Yokogawa JUXTA M Series Digital Limit Alarms MVHK User Manual

Page 8

IM 77J04H31-01E 3rd Edition : 2006.08.31-00

14. MAIN SPECIFICATIONS

■

Model and Suffix Codes

0 - 0 /

Type

Power Supply

Input Signal

Output Signal

Monitor Output

Optional Specification

-0
-1

3
6

-6
-A
-U
-Z

1
2

6
A
P
N

/R100
/R250
/SN

Digital Limit Alarm (DC Input Type)
General use type
JK12 type (The terminal assignment is same as that of Yokogawa’s JK12 and MHKW.)
Always 0
24 V DC

10%

100-240 V AC/DC (Operating range: 85 to 264 V AC/DC)
1 to 5 V DC
4 to 20 mA DC (with 250

Ω

receiving resistor)

DC voltage or DC current signal
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
Always 0
With 100

Ω

receiving resistor

With 250

Ω

receiving resistor

Without socket

Model

MVHK

Suffix Codes

Description

■

Input and Display

Number of inputs: 1 point
Input signal: Set the measured input range within the instrument input range. (Refer to

Section 7.2.)

Input resistance:

For voltage input: 1 M

Ω

(100 k

Ω

during power off)

For current input: 100

Ω

or 250

Ω

(with external receiving resistor)

(Specify at the time of order.)

Input scaling (displayed value): -1999 to 9999 (Decimal point position can be set.)
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.

■

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 set input scaling value

Setting resolution: 1 digit

(Note)

Setpoint setting: Virtual setpoint when the deviation alarm occurs

Setting range: Within the set input scaling value
Setting resolution: 1 digit

(Note)

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

setpoint should be within the range of set input scaling value.

Setting resolution: 1 digit

(Note)

Note: The content of 1 digit is variable according to the input scaling value.

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.)

■

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 set input scaling value (displayed value).
Output accuracy:

0.1% of output span (However, the accuracy is limited in the

following cases according to the scaling setting.)

When the input range corresponding to the output scaling is less than 5 V in the

instrument input range H:

Accuracy =

0.1 (%)

5 (V)

Corresponding input range (V)

(%)

When the input range corresponding to the output scaling is less than 2.5 V in the

instrument input range M:

Accuracy =

0.1 (%)

2.5 (V)

Corresponding input range (V)

(%)

When the input range corresponding to the output scaling is less than 0.5 V in the

instrument input range L:

Accuracy =

0.1 (%)

0.5 (V)

Corresponding input range (V)

(%)

For current input, apply the value [input range

input resistance] to the above, and

add the resistor error 0.1%.

●

Communication Output (RS-485)

The MVHK 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.

■

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

For current input, add the resistor error 0.1%.

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.)

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 3.0 W, 110 V DC 2.4 W, 100 V AC 3.9 VA,

200 V AC 5.3 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

■

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.

■

External Dimensions

103

133

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

Monitor output
terminal *1

3.3

7.8

2-Ø4.5

Mounting hole
(depth: 24.5)

DIN rail

35.4

86.5

(25)

Main unit

Socket

51 max.

11-M3.5

screw

Receiving resistor

Unit: mm