DI-8B-32 / DI-8B-42 Current input modules

The amplifier modules DI-8B-32/-42 convert commonly used 4 … 20 mA current signals to a proportional analog output voltage signal of 1 ... 5 V or 2 ... 10 V. Additionally, an isolated 15 V loop supply voltage (DI-8B42 only) is provided for transmitter excitation. A high-precision resistance for plugging into the board is supplied with the module. The galvanic isolation reduces noises and the effect of ground loops, which is barely avoidable in large and complex measuring setups.

• Input 4 ... 20 mA
• Sensor excitation 15 VDC (DI-8B-42 only)
• Output +1 ... +5 V or +2 ...+10 V
• Common mode rejection 100 dB
• Accuracy ±0.05 %
• Linearity ±0.02 %
• Bandwidth 100 Hz
• Supply voltage +5 V

DI-8B-34 Linearized 2- or 3-wire RTD modules

The amplifier modules DI-8B-34 are designed for Pt100 sensor excitation and signal conditioning. The Pt100 resistance value varies with the temperature, i. e. the module with Pt100 sensor provides an output voltage of 0 ... 5 V proportional to the temperature. Since the resistance gradient over temperature is not a linear line, the signal is linearized by the module.

• PT100 sensor input 2-,.3-wire
• Output 0 ... 5 V
• Common mode rejection 120 dB
• Accuracy ±0.05 %
• Linearity ±0.02 %
• Bandwidth 3 Hz
• Input resistance <30 Ohm
• Supply voltage +5 V

DI-8B-35 Linearized 4-wire RTD modules

The amplifier modules DI-8B-35 are designed for Pt100 sensor excitation and signal conditioning. The Pt100 resistance value varies with the temperature, i. e. the module with Pt100 sensor provides an output voltage of 0 ... 5 V proportional to the temperature. Since the resistance gradient over temperature is not a linear line, the signal is linearized by the module.

• Interface to 100 Ohm platinum resistance thermometer, 4-wire
• Output 0 ... 5 V
• Common mode rejection 120 dB
• Accuracy ±0.20 °C
• Bandwidth 4 Hz
• Input resistance 50 MOhm
• Supply voltage +5 V

DI-8B-36 Potentiometer input module

The module amplifier DI-8B-36 (potentiometer input module) filters, isolates, amplifies a single potentiometer input and provides an analog output signal (0 ... 5 V). This voltage output is controlled by a TTL logic input. The DI-8B-36 modules are designed with a completely isolated output circuit. The potentiometer excitation is provided by using two matched current sources. When using a 3-wire potentiometer, this method allows canceling the effects of lead resistances. The excitation currents are small which minimizes the self-heating of the potentiometer.

• Interface to potentiometers up to 10000 Ohm
• Output 0 ... 5 V
• Common mode rejection 120 dB
• Accuracy ±0.05 %
• Linearity 0.02 %
• Bandwidth 3 Hz
• Input resistance 50 MOhm
• Supply voltage ±5 V

DI-8B-38 Strain gauge input module

Each module amplifier DI-8B-38 (stain gauge input module) is a single input channel, which is filtered, isolated, amplified and converted to an analog output signal (0 ... 5 V or ±5 V). These modules can interface to full- or half-bridge strain gauges with a resistance of 100 ... 10000 Ohm or 300 ... 10000 Ohm. The bridge excitation is provided from the module with a stable 3.33 V or 10 V voltage source.

• Interface to full or half bridges
• Bridge excitation 3.33 V or 10.00 V
• Bridge resistance 100 ... 20000 Ohm or 300 ... 20000 Ohm
• Output ±5 V
• Isolation 1500 Vrms
• Input protection 240 Vrms
• Common mode rejection 100 dB
• Accuracy ±0.05 %
• Linearity 0.02 %
• Bandwidth 3 kHz
• Input resistance 50 MOhm
• Supply voltage +5 V