UNI-T UT321 User Manual download pdf (Page 1)

IM 05D01D12-01E (1)

This manual describes installation, wiring, and other tasks required to make the controller ready for operation.

Contents

1. Safety Precautions

2. Model and Suffix Codes

3. How to Install

4. How to Connect Wires

5. Hardware Specifications

6. Terminal Wiring Diagrams

Introduction

Thank you for purchasing the UT351/UT321 digital indicating controllers.

The controller is shipped from the factory with 4 hardcopy user’s manuals (A2 and A3 size) and 1 user’s manual on CD-

ROM. The 4 user’s manuals in hardcopy format describe the operating procedures required for basic use. It is recommended

that you refer to these user’s manuals to understand [1] installation, [2] initial settings, and [3] operating procedures of the

controller.

The CD-ROM contains an User’s Manual (Reference) with descriptions of various functions and setting ranges that can be

set as necessary.

Moreover, the use of an optional parameter setting tool (model: LL100-E10) allows you to easily perform settings and

adjustments with a PC.

■ How to Use the Manuals

Purpose Manual Title Description Media

Setup

Installation

Describes the tasks (installation, wiring, and others) required

to make the controller ready for operations.

A2-size paper,

back and front

Basic operation

Initial Settings

Describes examples of setting PV input types, control output

types, and alarm types. Making settings described herein

allows you to carry out basic control.

A2-size paper,

front

Operating

procedures

and troubleshooting

Operations

Describes key operation sequences. For operation control

through external contact inputs, see the back of

User’s Manual.

A2-size paper,

back

Brief operation

and setpoint recording

Parameters

Contains the parameter map used as a guideline for setting

parameters and lists of parameters for recording User Settings.

A2-size paper,

back and front

Basic operation of

Active Color PV Display

Setting / explanation

of Active Color PV Display

Describes the setting/explanation of Active Color PV Display.

A3-size paper,

back and front

Detailed description

of functions

User’s Manual

(Reference)

Describes functions more advanced than those explained in

the 3 hardcopy user’s manuals.

CD-ROM

1. Safety Precautions

The following symbol is indicated on the controller to ensure safe use.

CAUTION

This symbol on the controller indicates that the operator must refer to an explanation in the user’s manual in order

to avoid the risk of injury or death of personnel or damage to the instrument. The manual describes how the operator

should exercise special care to avoid electric shock or other dangers that may result in injury or loss of life.

The following symbols are used in the hardcopy user’s manuals and in the user’s manual supplied on the CD-ROM.

NOTE

Indicates that operating the hardware or software in a particular manner may damage it or result in a system failure.

IMPORTANT

Draws attention to information that is essential for understanding the operation and/or features of the controller.

2. Model and Suffix Codes

Before using the controller, check that the model and suffix codes match your order.

UT351

UT321

0 None

1 With communication, heater burnout alarm

Optional functions

2 With heater burnout alarm

-0 Standard type

-2 Heating/cooling type

-3 Standard type (with 24 V DC loop power supply)

Digital indicating controller (provided with retransmission output and 15 V

DC loop power supply as standard)

Model Suffix Code Description

Type

Check that the following items are provided:

• Digital indicating controller (of ordered model): ...........................................1

• Brackets (mounting hardware): ......................................................................1 pair

• Unit label: .......................................................................................................1

• User’s Manuals: ..............................................................................................3 (A2 size)

• User’s Manuals “Setting/Explanation of Active Color PV Display”: ............1 (A3 size)

• User’s Manual (Reference) (CD-ROM version): ...........................................1

3. How to Install

NOTE

To install the controller, select a location where:

(1) no one may accidentally touch the terminals,

(2) mechanical vibrations are minimal,

(3) corrosive gas is minimal,

(4) temperature can be maintained at about 23°C and the fluctuation is minimal,

(5) no direct radiant heat is present,

(6) no magnetic disturbances are caused,

(7) no wind blows against the terminal board (reference junction compensation

element),

(8) no water is splashed,

(9) no flammable materials are around,

Never place the controller directly on flammable items or equipment.

If the controller has to be installed close to flammable items or equipment, be sure to provide shielding panels all

around the controller, at least 150mm away from every side; the panels should be made of either 1.43mm-thick

metal-plated steel plates or 1.6mm-thick uncoated steel plates.

