Model DI-5B42-01

Description

Each DI-5B42 2-wire transmitter interface module provides a single channel which accepts a 4 to 20 mA process current input and provides a standard +1 to +5V output signal (see block diagram). An isolated +20VDC regulated power supply is provided to power the current transmitter. This allows a 2-wire loop powered transmitter to be directly connected to the DI-5B42 without requiring an external power supply. The regulated supply will provide a nominal +20VDC at a loop current of 4mA to 20mA.

The DI-5B42 will provide a 1500V isolation barrier for non-isolated 2-wire field transmitters. It can also be used when additional isolation is required between an isolated 2-wire transmitter and the input stage of the control room computer. The voltage output is logic switch controlled, which allows these modules to share a common analog bus without the requirement of external multiplexers.

The DI-5B modules are designed with a completely isolated computer side circuit which can be floated to ±50V from Power Common, pin 16. This complete isolation means that no connection is required between I/O Common and Power Common for proper operation of the output switch. If desired, the output switch can be turned on continuously by simply connecting pin 22, the Read-Enable pin to I/O Common, pin 19.

A precision 20Ω current conversion resistor is supplied with the module. All field inputs are fully protected from accidental connection of power-line voltages up to 240VAC. The module has a 3dB bandwidth of 100Hz.

Signal filtering is accomplished with a six-pole filter, with two poles on the field side of the isolation barrier, and the other four on the computer side.

Accessories

Specifications

Input Range:	4mA to 20mA
Input Resistor:	Value: 20.00Ω Accuracy: ±0.1% Stability: ±10ppm/ºC
Loop Supply Voltage:	Nominal 20V at 4mA to 20mA
Isolated Excitation Protection:	Continuous: 240Vrms max Transient: ANSI/IEEE C37.90.1-1989
Input Protection:	Continuous: 240Vrms max Transient: ANSI/IEEE C37.90.1-1989
CMV, Input to Output:	Continuous: 1500Vrms max Transient: ANSI/IEEE C37.90.1-1989
CMR (50Hz or 60Hz):	100dB
NMR:	120dB per Decade above 100Hz
Accuracy:	±0.05% Span ±4µA RTI (Includes nonlinearity, hysteresis and repeatability; RTI=Referenced to input; VZ is the input voltage that results in 0V output.)
Nonlinearity:	±0.02% Span
Stability:	Input Offset: ±1µV/°C Output Offset: ±40µV/°C Gain: ±25ppm/°C of reading
Noise:	Input, 0.1 to 10Hz: 10nArms Output, 100kHz: 500µVrms
Bandwidth, -3dB:	100Hz
Response Time, 90% Span:	4ms
Output Range:	+1V to +5V
Output Resistance:	50Ω
Output Protection:	Continuous Short to Ground
Output Selection Time: (to ±1mV of Vout)	6µs at Cload = 0 to 2000pF
Output Current Limit:	±20mA max
Output Enable Control:	Max Logic “0”: +0.8V Min Logic “1”: +2.4V Max Logic “1”: +36V Input Current, “0”, “1”: 0.5µA
Power Supply Voltage:	+5VDC ±5%
Power Supply Current:	180mA at load of 20mA 100mA at load of 4mA
Power Supply Sensitivity:	±10µV/% RTI (RTI=Referenced to input.)
Mechanical Dimensions:	2.28" × 2.26" × 0.60" (58mm × 57mm × 15mm)
Operating Temperature:	-40ºC to +85ºC
Storage Temperature:	-40ºC to +85ºC
Relative Humidity:	0 to 95% Noncondensing
RFI Susceptibility:	±0.5% Span Error at 400MHz, 5W, 3ft

Compatible Products

Other Products in the Series

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