Rockwell Automation 57C421B Pulsetach Input Module/DCS 5000/AutoMax - Manual (Page 7)

1Ć1
1.0 INTRODUCTION
The products described in this instruction manual are manufactured
or distributed by Reliance Electric Industrial Company.
The Pulsetach Input module (M/N 57C421B) is used to accumulate
pulses from a photoĆelectric pulsetach. The pulsetach can be either
singleĆ or dualĆchannel with 5V or 12 VDC inputs. The module
contains a 24Ćbit counter, a 24Ćbit comparator, and a 16Ćbit internal
timer. It can accept an input frequency up to 150 kHz. Digital inputs
(5V to 12 VDC) are provided for a latch input, count stop input, and
origin input.
The module can be programmed to interrupt on a variety of
conditions: a periodic time interval, an external latch input, an
external count stop input, a marker (Z) pulse and origin input, or a
comparator equal condition.
In order to use interrupts on this module it must be located in a rack
containing at least one Processor module. Interrupts cannot be
used with Pulsetach Input modules located in remote racks.
This manual describes the functions and specifications of the
module, how to install and service the module, and programming
information.
1.1 Related Publications
You must be familiar with the instruction manuals which describe
your system configuration. These may include, but are not limited
to, the following:
D JĆ3675 AutoMax ENHANCED BASIC LANGUAGE
INSTRUCTION MANUAL
D JĆ3676 AutoMax CONTROL BLOCK LANGUAGE
INSTRUCTION MANUAL
D JĆ3650 AutoMax PROCESSOR MODULE INSTRUCTION
MANUAL
D J2Ć3094 AutoMax ENHANCED LADDER LANGUAGE EDITOR
D Your Resource AutoMax PROGRAMMING EXECUTIVE
INSTRUCTION MANUAL.
D Your personal computer and DOS operating system manuals.
D IEEEĆ518GUIDE FOR THE INSTALLATION OF ELECTRICAL
EQUIPMENT TOMINIMIZE ELECTRICAL NOISE
INPUTS TO CONTROLLERS FROM EXTERNAL
SOURCES
The thick black bar shown on the rightĆhand margin of this page will be used
throughout this instruction manual to signify new or revised text or figures.