Model DI-5B33-01

Description

Each DI-5B33 True RMS input module provides a single channel of AC input which is converted to its True RMS dc value, filtered, isolated, amplified, and converted to a standard voltage output (see block diagram).

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.

The field voltage input signal is processed through a preamplifier and RMS converter on the field side of the isolation barrier. The converted dc signal is then chopped by a proprietary chopper circuit and transferred across the transformer isolation barrier, suppressing transmission of common mode spikes and surges. The computer side circuitry reconstructs, filters and converts the signal to industry standard outputs. Modules are powered from +5VDC, ±5%.

Accessories

Specifications

Input
Signal Range:	0mV to 100mV RMS
Standard Frequency Range:	45Hz to 1000Hz
Extended Frequency Range:	1kHz to 20kHz
Impedance:	1MΩ ±1% shunted by 100pF
Coupling:	AC
Protection: (Module Rating Only)	Continuous: 480V (Peak AC & DC) Transient: ANSI/IEEE C37.90.1-1989
Accuracy*
Sinusoid:	50/60Hz: ±0.25% Span 45Hz to 1kHz: ±0.25% Reading Additional Factor 1kHz to 20kHz: ±0.75% Reading Additional Factor
Non-Sinusoid:	Crest Factor = 1 to 2: ±0.05% Reading Additional Error Crest Factor = 2 to 3: ±0.15% Reading Additional Error Crest Factor = 3 to 4: ±0.30% Reading Additional Error Crest Factor = 4 to 5: ±0.40% Reading Additional Error
Vs. Temperature:	±100ppm/°C
Isolation
Input to Output, Input to Power:	Continuous: 1500Vrms max Transient: ANSI/IEEE C37.90.1-1989
Output to Power (Continuous):	50Vdc max
Output Enable Control
Selection Time:	6.0µS @ Cload = 0 to 2000pF
Voltage:	Max Logic “0”: +0.8V Min / Max Logic “1”: +2.4V / +36V
Current, “0,1”:	0.5µA
Other
Rejection (50-60Hz Common Mode):	100dB
Response Time (0 to 99%):	<400ms
Loop Voltage:	+14Vdc min, +48Vdc max
Load Resistance (maximum):	(Loop Voltage -14) / (Loop Current)
Supply Voltage:	+5VDC ±5%
Supply Current:	30mA
Supply Sensitivity:	±200µV/% RTI
Environmental:	Operating Temperature: -40ºC to +85ºC Storage Temperature: -40ºC to +85ºC Relative Humidity: 0 to 90% Noncondensing
Mechanical Dimensions:	2.28" × 2.26" × 0.60" (58mm × 57mm × 15mm)

* At standard 60Hz factory calibration. For 10 to 100% rated span. Add an additional 0.25% error for 0 to 10% Span measurements. Accuracy includes nonlinearity, hysteresis and repeatability but not source or external shunt inaccuracy (if used).

Compatible Products

Other Products in the Series