SNE 4004K/KV
CONTACT EXPANSION
@ Y t
FUNCTION
SNE 4004K
Supply voltage to the SNE devices is routed via an enabling current path of a basic device. When the supply voltage is applied relays K1 and K2 switch into the ON position. After this switch-on phase the four enabling current paths 13/14, 23/24, 33/34, 43/44 (of the SNE 4004K) or 17/18, 27/28, 37/38, 47/48 (of the SNE 4004KV) are closed and the feedback current path Y1/Y2 is open. This is displayed through two LEDs that are assigned to relays K1 and K2.
When the enabling current paths of the basic device are opened through the operation of the emergency stop button, relays K1 and K2 on the SNE 4004K switch back into the OFF-position. The enabling current paths open and the feedback current path closes. Feedback current path Y1/Y2 prevents the basic device from switching on again before K1 or K2 releases.
APPLICATIONS
•Expansion of a basic device’s enabling current paths
•Contact expansion in safety equipment
•Up to PL d / Category 3 (EN ISO 13849-1)*
•Up to SILCL 2 (EN 62061)*
FEATURES
•Stop Category 0 and 1 according to EN 60204-1 (see “Function”)
•Single-channel or two-channel control
•SNE 4004K: 4 enabling current paths, undelayed
(NO contact)
3 signaling curent paths, undelayed (NC contact)
• SNE 4004KV: 4 enabling current paths, OFF-delayed (NO contact)
3 signaling current paths, OFF-delayed (NC contact),
Time buffering
* Depends on the category of the basic device or the safety control.
SNE 4004KV
The functions of this device correspond to those of the SNE 4004K. The SNE 4004KV is available with the following four OFF-delay times tR1: 0.5 s; 1 s; 2 s and 3 s. The device has an OFF-delay time that is enabled through capacitors.
This causes the OFF-delay time tR1 to elapse completely even in case of failure of the power supply (A1/A2). It cannot be reset before it has elapsed. Once the delay time has elapsed, relays K1 and K2 switch into the OFFposition. OFF-delay times of > 0 s correspond to stop category 1.
CIRCUIT DIAGRAMS
SNE 4004K |
SNE 4004KV |
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74 . safe RELAY
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