TDK-2419 do in it? EDSS — Emergency Driving Stop System — is the bus function that makes an emergency brake stop. The TDK-2419 is the passenger-area button that sends the request. A separate driver-area button releases it.
Is the TDK-2419 a single unit or the whole EDSS system? It is one passenger-area unit, not the whole EDSS. How many units a bus carries, and where they mount, is set per programme.
How is this different from a stop-request button? A stop-request button asks the driver to stop at the next stop. This button calls an emergency brake stop of the bus. The two are specified and wired separately.
What connector and mounting does it use? Two Sumitomo connectors: 6098-5310, 4-pin, for the signal and the backlight, and 6098-0240, 2-pin, for the indicator supply. Send the panel cut-out with the enquiry.
What do you need to quote the TDK-2419? The mounting position and panel cut-out, the EDSS control and body controller it must wire to, and expected annual volume. Drawings welcome.