NOTE

Never touch the opening at the bottom of the case. It is to be used in the factory at shipping.

● Installation Position

Install the controller at an angle within 30° from horizontal

with the front panel facing upward. Do not install it facing

downward. The position of right and left sides should be hori-

zontal.

■ External Dimensions and Panel Cutout Dimensions

(25)

(53)

[(N-1)96+92]117 min.

145 min.

+0.8

"N" stands for the number of controllers to be

installed.

However, the measured value applies if N  5.

100

UT351

Small bracket

Large bracket

91.8

112

Unit: mm

1 to 10 mm (Panel thickness)

General installation Side-by-side close installation

[(N-1)48+45]

+0.6

+0.8

"N" stands for the number of controllers to be

installed.

However, the measured value applies if N  5.

10048 11

UT321

Small bracket

91.8

112

Unit: mm

+0.6

(25)

(53)

145 min.

+0.8

70 min.

1 to 10 mm (Panel thickness)

General installation Side-by-side close installation

■ How to Install

CAUTION

Turn off the power to the controller before installing it on the panel because there is a possibility of electric shock.

After opening the mounting hole on the

panel, follow the procedures below to in-

stall the controller:

1. Insert the controller into the opening

from the front of the panel so that the

terminal board on the rear is at the far

side.

2. Set the brackets in place on the top and

bottom of the controller as shown in the

figure on the left, then tighten the screws

of the brackets. Take care not to over-

tighten them.

4. How to Connect Wires

CAUTION

1) Before carrying out wiring, turn off the power to the controller and check that the cables to be connected are not

alive with a tester or the like because there is a possibility of electric shock.

2) Wiring must be carried out by personnel who have basic electrical knowledge and practical experience.

NOTE

1) Provide power from a single-phase instrument power supply. If there is a lot of noise in the power line, insert an

insulating transformer into the primary side of the line and use a line filter (recommended part: ZAC2205-00U

from TDK) on the secondary side.

As a countermeasures against noise, do not place the primary and secondary power cables close to each other.

2) For thermocouple input, use shielded compensating lead wires for wiring. For RTD input, use shielded wires

that have low conductor resistance and cause no significant differences in resistance between the three wires.

The cables to be used for wiring, terminal specifications, and recommended parts are as shown below.

3) Control output relays may be replaced. However, because they have a life of 100,000 times that of the resis-

tance load, use auxiliary relays to turn on/off a load.

4) The use of inductance (L) loads such as auxiliary relays, motors and solenoid valves causes malfunction or

relay failure; always insert a CR filter for use with alternating current or a diode for use with direct current, as

a spark-removal surge suppression circuit, into the line in parallel with the load.

5) When there is possibility of being struck by external lightening surge, use the arrester to protect the instrument.

■ For DC Relay Wiring ■ For AC Relay Wiring

UT351/UT321

UT’s contact

Diode

(Mount it directly

to the relay coil

terminal (socket).)

External DC power supply

Relay

(Use one with a relay coil rating

less than the UT’s contact rating.)

UT351/UT321

UT’s contact

CR filter

(Mount it directly

to the relay coil

terminal (socket).)

External AC power supply

Relay

(Use one with a relay coil

rating less than the UT’s

contact rating.)

● Cable Specifications and Recommended Cables

Purpose Name and Manufacturer

Power supply, grounding, relay contact outputs

600 V PVC insulated wires, JIS C 3307, 0.9 to 2.0 mm

Thermocouple Shielded compensating lead wires, JIS C 1610, X- - -

(See Yokogawa Electric's GS 6B1U1-E.)

RTD Shielded wires (three conductors), UL2482 (Hitachi Cable)

Other signals Shielded wires

● Recommended Terminal Lugs

3.7mm

7 mm or less

3.7mm

7 mm or less

0.3 to 1.65 mm

0.8 N·m or less

Applicable wire size Tightening torque

● Terminal Covers (Optional parts)

Target Model Part Number Sales Unit

For UT351

T9115YD 1

For UT321

T9115YE 1

5. Hardware Specifications

PV Input Signals

• Number of inputs: 1 (terminals

)

• Input type: Universal input system. The input type can be

selected with the software.

• Sampling period: 250 ms

• Burnout detection: Functions at TC, RTD, standard signal

(0.4 to 2 V or 1 to 5 V)

Upscale, downscale, and off can be specified.

