Yokogawa UT320 Data sheet

<<Contents>> <<Index>>

General
Specifications

Model UT320
Digital Indicating Controller

GS 05D01D02-02E

■General

Model UT320 Digital Indicating Controller is a highly
accurate 1/8 DIN controller, provided with universal input/
output. It has a large display for readings and excellent
monitoring operability with the Auto/Man switching key. In
addition, heating/cooling control, including PID control
with auto-tuning, the overshoot suppressing function
“SUPER” and the hunting suppressing function “SUPER2”
are available as control functions, and a retransmission of
variables or a 15V DC loop power supply are also
equipped as standard. A communication function or 24V
DC loop power supply is available optionally. As described
above, the UT320 is a controller provided with higher
functions and capability than conventional similar-size
controllers.

■Main Features

• The latest in large digital displays has been realized and a
large PV display with characters 12 mm in height has been
employed to be clearly readable from distant locations.

• Universal input and output enable users to set or change
freely the type of measured inputs (thermocouple, RTD or
DCV), measurement range, type of control output (4 to 20
mA current, voltage pulse, or relay contact), etc. from the
front panel.

• Parameters can be easily set using a personal computer.
("Parameter setting tool (model LL100)" sold separately is
required.)

• Various communication function are provided. Communi­cation is possible with personal computer, programable
logic controller, and other controllers.

■Function Specifications

UT320

UT320E

“E” indicates the model
with expanded functions.

Reference point = Measuring input range (0%) 

Reference point hysteresis = Fixed to 0.5% of the
Reference deviation method:

Reference deviation = OFF or 0.1 to 100.0% of

Measuring input range (100%)

Reference point 2

Reference point 1  Reference point 2 
Measuring input range (100%)

measured input range width.

PID parameters (No. 4 PID) are selected
when the deviation exceeds the reference
deviation. This process takes precedence
over the reference point method.

measured input range width

Reference deviation

Reference deviation

No.3PID

● Control Computation Functions

Control computation:

Can be selected from the following types:
Continuous PID control, Time-proportional PID
control, Heating/Cooling control (for heating/

cooling type only) or Relay ON/OFF control.
Control cycle time: 250 ms
Number of sets of target setpoints and PID parameters: 4
Target setpoint and PID selection:

PID parameters are provided for every target

setpoint and the set of PID parameters are

selected at the same time that the setpoint

number is selected.
Zone PID selection:

PID parameters are selected depending on the

value of the PV. For selection, the reference

point (PID parameter selection setpoint) or the

reference deviation is used.

Reference point method:

The measuring input range is divided into a
maximum of three zones with up to two
reference points, and PID parameters are
selected (No. 1 PID to No. 3 PID) for every
zone.

No.2PID

Reference point 1

No.1PID

Measuring input range (0%)

Measured value (PV)

Auto-tuning:

Available as standard. If auto-tuning is
operated, PID parameters are automatically set
(limit cycle method).

“SUPER” function:

Overshoots generated by abrupt changes in the
target setpoint or by disturbances can be
suppressed.

“SUPER2” function:

The function stabilizes the state of control that
is unstable due to hunting, etc. without
requiring any change in PID constants, when
the load and/or gain varies greatly, or when
there is a difference between the characteris­tics of temperature zones.

GS 05D01D02-02E

©Copyright Feb. 2000

3rd Edition Jul. 2004

<<Contents>> <<Index>>

2

Control Parameters Setting Range

Proportional band = 0.1 to 999.9%

0.0 to 999.9% (for heating/cooling control,

0.0% for ON/OFF control)
Integral time = 1 to 6,000 s, or OFF (manual reset)
Derivative time = 1 to 6,000 s, or OFF
Manual reset value = -5.0 to 105.0% of output range

(functions when integral time is off.)

ON/OFF control hysteresis = 0.0 to 100.0% of measured

input range width (0.1 to 0.5% for heating/
cooling control)

Setpoint rate-of-change setting = off, or 0.0 to 100.0%/h or

min. of measured input range width
A PV tracking function operates automatically
when the setpoint is changed, the power is
turned on, or the mode is changed from
manual to automatic.

Direct/reverse action:

The output increase/decrease direction can be
defined corresponding to a positive or
negative deviation.
For heating/cooling control, it is fixed; for the
heating side output, reverse, for the cooling
side output, direct.

Anti-reset windup:

When controller output is limited, normal
integration is superseded by an anti-reset
windup computation to suppress over­integration.

