showstack / glossary / deadman
Deadman / hold-to-run 持壓運轉開關
A control that only allows motion while an operator is actively holding it, so releasing it, or gripping it in panic, stops the move. Standard on stage automation, hoist controllers and anything that moves scenery with people nearby.
中文
只有在操作者持續按住時才允許動作的控制器；放手或驚慌之下用力握死，動作即停止。舞台自動化、電動葫蘆控制器，以及任何在人員附近移動景物的設備都以此為標準配備。
Regional usage
| Where | Term | Note |
|---|---|---|
| UK | Deadman / hold-to-run | |
| US | Deadman switch / enable | |
| HK / TW | 持壓開關 / 安全開關 |
Easy to get wrong
A three-position enabling device is not the same as a simple hold-to-run button: it stops both when released AND when squeezed fully, which is the behaviour that matters when someone is startled.
Next to this
Sources
- ISO 13849-1 safety-related parts of control systems — ISO primary
Understand the mechanism
Something wrong, or missing?
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