Omron H3DR-A User Manual

10
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
5time):
Variation due to temperature change
=
!
x 100 (%)
TMx
1
-- T M
1
TMs
where,
TM
1
: Average value of operating times measured at rated volt-
age
TMx
2
: Average value of operating times measured at a voltage
which causes the maximum deviation from TM
1
within the
permissible fluctuation range.
TMs: Maximum scale time
Technical Information
Symbols Used in Internal Connection Diagram of Timers
Name and symbol Description Name and symbol Description
NO contacts Normally open contacts (A pair of
contacts which are normally open
when no relay input is applied.)
Time-limit operation,
time-limit resetting
contacts
A
A
NO contacts
NC contacts Normally closed contacts (A pair of
contacts which are normally closed
when no relay input is applied.)
A
B
B
NC contacts
Transfer contacts
A
B
Transfer contacts (NO and NC
contacts which have a common
contact terminal are collectively called
“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.
Manually operated,
automatic resetting
contact
A
B
C
Contacts which reset upon release of
the hand, and used as the contacts to
operate pushbutton switches.
A
NO contacts
B
NC contacts
C
Transfer contacts
Time-limit operating
contacts
A
A
NO contacts
Synchronous motor A miniature timer which operates in
synchronization with power frequency.
A
B
B
NC contacts
Relay An electromagnetic relay
Time-limit resetting
contacts
A
A
NO contacts
LED Used to indicate the operating state of
the timer.
A
B
B
NC contacts
Neon lamp Used to indicate the operating state of
the timer.

Omron H3DR-A Specifications

General

Brand	Omron
Model	H3DR-A
Category	Timer
Language	English