Yokogawa UT32A Specifications

General

Specications

UT32A
Digital Indicating Controller

(Entry model)

GS 05P01F31-01EN

n Overview

The UT32A entry model digital indicating controller is

an easily congurable single-loop controller that can
generate relay, voltage pulse, or current signals for
control output. The short depth of the controller helps
save instrument panel space.

n Features

• A 14-segment, active (PV display color changing
function) color LCD display is employed.

Two ve-digit, high-resolution displays are possible.
Alphabet letters can be displayed in an easy-to-read

manner. The guide display shows parameter names.

• Easy to operate
Navigation keys (SET/ENTER and Up/Down/Left/
Right arrow keys) are employed to facilitate making
settings.

• 65 mm depth

The small depth enables the mounting in a thin and

small instrumented panel.

• Quick setting function
Setting only the minimum necessary parameters for
operation is possible.

• Equipped with a multitude of functions
Universal I/O is included as standard. PID control,

ON/OFF control, etc. are available.

• LL50A Parameter Setting Software (sold separately)

The parameters of UTAdvanced digital indicating

controller can be built from a PC using this software.

It makes data management even easier.

• Dust-proof and drip-proof

IP66 (for front panel) (Not applicable to side-by-side

close mounting.)

NEMA4 (Hose-down test only)

nFunctionalSpecications

ControlSpecications

(1) Control Mode

Single-loop control

(2) Control period

200 ms

Control Computation Function

(1) Types of control

• PID control

• ON/OFF control

(2) Control Computation Function

(a) Target setting point and the number of PID param-

eter groups

Respectively, four sets of target setpoints, alarm

setpoints, and PID parameters can be set.

Functional

Enhancement

(b) Selecting the PID parameter group

The following PID parameter groups can be selected.

• Target setpoint number (SPNO) (The PID number
can be set arbitrarily.)

• Measured input zone PID

• Target setpoint zone PID

• Reached target setpoint zone PID

(c) Auto-tuning

• Tuning results can be selected from two options,
Normal or Stable.

• Tuning output limit can be set.

(d) “Super” function: Overshoot-suppressing function
(e) “Super 2” function: Hunting-suppressing function
(f) STOP preset output function
(g) Input ERROR preset output function
(h) MANUAL preset output function

(3) Operation Mode Switching

Operation mode

switching

AUTO/MANUAL and RUN/STOP switching

(4) Control Parameter Setting Range

Proportional band 0.1 to 999.9%

Integral time 1 to 6000 sec. or OFF (using manual reset)

Derivative time 1 to 6000 sec. or OFF

ON/OFF control

hysteresis (one or two

hysteresis points)

Preset output

value

High/low output

limiter

Tight shut

function

Rate-of-change

limiter of output

0.0 to 100.0% of measured input range width

-5.0 to 105.0% (however, 0 mA or less cannot

be output)

-5.0 to 105.0%
Low limit setpoint < high limit setpoint

When manual control is carried out with 4 to

20 mA output, control output can be reduced to
about 0 mA.

0.1 to 100.0%/sec., OFF

Yokogawa Electric Corporation
2-9-32, Nakacho, Musashino-shi, Tokyo, 180-8750 Japan
Tel.: [phone] Fax.: [phone]

GS 05P01F31-01EN

1st Edition Mar.31, 2015 (YK)

2

Alarm Functions

• Types of Alarm

Measured value

alarm

Deviation alarm

Rate-of-change

alarm

Setpoint alarm

Output alarm Control output high/low limit alarm

Other alarms

PV (measured value) high/low limit alarm
Deviation high/low limit alarm
Deviation high and low limits alarm
Deviation within high and low limits alarm
Analog input PV high/low limit alarm
PV rate-of-change alarm
SP (setpoint) high/low limit alarm
Target SP high/low limit alarm
Target SP deviation high/low limit alarm
Target SP deviation high and low limits alarm
Target SP deviation within high and low limits alarm

Self-diagnosis alarm
FAIL

• Alarm Functions

Alarm output

action

Number of alarm

settings

Number of alarm

output points

Alarm stand-by action

Alarm latch (forced reset) function
Alarm hysteresis
Alarm ON/OFF delay timer

4

2

Communication Function

Function Method Interface Targets Max con-

Modbus

(RTU/ASCII)

PC link The proprietary Yokogawa protocol allowing

Ladder A protocol to communicate to PLCs.

