-|Transparent Guide|-
Communication Interface
■ RS485
Comm. protocol
Modbus RTU
Application standard
Compliance with EIA RS485
Max. connection
31 units (address: 01 to 99)
Comm. synchronous method
Asynchronous
Comm. method
2-wire half duplex
Comm. distance
≤ 800 m
Comm. speed
1,200 / 1,400 / 4,800 / 9,600 / 19,200 / 38,400 bps
Start bit
1-bit (fixed)
Data bit
8-bit (fixed)
Parity bit
None, Even, Odd
Stop bit
1-bit, 2-bit
EEPROM life cycle
≈ 1,000,000 operations (Erase / Write)
Specifications
Model
MT4Y-DV-
4□
MT4Y-DA-
4□
MT4Y-AV-
4□
MT4Y-AA-
4□
Input type
DC voltage
DC current
AC voltage
01)
AC current
01)
Max.
allowable
input
110 % F.S. for each measured input range
Display method
7-segment (red) LED (
c
haracter height: 14.2 mm)
Display accuracy
Dependent on the ambient temperature
23 ± 5 ℃
± 0.1 % F.S. rdg
± 2 digit
± 0.1 % F.S. rdg
± 2 digit
02)
± 0.3 % F.S. rdg
± 3 digit
± 0.3 % F.S. rdg
± 3 digit
-10 to 50 ℃
± 0.5 % F.S. rdg ± 3 digit
Max. display range
-1999 to 9999 (4 digit)
A / D
conversion
method
ΣΔ (Sigma Delta) ADC
Sampling cycle
50 ms
16.6 ms
Unit weight
(packaged)
≈ 134 g (≈ 213.5 g)
Approval
ᜢ ᜧ ᜫ
01) Available frequency display, Display accuracy (23 ± 5 ℃): ± 0.1 % F.S. rdg ± 2 digit
02) 5 A terminal: ± 0.3 % F.S. rdg ± 3 digit
P
reset output
None (indicator) / Relay / NPN open collector / PNP open collector
output model
Relay
Contact capacity: 250 VACᜠ 3 A, 30 VDCᜡ 3 A
Contact composition: N.O (1a)
NPN / PNP
open collector
Output capacity: ≤ 12 - 24 VDCᜡ ± 2 VDCᜡ, 50 mA resistive load
Sub
output
None (indicator) / BCD Dynamic / Transmission (DC 4 - 20 mA) /
Low speed serial / RS485 Communication output model
BCD Dynamic /
Low speed
serial
NPN open collector output
Output capacity: ≤ 12 - 24 VDCᜡ, 50 mA resistive load
Transmission
(DC 4 - 20 mA)
Resolution: 1/12,000 (load resistance: ≤ 600 Ω)
Response time: ≤ 450 ms
RS485 communication Protocol: Modbus RTU
Power supply
100 - 240 VACᜠ ± 10 % 50 / 60 Hz
Power consumption
5 VA
Insulation resistance
B
etween external terminal and case: ≥ 100 MΩ (500 VDCᜡ megger)
Dielectric strength
B
etween external terminal and case: 2,000 VACᜠ 50 / 60 Hz for 1 min
Noise immunity
± 2 kV square wave noise (pulse width: 1 ㎲) by the noise simulator
Vibration
0.75 mm double amplitude at frequency of 10 to 55 Hz (for 1 min) in
each X, Y, Z direction for 2 hours
Vibration
(malfunction)
0.5 mm double amplitude at frequency of 10 to 55 Hz (for 1 min) in
each X, Y, Z direction for 10 min
Shock
300 m/s
2
(≈ 30 G) in each X, Y, Z direction for 3 times
Shock (malfunction)
100 m/s
2
(≈ 10 G) in each X, Y, Z direction for 3 times
Relay life cycle
Mechanical
: ≥ 20,000,000 operations
Electrical: ≥ 100,000 operations (250 VACᜠ 3A resistive load)
Ambient temp.
-10 to 50 ℃, storage: -20 to 60 ℃ (no freezing or condensation)
Ambient humi.
