Model DI-5B45-04

Description

Each DI-5B45 frequency input module provides a single channel of frequency input which is isolated and converted to a high level analog voltage output. This voltage output is logic switch controlled, which allows these modules to share a common analog bus without the requirement of external multiplexers (see block diagram).

The frequency input signal can be a TTL level signal or a zero-crossing signal. Terminal 3 (+In) on the field side terminal block is the “common” or ground connection for input signals. A TTL signal is connected from terminal 2 (-In) to terminal 3 (+In), while a zero crossing signal is connected from terminal 4 (+EXC) to terminal 3 (+In). Input circuitry for each of the signal types has hysteresis built in. An input signal must cross entirely through the hysteresis region in order to trigger the threshold comparator.

A 5.1V excitation is available for use with magnetic pickup or contact-closure type sensors. The excitation is available on pin 1 (-EXC) and the excitation common is pin 3 (+In). 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 special circuit in the input stage of the module provides protection against accidental connection of power-line voltages up to 240VAC.

Accessories

Specifications

Input Range:	0 to 5kHz
Output Range:	0 to +5V
Excitation:	+5.1Vdc @ 8mA
Input Threshold:	Zero Crossing Minimum Input: 60mVp-p Maximum Input: 350Vp-p Minimum Pulse Width: 4µs TTL Input Low: 0.8V max TTL Input High: 2.4V min
Input Hysteresis:	Zero Crossing: 0.04V TTL: 1.5V
Input Resistance:	Normal: 100kΩ Power Off: 100kΩ Overload: 100kΩ
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 (50 or 60Hz):	120dB
Accuracy:	±0.05% Span (Includes nonlinearity, hysteresis and repeatability.)
Nonlinearity:	±0.02% Span
Stability:	Offset: ±40ppm/°C Gain: ±40ppm/°C
Noise:	Output Ripple: <10mVp-p @ Input>2% span
Response Time:	DI-5B45-01, -02: 300ms DI-5B45-03: 170ms DI-5B45-04, -05: 90ms DI-5B45-06, -07, -08: 20ms
Output Range:	0V 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 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:	110mA
Power Supply Sensitivity:	±150µV/%RTO (RTO=Referenced to Output)
Environmental:	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
Mechanical Dimensions:	2.28" × 2.26" × 0.60" (58mm × 57mm × 15mm)

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