A standard industry protocol allowing com-

munications between the controller and

devices such as PCs, PLCs, and DCSs.

communications to PCs, PLCs and touch
panels.

*1: UT digital indication controllers can be connected.

Slave RS-485 PLC and others, UT75A/UT55A/

UT52A/UT35A/UT32A/UP55A/
UP35A/UP32A/UM33A

(*1)

nection

31 units PV, ALM etc

Communication

Data

Physical Interface

RS-485

Standard: EIA RS-485
Communication method: Two-wire harf-duplex or four-wire harf-duplex, start-stop synchronization, and

Baud rate: 600,1200,2400,4800,9600,19200 or 38400bps

Maximum communication distance: 1200m

Terminating resistor: 220Ω (External)

non-procedural

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GS 05P01F31-01EN Mar.31, 2015-00

3

nHardwareSpecications

DisplaySpecications

• PV display
5-digit, 14-segment active color LCD (white/red)

Character height: 13.0 mm

• Data display
5-digit, 11-segment color LCD (orange)

• Bar graph display
12-segment color LCD (orange)

UniversalInputSpecications

• Number of input points: 1

• Types of input, instrument range, and measurement

accuracy (see the table below)

Types of input

-270.0 to 1370.0°C -450.0 to 2500.0°F ±0.1% of instrument

K

-270.0 to 1000.0°C -450.0 to 2300.0°F

-200.0 to 500.0°C -200.0 to 1000.0°F

J -200.0 to 1200.0°C -300.0 to 2300.0°F

-270.0 to 400.0°C -450.0 to 750.0°F

T

0.0 to 400.0°C -200.0 to 750.0°F

B 0.0 to 1800.0°C 32 to 3300°F

S 0.0 to 1700.0°C 32 to 3100°F
R 0.0 to 1700.0°C 32 to 3100°F

N -200.0 to 1300.0°C -300.0 to 2400.0°F

E -270.0 to 1000.0°C -450.0 to 1800.0°F ±0.1% of instrument

Thermocouple

L -200.0 to 900.0°C -300.0 to 1600.0°F

-200.0 to 400.0°C -300.0 to 750.0°F

U

0.0 to 400.0°C -200.0 to 1000.0°F

(*2)

0.0 to 2300.0°C 32 to 4200°F

W

Platinel

0.0 to 1390.0°C 32.0 to 2500.0°F

2

PR20-40 0.0 to 1900.0°C 32 to 3400°F

W97

0.0 to 2000.0°C 32 to 3600°F

Re3-W75

Re25

-200.0 to 500.0°C -300.0 to 1000.0°F

JPt100

-150.00 to 150.00°C -200.0 to 300.0°F

-200.0 to 850.0°C -300.0 to 1560.0°F

(RTD) 3-wire

Resistance-temperature

detector

Standard

signal

DC voltage

DC current 0.00 to 20.00 mA -

-200.0 to 500.0°C -300.0 to 1000.0°F

Pt100

-150.00 to 150.00°C -200.0 to 300.0°F

0.400 to 2.0000 V -

1.000 to 5.000 V -

4.00 to 20.00 mA -

0.000 to 2.000 V -

0.00 to 10.00 V -

-10.00 to 20.00 mV -

Instrument range

°C °F

Accuracy

range ±1 digit for 0°C
or more
±0.2% of instrument
range ±1 digit for less
than 0°C
However, ±2% of
instrument range
±1 digit for less than