Control output cycle time = 1 to 1000 s (for Time-

proportional PID control) and (the cooling
side output cycle time is also the same when

heating/cooling control is used).
Preset output value = -5.0 to 105.0% of output range
Output tracking: Whether the output bump is provided or

not can be selected by changing the PID

control mode.
Output limiter

Upper limit = Lower limit to 105.0% of output

range

Lower limit = -5.0% of output range to upper

limit
Heating/cooling dead band = -100.0 to 50.0% for output

range

● Signal Computation Functions

Measured input computation:

Bias addition (-100.0 to 100.0% of measured

input range width), and first-order lag filter

(time constant off or 1 to 120 s)
Contact input function:

Target setpoint selection, Auto/Man operating

mode switching, key lock parameter display/

non-display switching

Target setpoint selection can be done for

either a 2-setpoint or 4-setpoint selection.

• If the 2-setpoint selection is set, Auto/Man

mode switching can be used as well.

• If the 4-setpoint selection is set, Auto/Man

switching and key lock parameter display/non-

display switching cannot be used together.

If key lock parameter display/non-display

switching is used, target setpoint selection and

Auto/Man mode switching cannot be used.

● Alarm Functions

Eighteen types of alarm functions are provided. The alarm
status is indicated by the alarm lamp on the front panel.
Also, three points among them can be output as relay contact
outputs.

Alarm types:

PV high limit, PV low limit, Deviation high
limit, Deviation low limit, Deenergized on
deviation high limit, Deenergized deviation
low limit, Deviation high and low limits, High
and low limits within deviation, Deenergized
on PV high limit, Deenergized on PV low
limit, SP high limit, SP low limit, Output high
limit, Output low limit,Heater disconnection
alarm, Sensor prounding alarm,FAIL output.

Alarm output:

3 points. Any three points can be output as
contact outputs among the above alarm. For
heating/cooling control, if cooling side output
is output as a relay contact, up to two alarm
outputs can be used.

Setting ranges for PV, deviation, setpoint and output alarms:

PV/setpoint alarm:

-100.0 to 100.0% of measured input range

Deviation alarm:

-100.0 to 100.0% of measured input range
width

Output alarm:

-5.0 to 105.0% of output range

Alarm hysteresis width:

0.0 to 100.0% of measured input range width

Delay timer:

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:

Stand-by action can be set to make PV/
deviation alarm OFF during start-up or after
SP change until SP reaches the normal region.

Heater disconnection alarm (optional):

two circuits incorporated
A heater disconnection alarm is output if the
heater current consumption is the disconnec­tion detection value or less. This alarm can be
used for Relay ON/OFF control or time­proportional PID control.

Heater current setting range: 0.0 to 50.0 A
Setting accuracy: ±5% of span ± 1 digit
Heater current detecting resolution: 0.5 A
Time required until disconnection detection is on: 0.2 s

minimum

Disconnected sensor model: CTL-6-S-H (URD Co. Ltd.)

Sensor grounding alarm:

An alarm is output after detecting a change in
control output. If the moving average * of
control output is out of the setting range
(between the high and low limits of the on/off
rate) in spite of the deviation being within a
fixed range (on/off rate detection width) and
control being in stable condition, the sensor is
judged to be in a grounding condition.

* Moving a ver age refers to the av erage value for output

values sampled (fiv e times) in ev ery cycle time .

High- and low-limit setting range of on/off rate:

-5.0 to 105.0% of output range

Detection width of on/off rate:

0.0 to 100.0% of measured input range
width.

Fault diagnostic alarm:

Input burnout, A/D conversion error,
thermocouple reference junction compensa­tion error

FAIL output: Software failure and/or hardware failure

When in Fail, control output, retransmission
output and alarm output become 0% or off.

All Rights Reserved. Copyright © 2000, Yokogawa Electric Corporation

GS 05D01D02-02E 3rd Edition Jul. 30, 2004-00

<<Contents>> <<Index>>

● Display and Operation Function

PV display: In 4-digit digital display for engineering data
Setpoint display:

Various data, such as the setpoint (SP), are

displayed by selection on the 4-digit digital

display.
Status indicating lamps:

3 alarm indicator lamps: AL1, AL2, AL3
3 setpoint number indicator lamps:

SP2, SP3, SP4 (Go out when SP1 is selected.)

MAN operation mode lamp: MAN (lit in MAN mode)

Operation keys:

쑶 and 쑴 keys:

Increases or decreases setpoints and various
parameters.

SET/ENT key:

For data setting or call-up/selection of
various parameters

A/M key: Switching of operation mode (Auto/Man)

SELECT display:

A panel where operating parameters that are

frequently changed during operation can be

selected and registered. For example, by

registering the alarm -1 setpoint in the

SELECT display, the setpoint can easily be

displayed during operation.
Security function:

An operation-inhibiting mode using a

password is provided.