35 to 85 %RH, storage: 35 to 85 %RH (no freezing or condensation)
Insulation type
Symbol: , double or reinforced insulation (dielectric strength between
the measurement input part and the power part: 1 kV)
Parameter Setting
• Some parameters are activated / deactivated depending on the model or setting of
other parameters. Refer to the description of each parameter.
• If any key is not entered for 60 sec in each parameter, it returns to RUN mode.
• After returning to RUN mode, press the [MODE] key within 2 sec, it returns to
previous parameter.
• [MODE] key: Saves current setting value and moves to the next parameter.
[◀] key: Checks fixed value / Changes setting digits.
[▲], [▼] key: Changes setting values.
■ Parameter 1 group
Parameter
Mark
Defaults
Setting range
Display
condition
1-1 Input range
IN-R
500V
[DC voltage model], [AC voltage model]
•
Refer to Input Range and Display Range
-
5A
[DC current model], [AC current model]
•
Refer to Input Range and Display Range
-
1-2
Display
method
DISP
STND
STND: standard, SCAL:
scale
, FREQ:
frequency
01)
-
1-3
Measurement
method
IN-T
tRMS
[AC voltage model], [AC current model]
T.RMS: True RMS, A.RMS: Average RMS,
AVG
• True RMS =
A
1
2
+ A
2
2
+ ··· + A
n
2
n
•
A
verage RMS =
A
1
+ A
2
+ ··· + A
n
n
× Waveform rate
(n = number of display values per cycle,
A = display value)
1-2
Display
method:
STND,
SCAL
1-4
Max. display
value
(fixed)
STND
50)0
[DC voltage model], [AC voltage model]
Max. value of display range
1-2
Display
method:
STND
%000
[DC current model], [AC current model]
Max. value of display range
1-5
High-limit
display value
gradient
correction
INbH
!000
0.100 to 5.000 %
1-6
Low-limit
display value
deviation
correction
INbL
00
-99 to 99
1-7
Decimal
point
position
DOT
)0
[DC voltage model], [AC voltage model]
0, 0.0, 0.00, 0.000
1-2
Display
method:
SCAL
&
* 1-7
Decimal
point
position:
0.0, 0.00,
0.000
)000
[DC current model], [AC current model]
0, 0.0, 0.00, 0.000
1-8 High-limit scale
H-SC
-
Display value against max. measurement input*
1-9 Low-limit scale
L-SC
-
Display value against min. measurement input*
1-10
High-limit
display value
gradient
correction
INbH
!000
0.100 to 5.000 %
1-11
Low-limit
display value
deviation
correction
02)
INbL
00
w-99 to 99
1-12
Decimal
point
position
03)
DOT
)0
[AC voltage model]
0, 0.0, 0.00, 0.000
1-2
Display
method:
FREQ
)000
[AC current model]
0, 0.0, 0.00, 0.000
1-13
High-limit
display value
gradient
correction
INbH
!000
0.100 to 9.999
1-14
Exponent of
INB
INbE
10-0
10-0: 10
0
, 10-1: 10
-1
, 10-2: 10
-2
, 10 1: 10
1
01) Displays at AC voltage or AC current model only.
02)
Low-limit display value deviation correction range is within -99 to 99 for D
0
, D
-1
digit regardless of decimal point position.
03) Display range is variable according to decimal point position.
Dot
Display range
Frequency
measurement range
0
-1999 to 9999
1 to 9999 Hz
)0
-199.9 to 999.9
0.1 to 999.9 Hz
)00
-19.99 to 99.99
0.10 to 99.99 Hz
)000
-1.999 to 9.999
0.100 to 9.999 Hz
Mode Setting
RUN
[MODE] 3
sec
→
Parameter 1
group
[MODE] 3 sec
→
RUN
[MODE] 5
sec
→
Parameter 2
group
[MODE] 3 sec
→
[MODE]
→
Parameter 0
group
[MODE] 3 sec
→
[◀] + [▲] 3 sec
→
Zero adjustment
Auto
→
[◀] + [▲] + [▼] 5 sec
→
Reset
[MODE]
→
