F39-EU1E Omron, F39-EU1E Datasheet - Page 129

• Manufacturer Part Number: F39-EU1E
• Description: F3S-B OPTIONAL PROGRAMMING KIT
• Manufacturer: Omron

Specifications of F39-EU1E

• Leaded Process Compatible: No
• Peak Reflow Compatible (260 C): No
• Light Curtain Type: Safety
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: [phone]-Outside Local Area: [phone]-www.stevenengineering.com
➌-➀-6 Connecting Loads for Multi-pole Relays
Connect multi-pole Relay loads according to diagram "a" below to
avoid creating differences in electric potential in the circuits. If a
multi-pole Relay is used with an electric potential difference in the
circuit, it will cause short-circuiting due to arcing between contacts,
damaging the Relays and peripheral devices.
➌-➀-7 Motor Forward/Reverse Switching
Switching a motor between forward and reverse operation creates an
electric potential difference in the circuit, so a time lag (OFF time)
must be set up using multiple Relays.
➌-➀-8 Power Supply Double Break with Multi-pole Relays
If a double break circuit for the power supply is constructed using
multi-pole Relays, take factors into account when selecting models:
Relay structure, creepage distance, clearance between unlike poles,
and the existence of arc barriers. Also, after making the selection,
check operation in the actual application. If an inappropriate model is
selected, short-circuiting will occur between unlike poles even when
the load is within the rated values, particularly due to arcing when
power is turned OFF. This can cause burning and damage to
peripheral devices.
➌-➀-9 Short-circuiting Due to Arcing between NO and NC
With Relays that have NO and NC contacts, short-circuiting between
contacts will result due to arcing if the space between the NO and NC
contacts is too small or if a large current is switched.
Do not construct a circuit in such a way that overcurrent and burning
occur if the NO, NC, and SPDT contacts are short-circuited.
Example of Incorrect Circuit
Example of incorrect circuit
Example of Correct Circuit
Example of correct circuit
Arc short-circuiting occurs.
X
Power
supply
a. Correct Connection
Contacts in SPDT Relays
1
X
X
X
X
1
2
2
1
Load
Load
Load
Arc short-circuiting occurs.
M
Load
X
2
M
Load
B
http://www.ia.omron.com/
B
Load
Incorrect
Correct
Incorrect
Correct
supply
b. Incorrect Connection
Motor
Power
X
X
X
X
1
2
1
2
Load
operation
Forward
Load
ON
ON
OFF
time
Load
OFF time
operation
Reverse
ON
OFF
time
Load
ON
operation
Forward
ON
➌-➀-10 Using SPST-NO/SPST-NC Contact Relays as an
Do not construct a circuit so that overcurrent and burning occur if the
NO, NC and SPDT contacts are short-circuited.
Also, with SPST-NO/SPST-NC Relays, a short-circuit current may
flow for forward/reverse motor operation.
➌-➀-11 Connecting Loads of Differing Capacities
Do not have a single Relay simultaneously switching a large load and
a microload.
The purity of the contacts used for microload switching will be lost as
a result of the contact spattering that occurs during large load
switching, and this may give rise to contact failure during microload
switching.
➁ Input Circuits
➌-➁-1 Maximum Allowable Voltage
The coil's maximum allowable voltage is determined by the coil
temperature increase and the heat withstand temperature of the
insulation material. (If the heat withstand temperature is exceeded, it
will cause coil burning and layer shorting.) There are also important
restrictions imposed to prevent problems such as thermal changes
and deterioration of the insulation, damage to other control devices,
injury to humans, and fires, so be careful not to exceed the specified
values provided in this catalog.
➌-➁-2 Voltage Applied to Coils
Apply only the rated voltage to coils. The Relays will operate at the
must-operate voltage or greater, but the rated voltage must be
applied to the coils in order to obtain the specified performance.
➌-➁-3 Changes in Must-operate Voltage Due to Coil
It may not be possible to satisfy this catalog values for must-operate
voltages during a hot start or when the ambient temperature exceeds
23°C, so be sure to check operation under the actual application
conditions.
Coil resistance is increased by a rise in temperature causing the
must-operate voltage to increase. The resistance thermal coefficient
of a copper wire is approximately 0.4% per 1°C, and the coil
resistance also increases at this percentage.
This catalog values for the must-operate voltage and must-release
voltage are given for a coil temperature of 23°C.
➌-➁-4 Applied Voltage Waveform for Input Voltage
As a rule, power supply waveforms are based on the rectangular
(square) waveforms, and do not operate in such a way that the
voltage applied to the coil slowly rises and falls. Also, do not use them
to detect voltage or current limit values (i.e., using them for turning ON
or OFF at the moment a voltage or current limit is reached).
This kind of circuit causes faulty sequence operations. For example,
the simultaneous operability of contacts may not be dependable (for
multi-pole Relays, time variations must occur in contact operations),
and the must-operate voltage varies with each operation. In addition,
the operation and release times are lengthened, causing durability to
drop and contact welding. Be sure to use an instantaneous ON/OFF.
(c)Copyright OMRON Corporation 2007 All Rights Reserved.
Temperature
SPDT Relay
Power supply
(Short-circuit current)
Precautions for All Relays
L
C-7