3

Status lamps

Alarm (AL1, 2, 3), Manual (MAN).
Setpoint No (SP2, 3, 4). in use.

Communication port for light loader

Parameters are set via communication
from a personal computer.

Operational keys

Increase/Decrease the setting data (쑶,쑴)
Select parameter/Enter the setting data (SET/ENT)
A/M mode switching (A/M)

LED display unit (for PV)

Display PV, and error code when
error is detected.

LED display unit (for SP)

Display setpoint (SP), output value,
and setting item/value of parameters.

All Rights Reserved. Copyright © 2000, Yokogawa Electric Corporation GS 05D01D02-02E 3rd Edition Jul. 30, 2004-00

<<Contents>> <<Index>>

● Communication Functions (optional)

This controller has a communication function and can be
connected to a personal computer, programmable logic
controller, or other /GREEN series controllers.

Communication protocol

Computer link communication:

Communication protocol with a personal
computer.

Ladder communication:

Communication protocol with program­mable logic controller made.

MODBUS communication:

Communication protocol with a personal
computer or PCL.

Coordinated operation:

Communication protocol to coordinate
operation with two or more GREEN series
controllers. The UT320 can be connected as
a master station or a slave station.

Communication interface

Communication protocol:

Computer link, ladder communication,
MODBUS communication or coordinated

operation
Standards: EIA RS485
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, non-

procedural
Communication rate:

600, 1200, 2400, 4800, 9600 bps

4

Examples of Communication System Configuration Diagram

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

Personal computer

PV

PV

PV2

AL

1
2
3

REM

4

MAN1
MAN2
STP
CAS

A/M

DISP

SET/ENT

PV

PV2

PV2

AL

AL

1

1

2

2

3

3

REM

REM

4

4

MAN1

MAN1

MAN2

MAN2

STP

STP

CAS

CAS

A/M

A/M

DISP

DISP

SET/ENT

SET/ENT

UT350/UT320
Digital indicating controller

(3) Coordinated operation

PV

PV2

AL

1
2
3

REM

4

MAN1

UP350 Program controller

MAN2
STP
CAS

A/M

DISP

SET/ENT

or UT350/UT320 Digital indicating controller

PV

PV

PV2

AL

1
2
3

REM

4

MAN1
MAN2
STP
CAS

A/M

DISP

SET/ENT

PV

PV2

PV2

AL

AL

1

1

2

2

3

3

REM

REM

4

4

MAN1

MAN1

MAN2

MAN2

STP

STP

CAS

CAS

A/M

A/M

DISP

DISP

SET/ENT

SET/ENT

UT350/UT320
Digital indicating controller

PV

PV2

AL

1
2
3

REM

4

MAN1
MAN2
STP
CAS

A/M

DISP

SET/ENT

PV

PV2

AL

1
2
3

REM

4

MAN1
MAN2
STP
CAS

A/M

DISP

SET/ENT

MELSEC-A

PLC

PV

PV

PV2

PV2

AL

AL

1

1

2

2

3

3

REM

REM

4

4

MAN1

MAN1

MAN2

MAN2

STP

STP

CAS

CAS

A/M

A/M

DISP

SET/ENT

PV

PV2

AL

1
2
3

REM

4

MAN1
MAN2
STP
CAS

A/M

DISP

SET/ENT

DISP

SET/ENT

UT350/UT320
Digital indicating controller

PV

PV2

AL

1
2
3

REM

4

MAN1
MAN2
STP
CAS

A/M

DISP

SET/ENT

All Rights Reserved. Copyright © 2000, Yokogawa Electric Corporation

GS 05D01D02-02E 3rd Edition Jul. 30, 2004-00

<<Contents>> <<Index>>

■Hardware Specifications

Measured Input Signal

Number of input points: 1
Input system:

The types of input/measurement ranges can be
set using Key operation or software from a list
of inputs.

Input type, measurement ranges and measurement

accuracy:
Refer to the table below.

5

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 an temperature range from -100 to 0°C and 100 to 200°C.

K

J
T

B

S
R
N

E
L (DIN)
U (DIN)

W (DIN)
Platinel 2
PR20-40

W97Re3-W75Re25
JPt100

Pt100

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

-10 to 20mV
0 to 100mV

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

10

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.

Measurement accuracy

*1

Sampling period: 250 ms
Burnout detection:

Functions with a thermocouple (TC), RTD,
standard signal 0.4 to 2 V DC, and 1 to 5 V
DC.
Can be specified as upscale, downscale, and off.
For standard signal, judged as burnout at 0.1
V or less.

