Overall

• Multiplexer is a device to extend data-logging channels to make single data-logger can log many sensors. Multiplexer logs data by switching operations of mechanical relays.


• With using multiplexer, additional input channels and controlling ports of the data-logger are unnecessary.


• Maximum channels able to added by MUX1632 depends on sensor type. In case of identical types of sensors, MUX1632 has a extendability as following :


• 64 single-ended sensors.


• 32 single-ended or differential sensors that required 2 wires. (e.g. half bridges)


• 32 vibrating wire sensors or 16 vibrating wire sensors including temperature signal.


• 16 single-ended or differential sensors that required 4 wires (e.g. full bridges)

General Specifications

• Contact resistance may increased when switching current is more than 30mA. It may cause negative effect for low voltage multiplexing.

Compatibility

Applications

• Measurements of civil works
• Geotechnical engineering · geostructural monitoring
• Meteorological ovservations
• Water level/quality monitoring and more

Wiring Connections

• Wiring connections between datalogger and multiplexer MUX1632 as following :

• Wiring connections between numbers of multiplexer MUX1632 as following :

Summary

• Datalogger operates multiplexer by its reset (RST) channel. Multiplexer idles as deactivation below 0.9Vdc signal and activating within 3.5 to 16Vdc continuous signal.


• During clock pulse input to the multiplexer on activation mode, terminals of COM and each channels are connected gradually from A to D at 4 wires 16 channels mode. And from AB to CD at 2 wires 32 channels mode.


• Other wiring connections and programming for data-logging are same as Campbell Scientific’s.

NOTES

• Check wiring connections before use.
• To stable data logging, room temperature (steady temperature) and low humidity environments are recommended.
• In case of operating in low voltage or high temperature environments may cause degradation of relay performance and it causes delay of data logging.
• In case of using nonstandard power source may cause damages to the product.
• 12 months warranty is provided after released. Warranty provided only in case of using for designed purpose correctly.
• Specifications, design and components can be changed without prior notice to improve its performances.