-200°C of thermocouple
K ±1% of instrument
range ±1 digit for less
than -200°C of thermo­couple T
±0.15% of instrument
range ±1 digit for 400°C
or more
±5% of instrument
range ±1 digit for less
than 400°C
±0.15% of instrument
range ±1 digit
±0.1% of instrument
range ±1 digit
±0.25% of instrument
range ±1 digit for less
than 0°C

range ±1 digit for 0°C
or more
±0.2% of instrument
range ±1 digit for less
than 0°C
However, ±1.5% of
instrument range ±1 digit
for less than -200.0°C of
thermocouple E
±0.2% of instrument
range ±1 digit
±0.1% of instrument
range ±1 digit
±0.5% of instrument
range ±1 digit for 800°C
or more
Accuracy not guaran­teed for less than 800°C

±0.2% of instrument
range ±1 digit

±0.1%

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

±0.1% of instrument
range ±1 digit

±0.1% of instrument
range ±1 digit

(*1)

of instrument

(*1)

The accuracy is that in the standard operating condi­tions: 23 ±2°C, 55 ±10%RH, and power frequency at
50/60 Hz.

*1:

±0.3°C and ±1 digit in the range between 0 and 100°C
±0.5°C ±1 digit in the range between -100 and 200°C

*2:

W-5% Re/W-26% Re (Hoskins Mfg.Co.), ASTM E988

•

Applicable standards: JIS, IEC and DIN (ITS-90) for ther­mocouples and resistance-temperature detectors (RTD)

• Input sampling period: Synchronized to control period

• Burnout detection
Upscale and downscale of function, and OFF can
be specied for the standard signal of thermocou­ple and resistance-temperature detector (RTD).
For integrated signal input, 0.1 V or 0.4 mA or less

is judged as a burnout.

• Input bias current: 0.05 μA (for thermocouple and

resistance-temperature detector (RTD))

• Resistance-temperature detector (RTD) measured

current: About 0.16 mA

• Input resistance

1 MΩ or more for thermocouple/mV input
About 1 MΩ for voltage input

About 250 Ω for current input (with built-in shunt

resistance)

• Allowable signal source resistance

250 Ω or less for thermocouple/mV input

Effect of signal source resistance: 0.1 μV/Ω or less
2 kΩ or less for DC voltage input
Effect of signal source resistance: about

0.01%/100 Ω

• Allowable wiring resistance
Up to 150 Ω per line for resistance-temperature

detector (RTD) input (conductor resistance

between the three lines shall be equal)

Effect of wiring resistance: ±0.1°C/10 Ω

• Allowable input voltage/current

±10 V DC for thermocouple/mV/mA or resistance­ temperature detector (RTD) input
±20 V DC for V input
±40 mA DC for mA input

• Noise reduction ratio
40 dB or more (at 50/60 Hz) in normal mode
120 dB or more (at 50/60 Hz) in common mode

• Reference junction compensation error
±1.0°C (15 to 35°C)
±1.5°C (-10 to 5°C and 35 to 50°C)

AnalogOutputSpecications(Sufx code:-C)

• Number of points

Control output: 1 point

• Output functions
Current output

• Current output
4 to 20 mA DC or 0 to 20 mA DC/load resistance

600 Ω or less

• Current output accuracy
±0.1% of span (however, ±5% of span for 1 mA
or less)
The accuracy is that in the standard operating
conditions: 23 ±2°C, 55 ±10%RH, and power
frequency at 50/60 Hz

AnalogOutputSpecications(Sufx code:-V)

• Number of points

Control output: 1 point

• Output functions
Voltage pulse output

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GS 05P01F31-01EN

Mar.31, 2015-00

4

The circuits divided by lines are insulated mutually.

• Current output
4 to 20 mA DC or 0 to 20 mA DC/load resistance

600 Ω or less

• Voltage pulse output
Application: time proportional output
ON voltage: 12 V or more/load resistance of 600

Ω or more

OFF voltage: 0.1 V DC or less
Time resolution: 10 ms or 0.1% of output value,
whichever is larger

ContactInputSpecications(Sufx code:-R)

• Types of contact and number of points

Control relay output: one, 1c-contact point

• Input type: no-voltage contact input or transistor con­tact input

• Contact rating

1c-contact: 3 A at 250 V AC or 3 A at 30 V DC
(resistance load)

*: The control output should always be used with a

load of 10 mA or more.