Input bias current: 0.05 µA (for TC/RTD b-terminal)
Measuring current(RTD): about 0.13mA
Input resistance:

1 MΩ or more for TC/mV input
About 1 MΩ for DC voltage input

Allowable signal source resistance:

250 Ω or less; effect of permissible signal
source resistance 0.1 µV/Ω or less for TC/mV
input
2 kΩ or less; effect of permissible signal
source resistance 0.01%/100 Ω or less for
DC voltage input

Allowable leadwire resistance:

Max. of 150 Ω/wire (resistance in each of
three wires must be equal) for RTD input
However, 10 Ω/wire for a maximum range of

-150.0 to 150.0°C.
Effect of permmisible leadwire resistance
±0.1°C/10Ω or less

All Rights Reserved. Copyright © 2000, Yokogawa Electric Corporation GS 05D01D02-02E 3rd Edition Jul. 30, 2004-00

<<Contents>> <<Index>>

6

Allowable input voltage:

±10 V DC for TC/mV/RTD input
±20 V DC for DC voltage input

Noise rejection ratio:

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

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, or DIN (ITS-90) for TC

and RTD

24V DC Loop Power Supply for Sensor

The controller supplies power to a two-wire transmitter.
Place a resistor (10 to 250Ω)between the controller and the
transmitter, convert a current signal to a voltage signal, and
read it from the PV input.

21.6 to 28.0V DC, maximum supply current is about 30mA
(only for models with 24V DC loop power supply).

Ambient temperature should be 0 to 40°C when using 24V
DC loop power supply for UT320.

■

24 V DC Power Supply Wiring to Two-wire Sensor

250Ω

12

PV input

1 to 5 V DC signal

13

21

Loop power

28.0 V DC

22

supply

21.6 to

External
resistor
(Note)

Two-wire transmitter

4-20mADC

Note: Connecting a 250 Ω resistor to the terminals is optional.
Model: X010-250-2 (resistor with M3.5 crimp-on terminal lugs)

Retransmission Output

Either PV, target setpoint, or control output is output. Either
the retransmission output or the 15V DC loop power supply
can be used.

Number of output points: 1
Output signal: 4 to 20 mA DC
Load resistance: 600 Ω or less
Output accuracy: ±0.3% of span

* Performance in the standard operating

conditions (at 23± 2°C, 55± 10% RH, and 50/
60 Hz power frequency)

15V DC loop power supply:
Supply voltage is 14.5 to 18.0 V DC. Maximum supply

current is about 21 mA (with a protection circuit for a
field short-circuit).

Control Outputs

The control output is of a universal scheme and can be
selected from the following types of outputs. In the case of
heating/cooling control, it is also selectable from these
outputs. However, if the cooling side output is a relay
contact output, the alarm-3 cannot be used, and similarly if
the cooling side output is a voltage pulse or current output,
the retransmission output/15V DC sensor power supply
cannot be used.

Current output

Number of output points: 1 or 2 (2 for heating/cooling),

Output signal: 4 to 20 mA
Load resistance: 600 Ω or less

Swiched between voltage pulse output and
current output.

Output accuracy: ±0.3% of span

Performance in the standard operating
conditions (at 23± 2°C, 55± 10% RH, and
50/60 Hz power frequency)

Voltage pulse output

Number of output points: 1 or 2 (2 for heating/cooling type),

Swiched between voltage pulse output and
current output.

Output signal:

On voltage = 12 V DC or more (load
resistance of 600Ω or more; current on
short-circuiting about 30 mA)
Off voltage = 0.1 V DC or less

Resolution: 10 ms

Relay contact output

Number of output points: 1 or 2 (2 for heating/cooling type)
Output signal:

Three terminals for NC, NO, and Common
transfer-contact

Contact rating:

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

Resolution: 10 ms

Contact Inputs

Usage:

Target setpoint selection, Auto/Man mode
switching, or Key lock parameter display/non-

display switching
Number of input points: 2
Input type: Non-voltage contact input or transistor open

collector input
Input contact rating: 12 V DC, 10 mA or more (for non-

voltage contact input)
On/off determination:

For non-voltage contact input,

ON= contact resistance of 1 kΩ or less,
OFF= contact resistance of 20 kΩ or more.

For transistor contact input,

ON= 2 V or less,
OFF= leakage current of 100 µA or less.

Minimum retention time for status detection: About 1

second

Contact Outputs

Usage: Alarm output, FAIL output, and others
Number of relay contact output points: 3
Relay contact rating: 240 V AC, 1 A or 30 V DC, 1 A

(COM terminals is common for every contact

output.)

● Display Specifications

PV display:

4-digit, 7-segment red LED; character height -

12 mm
Setpoint display:

4-digit, 7-segment red LED; character height -

9.3 mm

Status indicating lamps: LEDS

● Conformance to Safety and EMC Standards

Safety:Compliant with IEC/EN61010-1: 2001, approved

by CSA1010, approved by UL508.

