问题：
所有的3RT2接触器和接触器组合都可以和3RK3 MSS、3SK1和3SK2安全继电器连接吗？Can all 3RT2 contactors and contactor assemblies be coected to 3RK3 MSS, 3SK1 and 3SK2 safety relays without any issue?
解答：
所有的3RT2接触器和接触器组合都可以和3RK3 MSS、3SK1和3SK2安全继电器连接。
当将3RT203.-. NB3.-….和 3RT203.-.KB4.-….连接到增强型带延时停机的3SK1122-.CB4.时，必须在3RT20的A1-A2端并联一个1.2kΩ的附加电阻。
原因：
3RT203.-. NB3.-…. 和3RT203.-.KB4.-…. 接触器线圈内置一个电容。这个电容会发送脉冲波形到接触器线圈并且干扰电子使能回路的暗测试。
出于这个原因，有必要在一些场合加装扩展电阻。
更多详细信息，请参见附件
(634.1 KB).
搜索条件：
工厂认证，证书
All 3RT2 contactors and contactor assemblies can be coected to 3RK3 MSS, 3SK1 and 3SK2 safety relays.
When coecting a 3RT203.-. NB3.-…. and 3RT203.-.KB4.-…. to a 3SK1 Advanced 3SK1122-.CB4. relay with adjustable OFF-delay time, an additional 1.2 kΩ resistor must be coected in parallel to A1-A2 on the 3RT20.
Reason:
A capacitor is built into the contactor coils of 3RT203.-. NB3.-…. and 3RT203.-.KB4.-…. units.
The capacitor shapes the pulses to the contactor coil and hampers the dark test for electronic enabling circuits.
For this reason, an external resistor is necessary in some cases.
For more details, please see the attached confirmation (634.1 KB).
Search terms:
Factory certification, certificate
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