• Application: ON/OFF output or time proportional
output

• Time resolution for control output: 10 ms or 0.1% of
output value, whichever is larger

RelayContactOutputSpecications

• Types of contact and number of points

Alarm output: 2, 1a-contact points (Common is

separated)

• Contact rating

1a-contact:
For alarm output: 1 A at 240 V AC or 1 A at
30 V DC (resistance load)

*: The alarm output should always be used with a load of 1

mA or more.

• Application: alarm output, FAIL output, etc.

24VDCLoop PowerSupplySpecications

(for /LP Option)

•

Application: Power is supplied to the 2-wire transmitter.

• Supply voltage: 21.6 to 28.0 V DC

• Rated current: 4 to 20 mA DC

• Maximum supply current: About 30 mA (with short-

circuit current limiting circuit)

Safety and EMC Standards

• Safety:
Compliant with IEC/EN61010-1 (CE), IEC/EN61010-

2-030 (CE), approved by CAN/CSA C22.2 No.
61010-1 (CSA), approved by UL61010-1.

Installation category: II
Pollution degree: 2
Measurement category: I (CAT I) (UL, CSA)
O (Other) (CE)
Rated measurement input voltage: Max. 10 V DC
Rated transient overvoltage: 1500 V (

*:

This is a reference safety standard value for measure­ment category I of IEC/EN/CSA/UL61010-1. This value is
not necessarily a guarantee of instrument performance.

*)

• EMC standards:
Compliant with
CE marking

EN 61326-1 Class A, Table 2 (For use in industrial

locations),
EN 61326-2-3

*:

The instrument continues to operate at a measurement
accuracy of within ±20% of the range during testing.

EN 55011 Class A, Group 1
EN 61000-3-2 Class A
EN 61000-3-3

EMC Regulatory Arrangement in Australia and New Zealand

EN 55011 Class A, Group 1

• KC marking: Electromagnetic wave interference
prevention standard, electromagnetic wave protection
standard compliance

PowerSupplySpecicationsand Isolation

• Power supply
Rated voltage: 100 to 240 V AC (+10%/-15%), 50/60 Hz

/DC option is specied)

• Power consumption: 15 VA (For the /DC option. DC:

7 VA, AC: 11 VA)

• Storage: Nonvolatile memory

•

Allowable power interruption time: 20 ms (at 100 V AC)

• Withstanding voltage

2300 V AC for 1 minute between primary and

secondary terminals (UL, CSA)

3000 V AC for 1 minute between primary and

secondary terminals (CE)

1500 V AC for 1 minute between primary terminals
500 V AC for 1 minute between secondary

terminals
(Primary terminals = Power (*) and relay output
terminals, Secondary terminals = Analog I/O signal
terminals, communication terminals,
and functional grounding terminals.)

*: Power terminals for 24 V AC/DC models are the

• Insulation resistance

Between power supply terminals and a grounding

terminal: 20 MΩ or more at 500 V DC

• Isolation specications

24 V AC/DC (+10%/-15%) (When the

secondary terminals.

All Rights Reserved. Copyright © 2015, Yokogawa Electric Corporation

PV (universal) input terminal

Control (voltage pluse, analog) output terminal
Control relay (c-contact) output terminal

Alarm-1 relay (a-contact) output terminal

Alarm-2 relay (a-contact) output terminal

RS485 communication terminal

24 V DC loop power supply terminal

GS 05P01F31-01EN Mar.31, 2015-00

Internal
circuits

Power
supply

Environmental Conditions

Normal operating conditions

• Ambient temperature: -10 to 50°C (-10 to 40°C for
side-by-side mounting of controllers)

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

• Magnetic eld: 400 A/m or less

• Continuous vibration (at 5 to 9 Hz) Half amplitude of

1.5 mm or less
(at 9 to 150 Hz) 4.9 m/s2 or less, 1 oct/min for 90 min­utes each in the three axis directions

• Rapid vibration: 14.7 m/s2, 15 s or less

• Impact: 98 m/s

2

or less, 11 msec.