For standard signal, burnout is determined to have occurred

if it is 0.1 V or less.

• Input bias current: 0.05 A (for TC or RTD b-terminal)

• Measurement current (RTD): About 0.13 mA

• Input resistance: 1 M or more for thermocouple or mV input

About 1 M for DC voltage input

• Allowable signal source resistance: 250  or less for

thermocouple or mV input

Effects of signal source resistance: 0.1 V/ or less

2 k or less for DC voltage input

Effects of signal source resistance: About 0.01%/100 

• Allowable wiring resistance: for RTD input

Maximum 150 /wire: Conductor resistance between three

wires should be equal

However, 10 /wire for a maximum range of -150.0 to

150.0C.

Wire resistance effect: 0.1C /10 

• Allowable input voltage: 10 V DC for thermocouple, mV, or

RTD input

20 V DC for DC voltage input

• Noise rejection ratio: 40 dB (50/60 Hz) or more in normal mode

120 dB (50/60 Hz) or more in common mode

• Reference junction compensation error: 1.0C (15 to 35C)

1.5C (0 to 15C, 35 to 50C)

• Applicable standards: JIS, IEC, DIN (ITS-90) for thermocouples

and RTD

Loop Power Supply

Supplies power to a two-wire transmitter.

(15 V DC: terminals

; 24 V DC: terminals

)

A resistor (10 to 250 ) connected between the controller

and transmitter converts a current signal into a voltage

signal, which is then read via the PV input terminal.

Supply voltage: 14.5 to 18.0 V DC, max. 21 mA (provided

with a protection circuit against a field short-circuit); 21.6

to 28.0 V DC, max. 30 mA (only for models with 24 V DC

loop power supply)

When using the 24 V DC loop power supply of the UT321,

keep the operating ambient temperature between 0C and

40C.

Retransmission Output

Either PV, target setpoint, or control output is output.

Either the retransmission output or the loop power supply

can be used with terminals

• Number of outputs: 1 (terminals

)

• Output signal: 4-20 mA DC

• Load resistance: 600  or less

• Output accuracy: 0.3% of span under standard operating

conditions (23 2C, 55 10% RH, power frequency of

50/60 Hz)

Control Output

Universal output system, The output type can be selected

with the software.

• Current output (Standard type: terminals

; Heating side:

terminals

; Cooling side: terminals

)

Number of outputs 1 or 2 (two for heating/cooling type),

switched between a voltage pulse output

and current output.

Output signal 4-20 mA DC

Load resistance 600  or less

Output accuracy  0.3% of span under standard operating

conditions (23  2 C, 55 10% RH,

power frequency of 50/60 Hz)

• Voltage pulse output (Standard type: terminals

; Heating

side: terminals

; Cooling side: terminals

)

Number of

outputs

1 or 2 (two for heating/cooling type),

switched between a voltage pulse output and current output.

Output signal

On-voltage = 12 V or more (load resistance: 600  or more)

Off-voltage = 0.1 V DC or less

Resolution

10 ms

• Relay contact output (Standard type: terminals

; Heating

side: terminals

; Cooling side: terminals

)

Number of outputs

1 or 2 (two for heating/cooling type)

Output signal Three terminals (NC, NO, and common) /

Two terminals

Contact rating Terminals - - :

250 V AC or 30 V DC, 3 A (resistance load)

Terminals - :

240 V AC or 30 V DC, 1A (resistance load)

Resolution 10 ms

2 3

Contact Inputs

• Purpose: Selection between target setpoints or Auto/Man modes,

or for other purposes

• Number of inputs: 2

• Input type: Non-voltage contact or transistor open collector input

• Input contact rating: 12 V DC, 10 mA or more

• On/off determination: For non-voltage contact input, contact

resistance of 1 k or less is determined as “on” and contact

resistance of 20 k or more as “off.”

For transistor open collector input, input voltage of 2 V or

less is determined as “on” and leakage current must not

exceed 100 A when “off.”

• Minimum status detection hold time: About 1 second.

