ALLDAQ ADQ-SCU 2.3

The ALLDAQ SCU (SCU = Signal Conditioning Unit)

We have worked with some customers to design a module that offers a variety of options for adapting signals between the DUT and the actual measurement mimic.

Analogue inputs:

The intended measurement card, the ALLDAQ ADQ-348, has 32 differential channels, each of which can be individually conditioned using the SCU.

When a raw signal is connected to the SCU, it goes through the following steps:

Input coupling: You can set either DC or AC coupling here.

Attenuator: In order to reduce a high voltage to the level of the actual input, a gain between 0 and -47.95dB can be set here.

Adaption: To increase a low voltage to the level of the actual input, the respective gain is set here between +12.04 and +33.85dB.

Amplifier and Digital Filter: To refine the signal even further, a low-pass filter and further amplification can be added.

Analogue outputs

The analogue outputs are also individually customisable. Each of the 4 channels is divided into two paths, which in turn can be individually amplified, defined as a single-ended or differential output or switched as a 50 ohm termination. This results in 8 analogue channels.

Digital channels

All the functions that the ADQ-348 also offers are also provided by the ADQ-SCU. These include, for example:

• Triggers for the analogue inputs
• Triggers for the analogue outputs
• 1x 8 bit port digital inputs up to 35V
• 1x 8 bit port digital outputs up to 35V
• 2 x 8 bit port bidirectional digital I/Os, TTL
• Zähler
• PWM

 Power relay

For simple switching of loads, there are 8x 6A/30VDC relays, which are each switched in pairs. Here, the inputs and outputs are not connected to the measuring card.

Expansion boards

Since all SCU functions are controlled using I²C, it is possible to design additional functions and expansion modules. For example, 2 mezanine boards are currently available.

The power board:

• Two high-current relays up to 50A/100VAC per relay
• 4x additional power supply relays up to 5A/35VDC with a sense line at the input as a read/write option, e.g. to a laboratory power supply
• .
• 4-channel power measurement for the channels of the supply relays
• Up to 8x I²C addresses can be set via a rotary switch.

The relay board:

• 32 additional supply relays up to 5A/35VDC

Customised

Due to the flexibility offered by the control via I²C, it is possible to quickly realise customer-specific plug-on boards. Please also contact us if you would like to realise an adaptation to another board. Our team of hardware and software specialists will help you to realise your project quickly.