Schleicher SNO-2012-120 overview
Schleicher SNO 2012-120 120V AC Safety Switching Device The Device is a dual-channel safety switching device for emergency stop equipment conforming to EN 60204...
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Manufactured bySchleicher
Product groupModules
DescriptionSchleicher SNO 2012-120 120V AC Safety Switching Device
OverviewThe Device is a dual-channel safety switching device for emergency stop equipment conforming to EN 60204-1, with self-monitoring on each ON-OFF cycle and positively driven relays. After the supply voltage is applied to terminals A1/A2, and if the E -Stop momentary contact switch is not activated, the control logic is ener gized with the RESET switch (LED K3 is illuminated). This triggers the internal relays K1 and K2. The latter becomes self locking through their own contacts. After this switch -on phase, the six enabling current paths, which are intended for the output, are closed (terminal connections 13 to 63 / 14 to 64) and the four control contacts are opened (terminal connections 71 to 01 / 72 to 02). Five LEDs provide a display, and these LEDs are associated with the safety channels CH1, CH2 and the supply voltage. If the E -Stop switch is activated, the current leads for the K1 and K2 relays are interrupted. The enabling current paths at the output are opened and the control contacts are closed. The control contacts 71/72 and 81/82 are related to the internal relay K1, 91/92 and 01/02 to the internal relay K2. This feature allows an additional diagnosis of the internal status of the device by using external devices conected to these terminals. With a two -channel connection of the E -Stop switch and cross monitoring wiring of the E -Stop circuit, it is possible to monitor the presence of a short circuit between the connected cables (cross monitoring) and ground faults. An internal electronic circuit protects the emergency -stop relay from damages. After eliminating the fault the item will return into operation after about 3 s.
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Schleicher
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Total 1 item.
| # | Name |
|---|---|
| 1 | SNO2012120 |
| 2 | SNO 2012-120 |