Contact Outputs

• Purpose: Alarm output, FAIL output, and others

• Number of outputs: 3

• Relay contact rating: 240 V AC/1 A or 30 V DC/1 A ; 1a (COM

terminal is common), (FAIL output ; 1b)

Display Specifications

• PV display:

UT351: 4-digit, 7-segment green or red LED display,

character height of 20 mm

UT321: 4-digit, 7-segment green or red LED display,

character height of 12 mm

• Setpoint display: 4-digit, 7-segment red LED display, character

height of 9.3 mm (for both UT351 and UT321)

• Status indicating lamps: LEDs

150mm150mm

150mm

Front panel

of controller

Must not

exceed 30

30

Rear of

controller

Large bracket

(top mounting hardware)

Terminal board

Small bracket

(bottom mounting hardware)

Panel

Insert a screwdriver into the

brackets to tighten the screws.

Direction to insert the

controller

Insert the controller

into the opening at

the front of the panel.

User’s

Manual

IM 05D01D12-01E

Models UT351 / UT321

Digital Indicating Controllers

with Active Color PV Display

User’s Manual Installation

3rd Edition: Apr. 1, 2003

Fold the cover in the direction

of the arrow.

Fit the cover hold

over the protrusion

on the mounting bracket.

Figure A

Figure B

1. Before attaching the terminal cover, bend the side with

the groove inward as shown in Fig. A. Be careful not to

bend it backwards. This not only marks it harder to

attach the cover but will also weaken its hold.

2. Fit the holes on the top and bottom of the terminal cover

the projections on the brackets (Fig. B) and lock in

place. The figure right shows the attachment of a

terminal cover to UT controller.

Safety and EMC Standards

• Safety: Compliant with IEC1010-1: 1990 and EN61010-1:

1993+A2:1995

Approved by CSA1010

CSA1010 installation category (overvoltage category) :

CATII (IEC1010-1)

Approved by UL508

(UT321:Application for certification made)

• EMC standards: Complies with EN61326.

The instrument continues to operate at a measuring

accuracy of within 20% of the range during tests.

(UT321:To be obtained)

Construction, Installation, and Wiring

• Construction: Only the front panel is dust-proof and drip-proof

(protection class IP55)

For side-by-side close installation the controller loses its

dust-proof and drip-proof protection.

• Material: ABS resin and polycarbonate

• Case color: Black

• Weight: About 1 kg or less

• Dimensions:

UT351  96 (W)  96 (H)  100 (depth from panel face)

UT321  48 (W)  96 (H)  100 (depth from panel face)

• Installation: Panel-mounting type. With top and bottom

mounting hardware (1 each)

• Panel cutout dimensions:

UT351  92

+0.8

(W)  92

+0.8

(H) mm

UT321  45

+0.6

(W)  92

+0.8

(H) mm

• Installation position: Up to 30° upward facing

(not designed for facing downward)

• Wiring: M3.5 screw terminals (for signal wiring and power/

ground wiring as well)

Power Supply Specifications

• Power supply: Rated voltage of 100 to 240 V AC (10%), 50/60 Hz

• Power consumption: Max. 20 VA (8.0 W max.)

• Internal fuse rating: 250 V AC, 1.6A time-lug fuse

• Data backup: Non-volatile memory (can be written to up to

100,000 times)

• Withstanding voltage

- Between primary terminals* and secondary terminals**:

At least 1500 V AC for 1 minute (Note)

- Between primary terminals* and grounding terminal:

At least 1500 V AC for 1 minute (Note)

- Between grounding terminal and secondary terminals**:

At least 1500 V AC for 1 minute

- Between secondary terminals**:

At least 500 V AC for 1 minute

* Primary terminals indicate power terminals and relay

output terminals

** Secondary terminals indicate analog I/O signal, voltage

pulse output, and contact input terminals

Note: The withstanding voltage is specified as 2300 V AC

per minute to provide a margin of safety.

• Insulation resistance: 20 M or more at 500 V DC between

power terminals and grounding terminal

• Grounding: Class 3 grounding (grounding resistance of 100 

or less)

Signal Isolations

• PV input terminals: Isolated from other input/output terminals.

Not isolated from the internal circuit.

• 15 V DC loop power supply terminals: Not isolated from 4-20

mA analog output and voltage pulse control output. Isolated

from other input/output terminals and internal circuit.

• 24 V DC loop power supply terminals: Isolated from the 15 V

DC loop power supply terminals, 4-20 mA analog output

terminals and voltage pulse control output terminals, other

I/O terminals and the internal circuitry.