Installation category : CAT. II (IEC/EN61010,

CSA1010) Pollution degree : 2 (IEC/

EN61010, CSA1010)

Measurement category : I (CAT. I : IEC/

EN61010)

Rated measurement input voltage : 10V DC

max.(across terminals), 300V AC max.(across

ground)

Rated transient overvoltage : 1500V (Note)

All Rights Reserved. Copyright © 2000, Yokogawa Electric Corporation

GS 05D01D02-02E 3rd Edition Jul. 30, 2004-00

<<Contents>> <<Index>>

7

Note : It is a value on the safety standard
which is assumed by IEC/EN61010-1 in
measurement category I, and is not the value
which guarantees an apparatus performance.

EMC standards:Complies with EN61326

During test, the controller continues to operate
with the measurement accuracy within ±20%
of the range.

● Construction, Mounting, and Wiring

Construction: Dust-proof and Drip-proof front panel

Material: ABS resin and polycarbonate
Case color: Black
Weight: Approx. 1 kg or less
External dimensions:

Mounting: Direct panel mounting; mounting bracket, one
Panel cutout dimensions:

Mounting attitude:

Wiring: M3.5 (ISO 3.5 mm) screw terminals (signal

conforming to IP55.
For side-by-side close installation, controller
loses its dust-proof and drip-proof protection.

48 (width) × 96 (height) × 100 (depth) mm
each for upper and lower mounting

45

+0.6

(width) ×

0

92

+0.8

0

(height) mm

Up to 30 degrees above the horizontal. No
downward tilting allowed.

wiring and power/ground wiring as well)

● Power Supply Specifications and Isolation

Power supply: Rated at 100 to 240 V AC (±10%), 50/60
Power consumption: MAX. 20 VA (MAX. 8.0W)

Internal fuse rating: 250 VAC, 16.A time-lug fuse
Memory back-up: Non-volatile memory (Service life

Withstanding voltage:

Primary terminals = Power and relay output terminals
Secondary terminals = Analog I/O signal terminals,

Isolation resistance:

Grounding:

Hz

approx. 1000,000 times of writings)
1500 V AC for 1 minute between primary and

secondary terminals
1500 V AC for 1 minute between primary and
ground terminals
1500 V AC for 1 minute between ground and
secondary terminals.
500V AC for 1minute between two secondary
terminals

voltage pulse output terminals,
contact input terminals

20 MΩ or more when 500 V DC voltage is
applied between the power terminals and
ground terminal.

Class D grounding (grounding resistance of
100 Ω or less)

● Isolation specifications

Measured input terminal:

15 V DC loop power supply terminals:

24V DC loop power supply terminals:

Control output (current or voltage pulse) and retransmis-

Isolated from other I/O terminals. Not
isolated from internal circuits.

Not isolated from 4-20mA analog output
and voltage pulse control output. Isolated
from other I/O terminals and internal circuit.

Isolated from other I/O terminals and
internal circuit.

sion terminals:
Not isolated between control output
terminals and retransmission output
terminal. Isolated from other I/O terminals
and internal circuits.

Relay contact control output terminals:

Isolated from other I/O terminals and
internal circuits.

Contact input terminals:

Not isolated from other contact input
terminals mutually, and communication
terminals. Isolated from other I/O terminals
and internal circuits.

Relay contact alarm output terminals:

Isolated from other I/O terminals and
internal circuits.

RS-485 communication terminals:

Not isolated from contact input terminals.
Isolated from other I/O terminals and
internal circuits.

Power terminals:

Isolated from other I/O terminals, ground
terminal, and internal circuits.

Ground terminal:

Isolated from other I/O terminals, power
terminals, and internal circuits.

● Environmental Conditions

Normal operating conditions:

Ambient temperature: 0 to 50°C (40°C or less for

Ambient temperature change limit:10°C/h or less
Ambient humidity: 20 to 90% RH (no condensing)
Magnetic field: 400 A/m or less
Continuous vibration (5 to 14 Hz):

Continuous vibration (14 to 150 Hz):
Short-period vibration: 14.7 m/s

Shock: 147 m/s
Installation altitude : 2,000 m or less above sea

Warm-up time 30 minutes or more

Transportation and storage conditions:

Temperature: -25 to 70°C
Temperature change limit:20°C/h or less
Humidity: 5 to 95% RH

Effect of operating conditions

Effect of ambient temperature:

For voltage or TC inputs:

For RTD inputs:

For analog output:

Effect of power supply fluctuation (within rated voltage

For analog input:

For analog output: ±0.05% of F.S./10 V or less

mounting of instruments side-by-side)
The operating ambient temperature range is
between 0°C and 40°C when the 24VDC
loop power supply.

