Specifications

Publication 1794-SG002D-EN-P - May 2012

98 Select FLEX Ex I/O Modules

1797-OE8H Output Voltage/Current Capability

Counter I/O Module

Ideal for applications requiring rotational control, the FLEX Ex counter is

essentially a tachometer with the capability of reporting frequency, acceleration,

and direction. Outputs are activated by alarms. Input devices range from

magnetic pickup to flowmeters, to incremental encoders to proximity detectors.

This intelligent I/O module is designed to perform high-speed frequency

algorithms. The module provides two frequency inputs, two gate inputs, and two

outputs. The frequency inputs are capable of accepting frequencies up to 32 kHz.

The module accepts and returns binary data.

The counter measures frequency over a user-specified time interval. A frequency

calculation can start before the time interval clock is synchronized with the

frequency input to count over a user-selected sampling time or a user-defined

number of frequency input pulses. All power for input devices (24V DC) is

supplied by the module.

1797-IJ2 2 Input Frequency Counter Module

• Software configurable frequency operating mode, with independent

selections per frequency input

• Frequency inputs, two gate inputs, and two outputs

• Functional data: four selectable ranges: 50 mV; 500 mV (magnetic pickup);

flowmeter; and NAMUR

• Provides IS power to drive up to two NAMUR and two flowmeter

frequency inputs and/or contact switches and NAMUR gate inputs

• NAMUR lead breakage indication for any lead, signal to the backplane

and LED (per channel) blinking red for fault

• NAMUR lead breakage defeat on per channel basis via module data table

(NAMUR inputs only)

• Frequency count range up to 32 kHz

...

Voltage