• Installation altitude: 2,000 m or less above sea level

• Warm-up time: 30 minutes or more after the power is
turned on

• Start-up time within 10 s

Transportation and Storage Conditions

• Temperature: -25 to 70°C

• Temperature change rate: 20°C per hour or less

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

Effects of Operating Conditions

• Effect of ambient temperature

For voltage or TC input:

±1 μ V/°C or ±0.01% of F.S. (instrument

range)/°C, whichever is greater

For RTD input:

±0.05°C/°C (ambient temperature) or less

For current input:
±0.01% of F.S. (instrument range)/°C
For analog output:

±0.02% of F.S./°C or less

• Effect of power supply uctuation:

For analog input: ±0.05% of F.S. (instrument range)

or less

For analog output: ±0.05% of F.S. or less

(Each within rated voltage range)

5

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GS 05P01F31-01EN

Mar.31, 2015-00

n Block Diagram

Equipped as standard

Single Loop Control

PV input

PV

6

Input type

Input unit

Input range/scale

PV input bias

PV input filter

IN

UNIT

RH, RL SDP SH, SL

BS

FL

Input error preset output

Manual preset output

Manual operation

Output limiter

Preset output

PV display SP display

EPO

When sensor burnout occurs

MPON

OH, OL OLMT

PO

MAN

A/M

Communication

Ratio bias computation

Control computation

CNT ALG

Output limiter

Normal

AUTO

S/R

RT RBS

LOCALREMOTE

R/L

SP limiter

SP ramp rate

OH, OL

AUTO (ON)/MAN (OFF) switch

STOP (ON)/RUN (OFF) switch

RUNSTOP

SPH, SPL

UPR, DNR TMU

SPNO SP

Target setpoints 1 to 4

For optional suffix code /LP

24 V loop

power supply

LPS

OUTOUT AL2AL1

CurrentRelay

(Suffix code: -C)(Suffix code: -R) (Suffix code: -V)

OUT

Voltage pulse

Legend

Terminal Parameter Function

Analog signal Contact signal Front panel key

Equipped as standard

Alarm

Alarm 1

Alarm 2

(PV high limit)

(PV low limit)

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GS 05P01F31-01EN Mar.31, 2015-00

n Terminal Arrangement

as standard)

Relay contact rating: 240 V AC, 1 A

100-240 V AC

50/60 Hz shared

(Suffix code: Type 2=1)

RS-485 communication

RS-485

SDB(+)

SDA(-)

RDB(+)

RDA(-)

(Suffix code: Type1=-R)

Control output

Relay contact output

NC

101

NO

102

COM

103

Contact rating: 250 V AC, 3 A
30 V DC, 3 A (resistance load)

Contact output

External contact output (relay)

Alarm-2 output

(PV low limit)

Common

Alarm-1 output
(PV high limit)

Common

30 V DC, 1 A (resistance load)

RS485

301

302

SG

303

304

305

OUT

ALM

106

AL2

107

108

AL1

109

(Optional suffix code /LP)

(Equipped
as standard)

UT

24 V DC loop power supply

24 V DC loop power supply

21.6-28.0 V DC
(Max. 30 mA DC)

LPS24

+

305

-

306

E1-terminal area

101

-112

101

102

103

104

105

106

107

108

109

110

111

112

(

Suffix code: Type 2=1 and

optional suffix code /LP)

RS-485 communication/24 V DC loop power supply

301

302

303

304

305

306

201

-212

201

202

203

204

207

208

RS-485

RSB(+)

RSA(-)

301

302

SG

303

24 V DC loop power supply

21.6-28.0 V DC
(Max. 30 mA DC)

+

305

-

306

RS485/LPS24

PV input

TC input RTD input

+

-

Current (mA) input

-

+

Factory default:
PV input type is
undefined.

