Yokogawa JUXTA M Series Digital Limit Alarms MVTK User Manual

Page 8

IM 77J04T31-01E 2nd Edition Feb. 09, 2007-00

14. MAIN SPECIFICATIONS

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Model and Suffix Codes

- 0 0 - /

Digital Limit Alarm (Thermocouple Input Type)
General use type
Always 0
24 V DC

10%

100-240 V AC/DC (Operating range: 85 to 264 V AC/DC)
Thermocouple input
Custom order
Alarm output (transfer contact [1a1b] ), 2 points
Alarm output (NO contact), 4 points
1 to 5 V DC
4 to 20 mA DC
Communication function (RS-485)
No monitor output
UP
DOWN
OFF (No burnout)
Without socket

Model

MVTK

Suffix Codes

Type

Power Supply

Input Signal

Output Signal

Monitor Output

Burnout

Optional Specification

3
6

1
2

A
P
N

U
D
N

-U

-Z

/SN

-0

Description

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Input and Display

Number of inputs: 1 point
Input signal: Set the measured input range within the instrument input range. (Refer to Section 7.1.)
Input resistance: 1 M

Ω

(4 k

Ω

during power off)

Allowable leadwire resistance: 500

Ω

or less

However, when used with BARD, this value can be added to the BARD internal resistance.

Maximum allowable input:

4 V DC

PV (measured value) display: 4-digit, 7-segment, red/green LED, character height of 13.5 mm
Data display: 4-digit, 7-segment, green LED, character height of 9 mm
Alarm indicator lamp: 2 orange LEDs for 2 points of alarms or 4 orange LEDs for 4 points of alarms.

Lights up if an alarm occurs.

Economical mode: Turns off the indicating LED if no keystroke is made within the set time.

Setting range: 0 (does not go off) or 1 to 60 minutes

Active color PV display (PV display color changing function): This function changes the PV display

color from green to red or from red to green according to the set PV display color
mode shown below.

[PV display color mode to be set]

Link to alarm 1: Links to alarm 1.
Link to alarm 1 and alarm 2: Links to alarm 1 and alarm 2.
Link to alarm 1 to alarm 4 (only for 4 points of alarms): Links to alarm 1 to alarm 4.
SP deviation: Changes the PV display color according to whether measured value is less than

SP deviation high limit or SP deviation high limit or more; whether measured value is
more than SP deviation low limit or SP deviation low limit or less.

PV limit: Changes the PV display color according to whether measured value is less than

measured range high limit or measured range high limit or more; whether measured
value is more than measured range low limit or measured range low limit or less.

Fixed color: Fixes PV display color in green or red.

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Output

Signal type: Relay contact
Number of outputs: 2 points of contact outputs (transfer contact [1a1b] ) or 4 points of contact

outputs (NO contact)

Contact rating: 120 V AC/1 A, 220 V AC/0.5 A (resistance load)

30 V DC/1 A, 120 V DC/0.1 A (resistance load)

Alarm action:

PV high-limit alarm

PV low-limit alarm

Deviation high-limit alarm

Deviation low-limit alarm

Deviation high and low-limit alarm

Deviation within high and low-limit alarm

Energized or de-energized under normal condition

De-energized under normal condition

Alarm action

Relay action

Alarm setting range: Within the input range

Setting resolution: 1 digit

(Note)

Setpoint setting: Virtual setpoint when the deviation alarm occurs

Setting range: Within the input range
Setting resolution: 1 digit

(Note)

Hysteresis setting range: The value resulting from adding a hysteresis value to an alarm setpoint

should be within the set input range.

Setting resolution: 1 digit

(Note)

Note: The content of 1 digit is variable according to the set range code No.

Alarm ON delay setting: Condition monitoring time from the establishment of alarm conditions to its

output

Setting range: 0 to 999 seconds
Setting resolution: 1 second (However, about 0.2 second is to be added to the set time to prevent

wrong operation.)

Alarm OFF delay setting: Condition monitoring time from the establishment of return-to-normal

conditions to its output

Setting range: 0 to 999 seconds
Setting resolution: 1 second (However, about 0.2 second is to be added to the set time to prevent

wrong operation.)

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Monitor Output

●

Analog Output

Output signal: 1 to 5 V DC or 4 to 20 mA DC
Allowable load resistance: 2 k

Ω

or more for 1 to 5 V DC

350

Ω

or less for 4 to 20 mA DC

Output variable range: -6 to +106%
Output scaling: Set any value within the measured input range. (Set the value so that the input

range corresponding to the output scaling converted into thermoelectromotive force is
3 mV or more.)

