Panasonic Corporation Automation Controls Business Unit industrial.panasonic.com/ac/e/
CAUTIONS FOR USE
ASCTB246E 201302-T
CAUTIONS FOR USE
RT-3 UNIT RELAY
4-POINT TERMINAL
1. Never install modules (relays) into
this product other than those
designated. Doing so will cause
malfunction, breakdown, and
breakdown of the connected product.
2. If a unit is dropped be sure to check
its external appearance and
characteristics before using it.
3. The operation and return voltage
values when equipped with PA relays
are based on the relay terminals being
face down. (RT-3 Unit relay (PA type),
4-point Terminal)
4. Switching lifetime (PA relay)
This characteristic depends on the relay
and is effected by coil driving circuit, load
type, activation frequency, activation
phase, ambient conditions and other
factors.
Also, be especially careful of loads such
as those listed below.
1) When used for AC load-operating and
the operating phase is synchronous,
rocking and fusing can easily occur due
to contact shifting.
2) Frequent switching under load
condition
When high frequently switched under
load condition that can cause arc at the
contacts, nitrogen and oxygen in the air is
fused by the arc energy and HNO
3 is
formed. This can corrode metal materials.
Three countermeasures for these are
listed here.
(1) Incorporate an arc-extinguishing
circuit.
(2) Lower the operating frequency
(3) Lower the ambient humidity
5. Operating environment
1) Keep the product as far way as
possible from power cables, high tension
equipment, power equipment, equipment
with transmitting devices such as
amateur radios, or equipment which
generates a large switching surge.
2) The main unit is made of resin;
therefore, do not use it in areas where it
may come in contact with (or be exposed
to) organic solvents such as gasoline,
thinner, and alcohol, or strong alkaline
substances such as ammonia and
caustic soda.
3) Do not use the product in areas where
it may be exposed to flammable gases,
corrosive gases, excessive dust, or
moisture, or areas where it may be
subjected to strong vibration or shock.
6. Installing and removing the module
1) Firmly insert the module into the
socket with the terminals going in the
direction of the blade receptacles.
2) The module can be easily removed
using the removal key.
(1) Insert the removal key into the socket
slots.
(2) Pull the removal key up to remove the
module.
(3) Slide the removal key off of the
module.
7. Wiring and circuit configuration
1) Perform wiring according to the
internal schematic. Take care not to make
any mistakes.
In particular, with the RT-3 Unit relay (PA
relay type) and 4-point terminal, be
careful of the polarity on the output side
when equipped with AQZ10∗D (DC type).
Also, with the RT-3 Unit relay (Power
PhotoMOS type), be careful of the
polarity on the output side of the DC type
(RT3SP1-∗∗V for type equipped with
AQZ102).
2) We recommend the use of wire-
pressed terminals for connection to the
terminal portion.
• Example of applicable wire-pressed
terminal
3) When the load is inductive, limit spike
voltages generated from the load to less
than the maximum load voltage.
Typical circuits are shown below.
(1) Add a clamp diode to the load.
(2) Add an R-C snubber to the load.
(3) Add a varistor between the output
terminals.
4) Even if spike voltages generated from
the load are limited by a clamp diode or
R-C snubber, inductances in long circuit
wires will still create spike voltages.
Keep wires as short as possible to
minimize inductance.
Company
Name
Part Name
Applicable wire-
pressed terminal
J.S.T. Mfg
Co., Ltd.
1.25 to C3A 0.25 to 1.65mm
2
Output terminals
Load or
DC only for AQZ10∗D
equipped type
Output terminals
Load or
DC only for AQZ10∗D
equipped type