PV

202

203

Voltage (mV, V) input

203

204

(Equipped

A

201

b

202

B

203

+

202

-

203

7

Power supply

power supply

N

L

Allowable range:
100-240 V AC (+10%/-15%)
(free voltage)

24 V AC/DC power supply

110

111

112

(24 V AC/DC power supply:
Optional suffix code /DC)

N

-

110

L

+

111

112

(Suffix code: Type1=-V or -C)

Control output

Current/voltage pulse output

+

0-20 mA DC,
4-20 mA DC,
Voltage pulse (12 V)

207

-

208

OUT

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GS 05P01F31-01EN

Mar.31, 2015-00

n External Dimensions and Panel Cutout Dimensions

11

Terminal cover (option)

• General mounting

48

65

Bracket

20

8

Unit:mm

92

(53)

+0.8

96

1 to 10 mm (panel thickness)

• Side-by-side close mounting

70 min.

0

+0.8

92

145

min.

0

+0.6

45

(25)

0

“N” stands for the number of controllers to be
installed.
However, the measured value applies if N≥5.

Normal tolerance:
±(value of JIS B 0401-1998 tolerance class IT18)/2

91.6

94.6

Bracket

[(N-1)×48+45]

105.2

+0.6

0

n Construction, Mounting, and Wiring

• Dust-proof and drip-proof: IP66 (Front panel) (Except for side-by-side close mounting)/NEMA4 *

*: Hose-down test only

•

Material: Polycarbonate resin (Flame retardancy: UL94 V-0)

• Case color: White (Light gray) or Black (Light Charcoal gray)

• Weight: 0.5 kg or less

• External dimensions (mm): 48 (width) x 96 (height) x 65 (depth from the panel surface)

• Mounting: Direct panel mounting; mounting bracket, one each for upper and lower mounting

• Panel cutout dimensions (mm): 45+

• Mounting position: Up to 30 degrees above the horizontal. No downward titling allowed.

• Wiring: M3 screw terminal with square washer (signal wiring and power)

0.6/0

(width) x 92+

0.8/0

(height)

nModelandSufxCode

Model Sufxcode Optionalsufxcode Description

UT32A

Type 1:
Basic control

Type 2:Functions

Type 3:Fixed code 0 None

Display language

Case color

Fixed code -00 Always "-00"

Optional sufx codes

-V

-C

-R

0 None
1 RS-485 communication (Max. 38.4 kbps, 2-wire/4-wire)

-1 English (Default. Can be switched to other language by the setting.)

(*2)

-2 German (Default. Can be switched to other language by the setting.)

-3 French (Default. Can be switched to other language by the setting.)

-4 Spanish (Default. Can be switched to other language by the setting.)
0 White (Light gray)
1 Black (Light charcoal gray)

/LP 24 V DC loop power supply
/DC Power supply 24 V AC/DC
/CT Coating

/CV Terminal cover

*1: When the /LP option is specied, the RS-485 communication of the Type 2 code “1” is 2-wire system.
*2: English, German, French, and Spanish are available for the guide display.
*3: When the /CT option is specied, the UT32A does not conform to the safety standards (UL and CSA) and CE marking (Prod-

ucts with /CT option are not intended for EEA-market).

All Rights Reserved. Copyright © 2015, Yokogawa Electric Corporation

Digital Indicating Controller (Power supply: 100-240 V AC) (provided with
2 DOs)
Voltage pulse output type
Current output type
Relay output type

(*1)

(*3)

GS 05P01F31-01EN Mar.31, 2015-00

nItemstobespeciedwhenordering

Model and sufx codes, whether User’s Manual and

QIC required.

n Standard accessories

Brackets (mounting hardware), Unit label, Operation

Guide

n Special Order Items

Model code

LL50A

X010

*: Necessary to input the current signal to the voltage

input terminal.

Name

Terminal cover (for UT32A) UTAP002

User’s Manual (CD) UTAP003

User’s Manual

Product user’s manuals can be downloaded or viewed
at the following URL. To view the user’s manual, you
need to use Adobe Reader 7 or later by Adobe Sys-

tems.

URL:http://www.yokogawa.com/ns/ut/im/

Sufxcode Description

-00 Parameter Setting Software

See the General Specications

Resistance Module

(*)

Model

9

All Rights Reserved. Copyright © 2015, Yokogawa Electric Corporation

Subject to change without notice.

GS 05P01F31-01EN Mar.31, 2015-00