• 20-channel universal multiplexer
• Solid state relay
• Mainframe sold separately
• Scanning speed up to 450 channels per second
• 2-wire and 4-wire scanning

The Instek DAQ-900 is a solid-state relay module that provides two groups (A/B) of 10 2-wire channels each. All 20 channels are switchable to high (HI) and low (LO) inputs, providing fully isolated inputs for the built-in digital meter or external instruments. During 4-wire resistance measurements, the channels of group A are automatically paired with the channels of group B to provide power and sense connections. The module has a built-in cold junction reference, which can greatly reduce errors caused by thermal gradients when measuring thermocouples.

Please note: this item is only a module - mainframe is sold separately.

Instek offers several modules for use with its DAQ-9600 mainframe. The information below provides an overview of the main specifications for each. For more detailed information, please click here.

DAQ-900

• 20-Channel Universal Multiplexer (Solid State Relay)
• Scanning speed up to 450 channels per second
• 2-wire and 4-wire scanning
• Built-in temperature cold junction reference
• 120V switching

DAQ-901

• 20+2 Channels Universal Multiplexer (Armature Relay)
• Scanning speed can reach 80 channels per second
• 2-wire and 4-wire scanning
• Built-in temperature cold junction reference
• 300V switching
• The extra 2 channels can directly measure current (1A/per CH)

DAQ-903

• 40-Channel Single-Ended Multiplexer
• Scanning speed can reach 80 channels per second
• Single-wire switching is suitable for common-low applications
• Built-in temperature cold junction reference

DAQ-904

• 4 x 8 2-Wire Matrix
• 3ms switching speed
• 32 2-wire intersections
• 300V, 1A switching
• Up to 96 crosspoints (3 slots)

DAQ-909

• 8+2 Channels High Voltage High Current Multiplexer
• 3ms switching speed
• DC voltage 600V, current 2A
• 2-wire and 4-wire scanning
• Additional 2 channels can directly measure current (2A/per channel)

Note:

1. For the measurement of 100Ω and 1kΩ resistance ranges, it is recommended to use 4-wire resistance. The maximum resistance range of DAQ-900 is 1MΩ.

2. When measuring AC voltage, the input impedance will decrease with frequency. A source impedance of 5Ω or less will maintain specification over frequency. A source impedance of 50Ω or less will maintain specification in the 5 kHz range.

3. For DC voltage measurement, if the integration time is short and the source impedance is high, more stabilization time may be required.