• 4-20 mA analog output terminals (for control output and

retransmission): Not isolated between 4-20 mA outputs nor

from 15 V DC loop power supply and voltage pulse control

output. Isolated from other input/output terminals and

internal circuit.

• Voltage pulse control output terminals: Not isolated from 4-20

mA outputs and 15 V DC loop power supply. Isolated from

other input/output terminals and internal circuit.

• Relay contact control output terminals: Isolated between contact

output terminals and from other input/output terminals and

internal circuit.

• Contact input terminals: Not isolated between contact input

terminals and from communication terminals. Isolated from

other input/output terminals and internal circuit.

• Relay contact alarm output terminals: Not isolated between

relay contact alarm outputs. Isolated from other input/

output terminals and internal circuit.

• RS-485 communication terminals: Not isolated from contact

input terminals. Isolated from other input/output terminals

and internal circuit.

• Power terminals: Isolated from other input/output terminals and

internal circuit.

• Grounding terminals: Isolated from other input/output terminals

and internal circuit.

Environmental Conditions

• Normal operating conditions:

Ambient temperature: 0 to 50C (40C or less for side-by-side

close installation)

When using the 24 V DC loop power supply of the UT321,

keep the operating ambient temperature between 0C and

40C.

Temperature change rate: 10C/h or less

Ambient humidity: 20 to 90% RH (no condensation allowed)

Magnetic field: 400 A/m or less

Continuous vibration at 5 to 14 Hz: Full amplitude of 1.2 mm or

less

Continuous vibration at 14 to 150 Hz: 4.9 m/s

or less

Short-period vibration: 14.7 m/s

, 15 seconds or less

Shock: 147 m/s

or less, 11 ms

Installation height: Height above sea level of 2000 m or less

Warm-up time: 30 minutes or more after power on

• Transportation and storage conditions:

Temperature: -25 to 70C

Temperature change rate: 20C/h or less

Humidity: 5 to 95% RH (no condensation allowed)

• Effects of changes in operating conditions

- Effects from changes in ambient temperature:

- On voltage or thermocouple input, 1 V/C or 0.01%

of F.S./C, whichever is larger

- On RTD input, 0.05C /C (ambient temperature) or less

- On analog output, 0.05% of F.S./C or less

- Effects from power supply fluctuation (within rated voltage

range)

- On analog input, 1 V/10 V or 0.01% of F.S./10 V,

whichever is larger

- On analog output, 0.05% of F.S./ 10 V or less

1 2 3 4 5 6 7 8

Summary of Contents

Page 1 - User’s Manual Installation

IM 05D01D12-01E (1)This manual describes installation, wiring, and other tasks required to make the controller ready for operation.Contents1. Safety P

Page 2 - Receiving 4-20 mA DC Current

IM 05D01D12-01E (2) UT351 Standard Type (Model UT351-0䊐 or UT351-3䊐) or Heating/Cooling type(Model UT351-2䊐)12Relay contact output 3Control outputNCN

Page 3

IM 05D01D12-02E (1)This manual describes examples of setting PV input types, control output types, and alarm types. Carrying out settingsdescribed her

Page 4 - User’s Manual Operations

IM 05D01D12-02E (2)This manual describes key entries for operating the controller. For operations using external contact inputs, see “6. TerminalWirin

Page 5 - User’s Manual Parameters

IM 05D01D02-03E (1)CABPVMANA/MSPAL1 2 3SP234SET/ENTPVMANA/MSPAL1 2 3SP234SET/ENTPVMANA/MSPAL1 2 3SP234SET/ENTPVMANA/MSPAL1 2 3SP234SET/ENTPVMANA/MSPAL

Page 6 - 2. Lists of Parameters

IM 05D01D02-03E (2)2. Lists of Parameters Operating ParametersParameter SymbolName of Parameter Setting Range and Description Initial ValueUser Setti

Page 7

IM 05D01D12-04E3rd Edition : Apr. 1, 2003User’sManualModels UT351 / UT321Digital Indicating Controllerswith Active Color PV DisplayUser’s Manual Se

Page 8 - ■ External RJC

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UNI-T UT321 User Manual Page 1

Browse online or download User Manual for Multimeters UNI-T UT321. UNI-T UT321 User`s manual

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