Peak-to-peak amplitude of 1.2 mm or less

2

or less

4.9 m/s

2

or less, 11 ms

2

or less, 15 s

level

Whichever is greater, ±1 µV/°C or ±0.01%
of F.S./°C

±0.05°C/°C (ambient temperature) or less
for RTD input

±0.05% of F.S./°C
±0.05% of F.S./°C or less

range):

Equal to or less than whichever is greater,

± 1 µV/10 V or
± 0.01% of F.S./10 V

All Rights Reserved. Copyright © 2000, Yokogawa Electric Corporation GS 05D01D02-02E 3rd Edition Jul. 30, 2004-00

<<Contents>> <<Index>>

■Function Block Diagram for Standard Type

8

PV input
terminals

12 1311

, and

PV INPUT

Input selection

Unit selection

Input range conversion

Input bias

Input filter

Communication

terminals to

RS485

Control computationManual operation

A/M

2723

LOCALREMOTE

SP.NO=0 SP.NO=1 to 4

Target setpoint

ramp-rate function

AUTOMAN

AUTO (ON)/MAN (OFF) switching

Contact input

DI1 DI2

SP.NO

Target setpoints 1 to 4

Preset output Output limiter

STOP

RUN

*1

24 V loop

power supply

OT

Control

output

LPS

OUTPUT1 OUTPUT1

Terminals

21

22

and

Current or pulse

terminals

1716

and

terminals

, and

*1: If the setup parameter DIS (DI function selection) is set to “4”,

when the contact input 2 is ON (run state), that controller outputs the preset output value.

Terminal Parameter Function

Legend

Analog signal Contact signal Front panel key

Relay

2 31

15 V loop

power supply

terminals

Retransmission

OUTPUT2

/LPS

Current

1514

and

output

RET

Alarm function

DO3DO2DO1

Alarm 1 Alarm 2 Alarm 3

All Rights Reserved. Copyright © 2000, Yokogawa Electric Corporation

GS 05D01D02-02E 3rd Edition Jul. 30, 2004-00

<<Contents>> <<Index>>

■Function Block Diagram for Heating/Cooling Type

9

PV input
terminals

12 1311

, and

PV INPUT

terminals to

Input selection

Unit selection

Input range conversion

Input bias
Input filter

Communication

RS485

Control computationManual operation

A/M

2723

LOCALREMOTE

SP.NO=0

SP.NO=1 to 4

Target setpoint

ramp-rate function

AUTOMAN

AUTO (ON)/MAN (OFF) switching

Contact input

DI1 DI2

SP.NO

Target setpoints 1 to 4

Heating-side

preset output

OUTPUT1 OUTPUT1

Current or pulse

terminals

and

Heating/cooling

computation

Heating-side
output limiter

Cooling-side
output limiter

*1 *1

OT

Heating-side

OT

Cooling-side

output

OUTPUT2

1716

Relay

terminals

2 31

, and

Current or pulse

terminals

1514

and

*1: If the setup parameter DIS (DI function selection) is set to “4”,

when the contact input 2 is ON (run state), that controller outputs the preset output value.

output

DO3

Relay

Cooling-side
preset output

15 V loop

power supply

OUTPUT2

terminals
and

Retransmission

/LPS

Current

1514

output

RET

Alarm function

DO2DO1

Alarm 1 Alarm 2

Legend

Terminal Parameter Function
Analog signal Contact signal Front panel key

All Rights Reserved. Copyright © 2000, Yokogawa Electric Corporation GS 05D01D02-02E 3rd Edition Jul. 30, 2004-00

<<Contents>> <<Index>>

1

2

Relay contact output

3

Control output

NC

NO

COM

Contact rating: 250 V AC, 3 A

30 V DC, 3 A (resistance load)

Note: Select this option from

the OT parameter.

* Time proportional PID

relay contact output is

configured at factory

before shipment.

23

24

RS-485 communication

* Wiring can only be carried out

for controllers with

communication functions.

Maximum baud rate: 9600 bps

25

26

27

SDB(+)

SDA(-)

RDB(+)

RDA(-)

SG

* Wiring can only be carried

out for controllers with

24 V DC loop power supply.

8

9

Power supply

10

L

N

Allowable range: 100 to 240 V AC (

10%)

(free voltage)

50/60 Hz shared

Power supply

CAUTION

Before carrying out wiring, turn off the power

to the controller and check that cables to be

connected are not alive with a tester or the like

because there is a possibility of electric shock.

