APPLICATION
The PD 640 is a general-purpose analogue I/O device with four I/O channels. Channel 1 and 2 may be configured for either input or output. Channel 3 and 4 are input channels. All 4 channels can be independently configured for either 0-20 mA or 4-20 mA signal types. This enables most standard type analogue transmitters for pressure, temperature, flow, etc., to be connected to the input channels, and, for example, analogue actuators, motor controllers, etc, to be connected to the output channels of the device.
Conversion from or to 0/4–20 mA is performed directly in the I/O channels, which means that process variables are read or written in floating-point engineering units. For example, a process controller or a PC can read the process value from a pressure transmitter, which is connected to an input channel, in bar, kPa, psi, or any other engineering unit, depending on the configuration.
It is used with a BM 014 Base module.
SPECIFICATIONS
Power Specifications
Power Supply DC: nom. 24.0 V, min. 18.0 V, max. 32.0 V
Ripple: max. 5%
Power consumption @ 24V DC
Operation: max. 25 mA
Current at power up: max. 60 mA
Analogue input (Ch. 1-4)
Signal type: Current (0 – 20 mA / 4 – 20 mA)
Calibration error: @ Tamb. 20 °C max. +/- 0.1 % of fullscale
Ambient temperature coefficient Tc: max. +/- 120 ppm / °C
Ambient temperature influence (ΔI): Tc x (Tambient – 20) x Input
Resolution: typ. 2 µA
Update time: fixed 0.8 Second
Voltage drop across input at 20 mA: nom. 1.2 V (60 Ω)
Current limiter (protection): typ. 25 mA
Filter for analogue input signal
Type: 4th order low pass
Time constant: configurable 3.0 s – 50.0 s
Gain error: max. +/- 0.1 %
Analogue output (Ch. 1 and 2)
Signal type: Current (0 – 20 mA / 4 – 20 mA)
Calibration error: @ Tamb. 20 °C max. +/- 0.25%
Ambient temperature coefficient Tc: max. +/- 160 ppm / °C
Ambient temperature influence (ΔI): Tc x (Tambient – 20) x Setpoint
Resolution: typ. 2 µA (For firmware versions earlier than 103: 100 µA)
Environmental Conditions
Ambient Temperature
Operating temperature: -25 °C – 70 °C
Storage temperature: -40 °C – 85 °C
Humidity
Relative humidity: max. 95%
Approvals
EMC EN61000-6-2, EN61000-6-3
Vibration IEC 60068-2-6
Frequency range: 2-100 Hz
Frequency / amplitude: 2-10 Hz: +/- 5.0 mm
10-100 Hz: +/- 2g
Sweep rate: max. 1 octave/min
Number of axes: 3 mutually perpendicular
