Specifications
Mechanical Indicators
88
Precautions When Handling Meter Relays
For meter relays, always keep the auxiliary power supply on. The consequences of turning the auxiliary power supply on/off are
described below.
Power
interruption
(power off)
Power
restoration
(power on)
Auxiliary
power supply
ON
OFF
Mode A
(Note) *Method for restoring normal operation after restoration from power interruption.
Turn the setting knob to move the needle setting in the order of q, w as shown below. After this, reset the needle setting.
Mode B
q
w
q
w
q
w
q
w
Model name
LM-11MRN
LM-11MRHN
LR-11MRN
LR-11MRHN
YM-210MRN
YM-210MRHN
YR-210MRN
YR-210MRHN
Relay output (dur
ing mode A)
The relay state immediately bef
ore
power interruption is held.
Normal operation is performed
immediately.
The relay state immediately before
power interruption is output.*
Normal operation is performed
immediately.
Normal operation is performed
immediately.
Both the upper-limit and lower-limit
relays are turned off.
Relay output (during mode B)
Indicator input = Setting region
immediately before power interruption
Indicator input≠Setting region
immediately before power interruption
Relay output Lower limit Upper limit
Malfunction details
Action
Relay output is ON (when it should be OFF) Relay output is OFF (when it should be ON) Relay output is ON (when it should be OFF) Relay output is OFF (when it should be ON)
Lower limit Lower limit Lower limit Lower
limit
Upper limit Upper limit Upper limit Upper
limit
Needle Needle Needle Needle
If an inrush current that is generated when a motor is started exceeds the setting value even instantaneously, the relay operates
during that state.
To prevent unnecessary influence of the relay during such a transition state of the input signal, use a timer to release the
output relay terminals for a fixed time during starting to prevent unnecessary operation of a control device.
T
MC
Meter relay
L1
LOWc
L2
HIGHc
aabb
TT
MC : auxiliary contact of electromagnetic switch for
starting motor
T : timer
L1, L2 : control device