6

5

Alarm output

4

7

AL1

AL2

AL3

COM

Relay contact rating: 240 V AC, 1 A

30 V DC, 1 A (resistance load)

Relay

Alarm-1 output

Alarm-2 output

Alarm-3 output

Common

UT

16

17

Current/voltage

pulse output

4-20 mA DC,

voltage pulse

(12 V)

Control output

+

-

Note:Select this option

from the OT

parameter.

12

13

TC input

11

12

RTD input

13

12

13

mV/V input

A

b

B

-

+

-

+

12

13

Note: Connecting a 250

Ω resistor to the terminals is

optional.

Model: X010-250-2 (resistor with M3.5 crimp-on terminal

lugs)

*

When receiving 4-20 mA DC current signals,

set the PV input type to 1-5 V DC (setpoint

“41”).

䊏

Receiving 4-20 mA DC Current

Signals with the Controller

250 Ω

4-20mA

PV input

* Not configured at factory before shipment

See “2. Initial Settings,

” for more

information.

-

+

14

15

Retransmission output

4-20 mA DC

14

15

15 V DC loop power supply

14.5-18.0VDC

(21 mA DC max.)

* PV retransmission is configured at factory

before shipment.

Load resistance: 600

Ω or less

* If 15 V DC loop power supply is used,

retransmission output cannot be used.

-

+

-

+

* This wiring is only

possible for a controller

with a heater burnout

alarm.

29

28

Heater current

detection input

30

CT2

CT1

COM

CT

CT

OT=0 (factory-shipped setting)

Time proportional control

Relay output (terminals , and )

OT=1

Correspondence between parameter OT and control output types

Time proportional control

Voltage pulse output (terminals and )

OT=2

Current output

(terminals and )

OT=3

On-off control

Relay output (terminals , and )

* OT is a setup parameter. You can change the settings of the parameter OT to change the control output type.

See “2. Initial Settings,

” for more information.

1

2

3

16

17

16

17

1

2

3

When switching target

SP 1 to 4:

DI1

DI2

1.SP

2.SP3.SP

4.SP

OFF

OFFOFF

ON ON

ON

OFF

ON

Contact rating: 12 V DC, 10 mA or more

Correspondence between parameter DIS and external contact input functions

When DIS=4

DI1

DI2

COM

Common

When DIS=3

2.SP when DI1=ON

1.SP when DI1=OFF

STOP when DI2=ON

RUN when DI2=OFF

Common

When DIS=2

Hides the LOCK parameter when DI1=ON.

Shows the LOCK parameter when DI1=OFF.

Common

When DIS=1 (Factory-shipped setting)

2.SP when DI1=ON

1.SP when DI1=OFF

AUTO when DI2=ON

MAN when DI2=OFF

Common

When DIS=OFF

No function

No function

Common

DI1

DI2

COM

+5V

+5V

Contact

Transistor contact

*

DIS is a setup parameter.

Changing DIS setpoint allows you to change the function of external contact input.

No function

19

18

20

UT

19

18

20

1

2

3

4

5

6

7

8

9

10

21

22

23

24

25

26

27

28

29

30

11

12

13

14

15

16

17

18

19

20

24 V DC loop

power supply

21

22

21.6-28.0VDC

(30 mA DC max.)

-

+

Note: External Contact Input

If the power is turned on when the external contact input is OFF, the

mode (SP.NO or A/M) existing before the power is turned off will be

continued. (except for RUN/STOP)

10

■Standard Type, Terminal Arrangements

All Rights Reserved. Copyright © 2000, Yokogawa Electric Corporation

GS 05D01D02-02E 3rd Edition Jul. 30, 2004-00

<<Contents>> <<Index>>

Heating-side control output

1

2

3

NC

NO

COM

Relay contact output

* Time proportional PID relay contact

output is configured at factory

before shipment.

* Available if 4, 7 or 10 is set in the OT

(Control Output Type) setup parameter.

Contact rating: 250 V AC, 3 A

30 V DC, 3 A (resistance load)

23

24

25

26

27

SDB(+)

SDA(-)

RDB(+)

RDA(-)

SG

* Wiring can only be carried out

for controllers with communication

functions.

Maximum baud rate: 9600 bps

RS-485 communication

12

13

11

12

13

12

13

A

b

B

+

-

+

-

TC input

RTD input

mV/V input

12

13

*

When receiving 4-20 mA DC current signals,

set the PV input type to 1-5 V DC (setpoint

“41”).

䊏

Receiving 4-20 mA DC Current

Signals with the Controller

250 Ω

4-20mA

-

+

Note: Connecting a 250

Ω resistor to the terminals is

optional.

Model: X010-250-2 (resistor with M3.5 crimp-on terminal

lugs)

PV input

* Not configured at factory before shipment

14

15

14

15

+

-

+

-

Retransmission output

4-20 mA DC

15 V DC loop power supply

14.5-18.0VDC

(21 mA DC max.)

