The AM16/32B multiplexer significantly increases the number of sensors that can be measured by a Campbell Scientific datalogger. It interfaces with the datalogger and adds terminals for wiring additional sensors of almost any type. Benefits and Features
- Significantly increases the number of sensors the datalogger can measure
- Multiplexes up to 32 sensors at a time
- Supports many types of sensors including thermistors, potentiometers, strain gages, vibrating wires, reflectometers, and soil moisture blocks
- Decreases the cost of cabling individual sensors on long wire runs
- Allows a relay address to be used to go directly to a specific channel—reducing power consumption and wear on the relay switches
- Protects the equipment from electrical surges by including gas tubes on all of the inputs and having a ground lug
- Prevents sensor-cable damage by providing strain relief for sensor leads and independent routing for sensor shield lines
- Eliminates the requirement for dc blocking capacitors for gypsum soil moisture blocks, significantly reducing sensor cost
Specifications:
- Power: 9.6 to 16 Vdc (under load)
- Scan Advance: Occurs on the leading edge of the clock pulse transition (from below 1.5 V to above 3.3 V)
- Minimum Clock Pulse Width: 1 ms
- Maximum Actuation Time for Relay: 20 ms
- Relay Operation: break before make
- Initial Relay Resistance, Closed: 0.1 Ohm
- Maximum Switching Current: 500 mA.
- Minimum Contact Life: 107 closures
- CE Compliance: EN 61326: 1998 EN 55022: 1998 Class B
- Surge: Complies with IEC61000-4-5, test level 3 (±2 kV, 2 ohms coupling impedance)
- CE Compliant
- Weight: 680 g
Dimensions
- Without Mounts: 22.0 x 10.1 x 6.6 cm
- With Mounts: 23.8 x 10.1 x 6.6 cm
Operating Temperature Range
- Standard: -25° to +50°C
- Extended: -55° to +85°C
ESD
- Air Discharge: Complies with IEC61000-4-2, test level 4 (±15 kV)
- Contact Discharge: Complies with IEC61000-4-2, test level 4 (±8 kV)
Current Drain (typical)
- Quiescent: < 210 µA
- Active: 6 mA
Reset Levels
- Inactive: < 0.9 V
- Active: 3.3 to 8 V
connect many sensors to a single datalogger Campbell
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National Research Centers (VNPC)
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