Signal Line Monitor
The SLM3 is a signal line monitoring device used for 2 wire signal monitoring. The SLM3 is capable of identifying up to 256 unique trip locations via the 2 wire signal line of stop switches and blocked chute switches. Alternatively the module can be used to monitor long line health.
The SLM3 uses a very robust trip location detection scheme that is well suited for noisy environments and high impedance installations.
The SLM3 module can be used for two separate functions.
1. The SLM3 can identify up to 256 unique trip locations on a two wire system. This func tion requires the use of one switch and one A00921 SLM3 addressable node per trip location. The BK300/BK400 are reccom mended for use as the switching device. In this mode of operation the A00718B SLC2 module is used to detect signal line discontinuities and activate the SLM3’s trip location detection function.
2. The SLM3 can monitor the health of a two wire system. This function requires the use of one A00921 SLM3 Addressable node. In this mode the SLM3 can operate as a standalone unit without the use of the A00718B SLC2.
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