The Analog Conditioning Board allows direct monitoring and control of 24 analog input/output signals from your real-world sensors and actuators. This highly flexible yet easy-to-use board lets you amplify, attenuate, filter, and convert incoming analog voltage or current signals to facilitate automated data acquisition.
The board provides easily customized signal conditioning of the QED Board's 24 analog I/O lines. The digital-to-analog (D/A) converter outputs can be scaled up to a 0-10 volt range to directly drive analog actuators. With the installation of onboard jumpers, you can even convert two pairs of 8 bit resolution D/A converters into two 12 bit resolution D/A converters. And 4 to 20 mA signaling is no problem; the board supports two output channels and two input channels for noise-immune current loop signaling schemes.
To measure temperature, you can directly connect thermistors or even thermocouples. Onboard cold junction compensation and amplification makes accurate temperature measurement a snap.
Together with the QED Board and the Digital I/O Board, the Analog Conditioning Board yields a complete industrial control system with amazing power and flexibility.
The Analog Conditioning Board processes the 8 D/A outputs and 16 A/D inputs of the QED Board. It implements variable gain amplification, voltage-to-current and current-to-voltage conversion, optional filtering, and cold junction compensation for thermocouples.
The Analog Conditioning Board allows you to directly connect to most analog sensors and actuators without the need for any additional electronic components.
All analog inputs and outputs are protected by current-limiting resistors.
A highly stable 4.096 V reference diode on the Analog Conditioning Board provides the reference voltage for the QED Board's 8 bit and 12 bit A/D converters.
The 12 bit A/D inputs to the QED Board are clamped to prevent loss of accuracy due to out-of-range input voltages.
All of the required software drivers are pre-coded
Thermocouple Compensation
An onboard cold junction compensator allows thermocouples to be directly connected to the Analog Conditioning Board.
Jumper selectable for type J, K, T, R, S, or E thermocouples.
12 Bit Resolution Analog Inputs
Two analog inputs are conditioned by instrumentation amplifiers which provide differential amplification with well controlled gains of 10 or 100, or resistor-programmable gains between 10 and 100. These have a ±25 volt common mode input range and are suitable for unipolar, bipolar, single-ended or differential signals.
Two analog inputs are conditioned by differential amplifiers with programmable gain or attenuation.
Three analog inputs are conditioned by single-ended amplifiers with resistor-programmable gain or attenuation.
One analog input is unamplified; it can be used to calibrate the 12 bit D/A converters.
The instrumentation and differential amplifiers can condition a wide variety of single-ended and differential transducers including photodiodes, resistive- and voltage-output sensors, and balanced bridge configurations.
All amplified channels can be optionally lowpass filtered by installing onboard capacitors.
Power
Requires 15 to 38 volts unregulated DC input.
Onboard regulators derive regulated supplies at 13.2 and - 5 volts.
Onboard circuitry produces a buffered temperature-stable 4.096 volt reference. It can source up to 10 mA and is suitable for use as an excitation source.
Analog Outputs
Each of the eight analog outputs can be scaled to 0-5 V or
0-10 V or anything in between by simply installing onboard gain resistors.
Voltage outputs can drive 1 kOhm loads at 10 volts.
Current outputs can source up to 20 mA at 5 volts.
Two pairs of 8 bit D/A converters can be optionally combined to create two calibrated D/A outputs with 12 bit resolution.
Two analog outputs can be optionally configured as 0-20 mA or 4-20 mA outputs to implement an industry-standard current loop signaling scheme.
Connectors
The Analog Conditioning Board connects to the Analog I/O connector of the QED Board via a 40 pin ribbon cable.
A 40 pin Analog Field Connector brings out all of the field connections.
The Analog Conditioning Board can be plugged into the Industrial Control System backplane board providing convenient screw terminal connections for the field signals.
The Analog Field Connector is pin-compatible with Gordos™ 16-channel mounting boards for optically-isolated analog I/O modules.
A 5-position screw terminal connector brings out onboard power and reference voltages.
8 Bit Resolution Analog Inputs
Three analog inputs are conditioned by single-ended programmable gain amplifiers with optional lowpass filtering.
Five analog inputs are unamplified; of these, three are configured with optional excitation to allow easy interface to resistive transducers such as thermistors.
Provides customized signal conditioning of the QED Board's 24 analog I/O lines. The 8 analog outputs can be scaled to a 0-10 Volt range, and the 16 analog inputs are conditioned by instrumentation amps, differential amps, and op amps with selectable gain, filtering and excitation. Two 4 to 20 mA signaling channels are supported, and onboard cold junction thermocouple compensation makes temperature measurement easy. The board plugs directly into the QED Industrial Control System backplane, or it can interface to the QED analog I/O connector via a 40-pin ribbon cable.
