GT3A-1 IDEC Corporation, GT3A-1 Datasheet - Page 20

• Manufacturer Part Number: GT3A-1
• Description: Gt3 Series Multi-function Timers
• Manufacturer: IDEC Corporation

Temperature Error
This indicates the influence caused by the change in temperature
during operation within operating temperature. This is shown with
the variance of operation time.
= ±
Setting Error
This indicates the gap between actual operation time and that on
scale. Calculated from below formula, this is measured at any point
but more than one-third of the maximum scale value.
= ±
Load Current
The rated current of the contact (or control output) should not be ex-
ceeded. Especially for inductive, capacitive, and incandescent lamp
loads, the inrush current as large as a few to several tens times the
rated current may cause welded contacts and other troubles. The
amount of inrush current as well as steady-state current must be
taken into consideration.
Contact Protection
Switching an inductive load generates a counter-electromotive force
in the coil. The counter emf will cause arcing, which may shorten the
contact life. Application of a protection circuit is recommended for
contact protection.
Rest Time
When turning power off after time-out or during operation, allow a
rest time longer than the reset time to restart. (Each model has a
different reset time.)
Continuous Energizing
Continuous energizing for a long period of time may damage the
electrical characteristics of the timer because of internal heating.
Use an additional relay to the output circuit and refrain from continu-
ous energizing of the timer.
Dielectric Strength Test
When performing an insulation resistance or dielectric-strength test
on control panels containing timers, make sure that the dielectric
strength of the timer is not exceeded. In case the dielectric strength
is exceeded, remove the timers from the panels.
Tt: Average of operation times at temperature t
T
20
Average of measured values - Set value
Tt - T
: Average of operation times at reference temperature (20ºC)
T
20
20
× 100 (%)
Maximum scale value
× 100 (%)
GT3
Series
Operating Environment
Temperature and Humidity
Use the timer within the operating temperature and operating hu-
midity ranges and prevent freezing and condensation. After storing
below the operation temperature, leave the timer at room tempera-
ture for a sufficient period of time before use.
Environment
Prevent a corrosive gas such as sulfurous or ammonia gas, organic
solvents (alcohol, benzine, thinner, etc.), strong alkaline substances
or strong acids from touching to the timer, and do not use the timer
in such an environment. Keep the timer from water splashes or
steam.
Vibration and Shock
Since excessive vibrations or shocks cause the output contacts to
open, the timer should be used within the operating extremes of
vibration and shock resistance. Use of hold-down springs is recom-
mended for secure mounting on sockets.
Noise and Static Charge
Check the operation of the timer before using in an environment
with a lot of noise. Install the input signal source, input signal wiring
and timer away from noise source and high-voltage wire with noise
as much as possible. Also, in case of using the timer under the envi-
ronment with multiple static charge (pipe transportation of molding
material, power/liquid material, etc.), place the timer away from such
static charge source as well.
Others
•
•
Multi-function Timers [Instructions]
The GT3F does not read the preset values of each selector after
power is turned off. Note that minimizing the preset time does not
shorten the delay time after power is turned off.
To make a sequence circuit by connecting timers and relays,
check the timer operation sufficiently in consideration of the reset
time of the timer.
1085
Flush
Silhouette
Control
Units
Display
Lights
Display
Units
Safety
Products
Terminal
Blocks
Comm.
Terminals
AS-Interface
Relays &
Timers
Sockets
Circuit
Protectors
Power
Supplies
PLCs &
SmartRelay
Operator
Interfaces
Sensors
Control
Stations
Explosion
Protection
References