Technical Information - Omron H3CR-A Manual

Variation Due to Voltage Change
A change in operating time when the voltage of the control power
source changes within the permissible fluctuation range.
Formula for calculation (with operating time measured more than
5 time):
Variation due to temperature change
TMx -- TM
1 1
= !
x 100 (%)
TMs
where,
TM : Average value of operating times measured at rated volt-
1
age
TMx : Average value of operating times measured at a voltage
2
which causes the maximum deviation from TM
permissible fluctuation range.
TMs: Maximum scale time

Technical Information

Symbols Used in Internal Connection Diagram of Timers
Name and symbol
NO contacts Normally open contacts (A pair of
contacts which are normally open
when no relay input is applied.)
NC contacts Normally closed contacts (A pair of
contacts which are normally closed
when no relay input is applied.)
Transfer contacts Transfer contacts (NO and NC
contacts which have a common
contact terminal are collectively called
A
"transfer contacts".)
A variety of contacts shown in A and B
are all transfer contacts with NC
contact arranged either on the right
side or on the upper side.
B
Time-limit operating
A NO contacts
contacts
A A
B NC contacts
B
Time-limit resetting
A NO contacts
contacts
A A
B NC contacts
B
10
within the
1
Description
Time-limit operation,
time-limit resetting
contacts
Manually operated,
automatic resetting
contact
Synchronous motor
Relay
LED
Neon lamp
Name and symbol
A NO contacts
A A
B NC contacts
B
Contacts which reset upon release of
the hand, and used as the contacts to
operate pushbutton switches.
A NO contacts
A
B NC contacts
C Transfer contacts
B
C
A miniature timer which operates in
synchronization with power frequency.
An electromagnetic relay
Used to indicate the operating state of
the timer.
Used to indicate the operating state of
the timer.
Description