Yokogawa UM331 Data sheet

<<Contents>> <<Index>>

General Specifications

Model UM331 Digital Indicator with Alarms with Active Color PV Display

GS 05F01D12-02E

■ General

Model UM331 Digital Indicator with Alarms is a precision 1/8 DIN alarm instrument provided with universal input. For excellent monitoring operability, it has a large PV display with the PV display color changing function “Active Color PV Display.” It is provided with four alarm setting points or setting outputs (one is optional function). A retransmission output and 15 V DC loop power supply are also provided as standard. A communication function and 24 V DC loop power supply are available optionally.

■ Main Features

• Extra-large digital display allows the indicated values to be read even from a long distance. LEDs of 20 mm height are used for the PV display.

• The PV display color changing function "Active Color PV Display" is provided. PV display color is changed from green to red and vice versa when an alarm occurs. The color also can be fixed in green or red.

• Universal input allows simple setting of the input type (thermocouple, RTD or mV) and PV input range from the front panel.

• Various communication functions are provided. Communication is possible with personal computer, programmable logic controller, and other instruments.

■ Function Block Diagram

PV input Contact

Input processing

Bias computation

First-order lag computation

24 V DC loop

power supply

Power supply

Resets the PV peak and

PV indication

bottom values.

Retransmission output or 15 V DC loop power supply

Current

*Alarm output 4 is an optional function.

Alarm output

Alarm 1, 2, 3, 4*

UM331

Indication

in green or

red color

UM331E

“E” indicates the model with expanded functions.

■ Functional Specifications

● Signal Computation Functions

PV input computation:

Bias addition (–100.0 to 100.0% of PV input range span), first-order lag filter (time constant off, 1 to 120 s)

Contact input: Retains and displays peak and bottom

values of PV input values. Resets the peak and bottom values.

● Alarm Functions

Six types of alarm functions are provided. The alarm status is indicated by the alarm lamp on the front panel. Also, four points among them (one is optional function) can be output as relay contact outputs.

Alarm types:

PV high limit, PV low limit, De-energized on PV high limit, De-energized on PV low limit, Fault diagnosis, and FAIL output

Alarm setting ranges:

PV alarms: –100.0 to 100.0% of PV input range Alarm hysteresis: 0.0 to 100.0% of PV input

Delay timer:

Stand-by action:

Fault diagnosis alarm:

FAIL output: Abnormality in software or hardware.

range span

0.00 to 99.59 (minute, second) An alarm is output when the delay timer expires after the alarm setpoint is reached. Setting for each alarm is possible.

Stand-by action can be set to make PV alarm OFF during start-up.

Input burnout, A/D conversion error or thermocouple RJC error

● Display and Operation Functions

PV display: 4-digit digital display for engineering data Parameter display:

4-digit digital display for various data, including parameters

GS 05F01D12-02E

©Copyright Apr. 2003 (MC)

4th Edition Apr. 2007 (KP)

<<Contents>> <<Index>>

Status indication: Alarm indicator lamp

Four lamps; AL1, AL2, AL3 and AL4

PV display color changing function “Active Color PV

Display” : (Factory-set default : Fixed in red mode) This function automatically changes PV display color by the action described below. Green-to-red or red-to-green changing action is selectable.

Link to alarm 1 mode :

Alarm OFF : green, Alarm ON : red Setting of Alarm OFF : red, Alarm ON : green is possible.

Link to alarms 1 and 2 mode:

Alarm OFF : green, Alarm ON : red Setting of Alarm OFF : red, Alarm ON : green is possible.

PV limit mode :

Within the preset PV range : green, Out of the preset PV range : red Setting of Within the preset PV range : red, Out of the preset PV range : green is possible. The range (high limit and low limit) is changeable using a parameter.

Fixed color mode :

PV display color is fixed in green or red.

Operation keys:

 and  keys: Increase or decrease setpoints or

various parameters.

SET/ENT key: Sets set data, calls or switches various

parameters.

SELECT display:

Allows selection and registration of frequently changed parameters from the operating parameters during operation.

For example, if the alarm setpoint 1 is registered in the SELECT display, the setpoint can easily be displayed during operation.

Security function:

Operation can be key-locked by setting a parameter. Opeation can be inhibited by a password.

● Communication Functions (Optional Function)

The communication function, provided with the instrument, allows connection to a personal computer, and programmable logic controller.

Communication protocol

Computer link communication:

Communication protocol with a personal computer

Ladder communication:

Communication protocol with programmable logic controller.

MODBUS Communication:

Communication protocol with a personal computer or PLC.

Communication interface

Communication protocol:

Computer link, ladder communication or

MODBUS communication Standards: EIA RS-485 Maximum number of connectable controllers:

31 GREEN series controllers Maximum communication distance: 1,200 m Communication method:

Two-wire half duplex, or four-wire half

duplex, start-stop synchronization system,

non-procedural Communication rate:

600, 1200, 2400, 4800, or 9600 bps

LED display unit (for PV)

Displays PV and error code when errors are detected. Active color PV display Indication in green or red color.

Status lamps

Indicate alarm status (AL1, 2, 3, 4).

Operation keys

LED display unit

Displays setting items/values of parameters.

Increase/decrease the setting data (, ). Select parameter, enter the setting data (SET/ENT).