Output accuracy:

0.1% of output span

However, the accuracy is limited in the following cases according to the output scaling

setting.

When the input range corresponding to the output scaling converted into thermoelectromotive force

is less than 27.5 mV

in the instrument input range M:

Accuracy=

0.1 (%)

27.5 (mV)

Input range converted into thermoelectromotive force (mV)

(%)

When the input range corresponding to the output scaling converted into thermoelectromotive

force is less than 10 mV

in the instrument input range L :

Accuracy=

0.1 (%)

10 (mV)

Input range converted into thermoelectromotive force (mV)

(%)

●

Communication Output (RS-485)

The MVTK can be connected to a personal computer, graphic panel, Yokogawa’s programmable
controller FA-M3 or programmable controllers of other manufacturers.

Standards: EIA RS-485
Maximum number of connectable units: 31 units
Maximum communication distance: 1200 m
Communication method: 2-wire half duplex, start-stop synchronization, non-procedural
Baud rate: 1200, 2400, 4800 or 9600 bps
Data length: 8 or 7 bits
Stop bit: 1 or 2 bits
Parity: Even, odd or none
Communication protocol: PC link, PC link with SUM, MODBUS ASCII, MODBUS RTU or Ladder

PC link communication: Communication protocol with a personal computer, graphic panel or UT

link module of FA-M3

MODBUS communication: Communication protocol with a personal computer

(SCADA).

Ladder communication: Communication protocol with ladder communication module of FA-M3

and programmable controller of other manufacturers.

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Standard Performance

Input display accuracy:

0.1%

1 digit of instrument input range span

Alarm action point setting accuracy:

0.1%

1 digit of instrument input range span

Reference junction compensation accuracy:

C (other than Type R and S),

C (Type R and S)

at 25

Response speed: 500 ms (Time to alarm output when the input change is 10 to 90% and alarm

setpoint is 50%. When the alarm delay setting and hysteresis are minimum.)

Burnout: UP, DOWN or OFF

Burnout time: 60 seconds or less
Action: High-limit alarm output for UP, Low-limit alarm output for DOWN

Insulation resistance: 100 M

Ω

/500 V DC between inputs, alarm outputs, power supply and monitor

output mutually.

Withstand voltage: 2000 V AC/minute between inputs, (alarm outputs 1, 2, 3 and 4), monitor

output and power supply mutually.

However, the following is excluded.

1000 V AC/minute between (alarm outputs 1 and 4) and (alarm outputs 2 and 3) and

between inputs and monitor output.
(For 2 points of alarms, alarm outputs 3 and 4 are excluded.)

Power supply voltage: 24 V DC

10%, 100-240 V AC/DC (-15%, +10%) 50/60Hz

Power consumption: 24 V DC 2.7 W, 110 V DC 2.5 W, 100 V AC 4.2 VA,

200 V AC 5.4 VA

Effect of power supply fluctuation:

0.1% of span or less for the fluctuations within the allowable

range of each power supply specification

Effect of ambient temperature change:

0.2% of span or less for a temperature change of 10

Effect of leadwire resistance change:

␮

V or less for a change of 100

Ω

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Mounting, Appearance and Environmental Conditions

Construction: Plug-in type
Material:

Casing; ABS resin (black), UL94 V-0
Socket; Modified polyphenylene oxide resin, including glass fiber (black),
UL94-V1

Mounting method: Wall or DIN rail mounting
Connection method: M3.5 screw terminal for input/output and power supply

3-pin 2-piece connector for monitor output

External dimensions: 51 (W)

86.5 (H)

133 (D) mm (including a socket)

Weight:

Main unit; approx. 270 g
Socket; approx. 80 g

Operating temperature range: 0 to 50

Operating humidity range: 5 to 90% RH (no condensation)
Operating conditions: Avoid installation in such environments as corrosive gas like sulfide hydrogen,

dust, sea breeze and direct sunlight.

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External Dimensions

103

133

7.8

86.5

(20)

(35.4)

(3.3)

*1 To be added when the monitor output is specified.

Monitor output

terminal *1

2-Ø4.5

Mounting hole
(depth: 24.5)

Main unit

Socket

51 max.

RJC sensor

11-M3.5

screw

DIN rail

Unit: mm