SNAP Analog Input Modules

Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com

SALES 800-321-6786 • 951-695-3000 • FAX 951-695-3095 • sales@opto22.com • SUPPORT 800-835-6786 • 951-695-3080 • FAX 951-695-3017 • support@opto22.com

© 2001–2014 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.

PAGE

11

0 to 25,000 Hz Analog Rate Input Module

Specifications

Description

The SNAP-AIRATE module provides two channels of

frequency-to-digital conversion. The nominal input range is 0

to 25,000 Hz with an over-range capability to 27,500 Hz. Nine

volts through a 4.7 K ohm pull-up resistor are provided

internally for use with devices that have open collector

outputs. This feature eliminates the need for the user to

provide the pull-up voltage supply and associated wiring,

barrier strips, etc.

The module works with TTL, CMOS, and open collector

outputs. Truly a two-wire hookup, the SNAP-AIRATE module is

ideally suited for use with a tachometer.

Please note that this module does not provide channel-to-

channel isolation. If you need isolated channels, see the SNAP

Isolated Analog Input Modules Data Sheet, form 1182.

Nominal Input Range

0 to 25,000 Hz

Input Over-Range

To 27,500 Hz

Resolution

1 Hz

Input Response Time(% of

span / delta Hz / delta time)

10.0% / 2,500 Hz / 0.1 sec

63.2% / 15.8 K Hz / 0.9 sec

99.0% / 24.75 K Hz / 4.2 sec

Data Freshness (Max)

126 ms

DC Common Mode Rejection

> -120 dB

AC Common Mode Rejection

> -120 dB at 60 Hz

Maximum Operating Common

Mode Voltage

250 V

Accuracy (% full scale)

±4 Hz or ±0.5% of the input fre-

quency (whichever is greater)

Drift: Gain Temperature Coeffi-

cient

200 ppm / °C

Drift: Offset Temperature Coef-

ficient

50 ppm / °C

Input Coupling

Single-ended AC (capacitor

coupled)

Input Amplitude

Sine wave

Square wave

2.5 V to 24 V p-p

0.5 V to 24 V p-p

Minimum Pulse Width

18 microseconds

Input Impedance (Inputs share

the same reference point.)

Pull-up Voltage

Pull-up Resistor

50 K ohms AC coupled

(-input to +input)

6 to 9 V

4.7 K ohms

Isolation

1500 V

Power Requirements

5 VDC (±0.15 V) at 190 mA

Operating Temperature

0 °C to 70 °C

Storage Temperature

-40 °C to 85 °C

Wire size

22 to 14 AWG

Torque, hold-down screws

4 in-lb (0.45 N-m)

Torque, connector screws

5.26 in-lb (0.6 N-m)

Agency Approvals

UL, FM, CE, RoHS, DFARS

Warranty

Lifetime

Part Number

Description

SNAP-AIRATE

0–25,000 Hz analog rate input