Sample Structures of Communication Systems Configuration Diagram

(1) Computer link communication/MODBUS communication (2) Ladder communication

Personal computer

UM351/UM331 Digital indicator with Alarms

PLC

GS 05F01D12-02E 4th Edition Apr. 02, 2007-00

<<Contents>> <<Index>>

■ Hardware Specifications

PV Input Signal

Number of input points: 1 Input system: The input type and instrument range can be

specified using the input range code shown in the table below with key operation or via

communication. Sampling period: 250 ms Input type, instrument range and measurement accuracy:

Refer to the table below. Burnout detection:

Functions at thermocouple (TC), RTD or

standard signal of 0.4 to 2 V or 1 to 5 V.

Upscale, downscale, and off can be specified.

For standard signal, set to burnout at 0.1 V or

less. Input bias current: 0.05 µA for TC or RTD b-terminal Measurement current (RTD): About 0.13 mA

Allowable signal source resistance:

250 Ω or less for TC or mV input Effects of signal source resistance:

2 kΩ or less for DC voltage input Effects of signal source resistance:

Allowable wiring resistance:

Maximum 150 Ω/wire (resistance in each of three wires must be equal) for RTD input However, maximum 10 Ω/wire for the range of –150.0 to 150.0°C Wiring resistance effect: ±0.1°C/10 Ω

Allowable input voltage:

±10 V DC for TC, mV or RTD input ±20 V DC for DC voltage input

Noise rejection ratio:

Normal mode 40 dB (50/60Hz) or more Common mode 120 dB (50/60Hz) or more

Input resistance: 1 MΩ or more for TC or mV input

About 1 MΩ for DC voltage input

Input type Instrument range (˚C)

Unspecified(when shipped from the factry)

Thermocouple

RTD

Standard signal DC voltage

*1: Performance in the standard operating conditon (at 23°C ±2°C, 55±10%RH, and 50/60Hz power frequency) Note 1: The accuracy is ±0.3°C of instrument range ±1 digit for a temperature range from 0 to 100°C. Note 2: The accuracy is ±0.5°C of instrument range ± 1 digit for a temperature range from -100 to 0°C and 100 to 200°C.

J T

S R N

E L (DIN) U (DIN)

W (DIN) Platinel 2 PR20-40

W97Re3-W75Re25 JPt100

Pt100

0.4 to 2 V 1 to 5 V 0 to 2 V 0 to 10 V

-10 to 20 mV 0 to 100 mV

Input range

code

OFF Set the data item PV input Type"IN" to the OFF option to leave the PV input type undefined.

1 2 3 4 5 6 7

8 9

11 12 13 14 15 16 17

18 30

31 35 36 37 40 41 50 51 55 56

-200 to 1370˚C

-199.9 to 999.9˚C

-199.9 to 500.0˚C

-199.9 to 999.9˚C

-199.9 to 400.0˚C

0.0 to 400.0˚C 0 to 1800˚C

0 to 1700˚C 0 to 1700˚C

-200 to 1300˚C

-199.9 to 999.9˚C

-199.9 to 900.0˚C

-199.9 to 400.0˚C

0.0 to 400.0˚C 0 to 2300˚C 0 to 1390˚C 0 to 1900˚C

0 to 2000˚C

-199.9 to 500.0˚C

-150.0 to 150.0˚C

-199.9 to 850.0˚C

-199.9 to 500.0˚C

-150.0 to 150.0˚C

0.400 to 2.000

1.000 to 5.000

0.000 to 2.000

0.00 to10.00

-10.00 to 20.00

0.0 to 100.0

Instrument range (˚F)

-300 to 2500˚F 0 to 2300˚F

-199.9 to 999.9˚F

-300 to 2300˚F

-300 to 750˚F

-199.9 to 750.0˚F 32 to 3300˚F

32 to 3100˚F 32 to 3100˚F

-300 to 2400˚F

-300 to 1800˚F

-300 to 1300˚F

-300 to 750˚F

-199.9 to 750.0˚F 32 to 4200˚F 32 to 2500˚F 32 to 3400˚F

32 to 3600˚F

-199.9 to 999.9˚F

-199.9 to 300.0˚F

-300 to 1560˚F

-199.9 to 999.9˚F

-199.9 to 300.0˚F

Scaling is enable in the following 4 range.

-1999 to 9999

-199.9 to 999.9

-19.99 to 99.99

-1.999 to 9.999

±0.1% of instrument range ±1 digit for temperatures equal to or higher than 0 ˚C, ±0.2% of instrument range ±1 digit for temperatures below 0 ˚C

±0.15% of instrument range ±1 digit for temperatures equal to or higher than 400 ˚C ±5% of instrument range ±1 digit for temperatures below 400 ˚C

±0.15% of instrument range ±1 digit

±0.1% of instrument range ±1 digit ±0.25% of instrument range ±1 digit for

temperature below 0 ˚C ±0.1% of instrument range ±1 digit for temperatures equal to or higher than 0˚C ±0.2% of instrument range ±1 digit for temperatures below 0˚C

±0.2% of instrument range ±1 digit ±0.1% of instrument range ±1 digit ±0.5% of instrument range ±1 digit for

temperatures equal to or higher than 800˚C No guarantee of accuracy for temperatures below 800˚C

±0.2% of instrument range ±1 digit ±0.1% of instrument range ±1 digit (Note 1)

(Note 2)

±0.2% of instrument range ±1 digit (Note 1) ±0.1% of instrument range ±1 digit (Note 1)

(Note 2)

±0.2% of instrument range ±1 digit (Note 1) ±0.1% of instrument range ±1 digit

The read-out range can be scaled between 1999 and 9999.

0.1 µV/Ω or less

About 0.01%/100Ω

Measurement accuracy

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