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16- or 32-Channel Relay Multiplexer AM16/32B

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.

16- or 32-Channel Relay Multiplexer AM16/32B

Contacts and Location

Description

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

Specification

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

Services

connect many sensors to a single datalogger Campbell

Status

"engaged in service"

Funding Source

National Research Centers (VNPC) -
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