Appendix; Cni4 Index Base - Honeywell CNI4 Operating And Installation Manual

9 Appendix

9 Appendix

9.1 CNI4 Index Base

When the UMB index mount option is included with the instrument, a rotating magnet and several
magnetic sensor switches will be present inside the enclosure as seen below. For convenience, wires from
the sensor switches are pre-wired from the factory to the pulse counting input terminal block TB4. In the
unlikely event that one of the two reed switches should fail, the redundant input channel will continue to
register accurate counts.
The illustration below shows the CNI4 with the rotary magnet and dual reed switches.
Figure 9-1: Index Base with Magnetic Switches
For the sake of clarity this illustration does not show the routing of wires from the sensor switches.
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