YOKOGAWA UM33A User Manual

Installation and Wiring
16
16-9
IM 05P03D21-01EN
16.4.4 Contact Output Wiring
CAUTION
1) Use an auxiliary relay for load-switching if the contact rating is exceeded.
2) Connect a bleeder resistor when a small current is used, so that a current
exceeding 1 mA can be supplied.
3) The output relay has a limited service life. Be sure to connect a CR filter (for AC)
or diode (for DC) to the load.
4) The use of inductance (L) loads such as auxiliary relays, motors and solenoid
valves causes malfunction or relay failure; always insert a CR filter for use with
alternating current or a diode for use with direct current, as a spark-removal
surge suppression circuit, into the line in parallel with the load.
5) If there is a risk of external lightning surges, use a lightning arrester etc.
6) The alarm output should always be used with a load of 1 mA or more.
7) Since the insulation provided to each relay output terminal is Functional
insulation, provide Reinforced insulation to the external of the device as
necessary. (Refer to the drawing below.)
This product
Functional
insulation
A safety
voltage circuit
A safety
voltage circuit
This product
Reinforced insulation
Reinforced insulation
Functional
insulation
A hazardous
voltage circuit
A hazardous
voltage circuit
A safety
voltage circuit
A safety
voltage circuit
This product
Reinforced insulation
Reinforced insulation
Functional
insulation
A hazardous
voltage circuit
A hazardous
voltage circuit
A hazardous
voltage circuit
A hazardous
voltage circuit
DCRelayWiring
R
External DC power supply
Relay
O.C
UM’s contact
Diode
(Mount it directly
to the relay coil
terminal (socket).)
Relay
(Use one with a relay coil rating
less than the UM’s contact rating.)
ACRelayWiring
R
CR filter
(Mount it directly
to the relay coil
terminal (socket).)
Relay
(Use one with a relay coil
rating less than the UM’s
contact rating.)
UM’s contact
External AC power supply
16.4 Wiring

YOKOGAWA UM33A Specifications

General

Brand	YOKOGAWA
Model	UM33A
Category	Touch Panel
Language	English