For Sales and Support, Contact Walker EMD • Toll-free: (800) 876-4444 • Tel: (203) 426-7700 • Fax: (203) 426-7800 • www.walkeremd.com
5
RESET AND PROGRAM OPTIONS
Connecting a wire from the RST EN (Reset Enable) or the HS (Program
Enable) Input terminals to Common will enable the front panel Reset or
Program buttons respectively.
Pulling the “RST.” input low causes the counter to reset. The “RST.” can be
pulled low by either a mechanical switch or solid-state transistor switch. The
Switch load is 15 µA (max. voltage drop 0.5 V) when ON. The OFF-state
leakage current must be less than 2 µA.
Note: The RC protection circuit on the “RST.” Input causes a delay of
approximately 15 msec in Reset response.
L.S. INPUT; CONTACT VERSIONS (30 Hz MAX.)
Connecting the “L.S.” Input to Common with a mechanical or solid-state
switch increments the counter. The switch load is 7
µ
A (max. voltage drop 0.5
V) when ON. The OFF-state leakage current must be less than 2
µ
A.
Reed switches, mercury wetted contacts, snap action limit switches, and
silver alloy relay contacts with wiping action are usually satisfactory for input
activation. Motor starter contacts, tungsten contacts, and brush-type contacts
should not be used.