* PV retransmission is configured at factory before shipment.

* If 15 V DC loop power supply is used,

retransmission output cannot be used.

* The retransmission output and 15 V DC

loop power supply are not available

if the cooling-side control output is set to

“continuous output

” and “voltage pulse output.

”

Heating-side control output

16

17

Current/voltage

pulse output

4-20 mA DC,

voltage pulse

(12 V)

+

-

* Available if 5, 6, 8, 9,

11 or 12 is set in the OT

(Control Output Type)

setup parameter.

When switching target

SP 1 to 4:

DI1

DI2

1.SP

2.SP3.SP4.SP
OFF

OFFOFF

ON ON

ON

OFF

ON

Contact rating: 12 V DC, 10 mA or more

Correspondence between parameter DIS and external contact input functions

When DIS=4

DI1

DI2

COM

Common

When DIS=3

2.SP when DI1=ON

1.SP when DI1=OFF

STOP when DI2=ON

RUN when DI2=OFF

Common

When DIS=2

Hides the LOCK parameter when DI1=ON.

Shows the LOCK parameter when DI1=OFF.

Common

When DIS=1 (Factory-shipped setting)

2.SP when DI1=ON

1.SP when DI1=OFF

AUTO when DI2=ON

MAN when DI2=OFF

Common

When DIS=OFF

No function

No function

Common

DI1

DI2

COM

+5V

+5V

Contact

Transistor contact

*

DIS is a setup parameter.

Changing DIS setpoint allows you to change the function of external contact input.

No function

19

18

20

UT

19

18

20

Note: The cooling-side control output

is selected if 4, 5 or 6 is set in

the OT (Control Output

Type) setup parameter.

The alarm-3 output is not

available. The controller is

factory-set to the cooling-side

control output (time proportional

PID relay contact output).

8

9

10

L

N

CAUTION

Before carrying out wiring, turn off the power

to the controller and check that cables to be

connected are not alive with a tester or the like

because there is a possibility of electric shock.

Power supply

Power supply

Allowable range: 100 to 240 V AC (

10%)

(free voltage)

50/60 Hz shared

29

28

Heater current

detection input

30

CT2

CT1

COM

CT

CT

*

This wiring is only possible

for a controller with a

heater burnout alarm.

OT=4 (factory-shipped setting) OT=5

OT=6

* OT is a setup parameter.

You can change the settings of the parameter OT to change the control output type.

Heating side: Relay output

(terminals , and )

Cooling side: Relay output

(terminals and )

1

2

3

Heating side: Voltage pulse output

(terminals and )

Cooling side: Relay output

(terminals and )

16 17

Heating side: Current output

(terminals and )

Cooling side: Relay output

(terminals and )

16

17

Correspondence between parameter OT and heating-side/cooling-side output types

OT=7 OT=8 OT=9

Heating side: Relay output

(terminals , and )

Cooling side: Voltage pulse output

(terminals and )

1

2

3

Heating side: Voltage pulse output

(terminals and )

Cooling side: Voltage pulse output

(terminals and )

16

17

Heating side: Current output

(terminals and )

Cooling side: Voltage pulse output

(terminals and )

16 17

OT=10 OT=11 OT=12

The control output types,

“relay output

” and “voltage pulse output

” shown in the table above refer to those of time proportional control.

To change the type to a relay output for on-off control, select

“Relay Terminals

” and change the setpoint of the proportional band to

“0.”

Heating side: Relay output

(terminals , and )

Cooling side: Current output

(terminals and )

1

2

3

Heating side: Voltage pulse output

(terminals and )

Cooling side: Current output

(terminals and )

16 17

Heating side: Current output

(terminals and )

Cooling side: Current output

(terminals and )

16 17

12

13

14

15

100 

Two-wire transmitter

PV input

0.4 to 2.0 V DC signal

Loop power

supply

14.5 to

18.0 V DC

External

resistor

(Note)

Note: Connecting a 100

 resistor to the terminals is optional.

Model: X010-100-2 (resistor with M3.5 crimp-on terminal lugs)

15 V DC Power Supply Wiring to Two-wire Sensor

4-20 mA DC

12

13

21

22

250 

Two-wire transmitter

PV input

1 to 5 V DC signal

Loop power

supply

21.6 to

28.0 V DC

External

resistor

(Note)

Note: Connecting a 250

 resistor to the terminals is optional.

Model: X010-250-2 (resistor with M3.5 crimp-on terminal lugs)

24 V DC Power Supply Wiring to Two-wire Sensor

* Wiring can only be carried out for controllers with 24 V DC

loop power supply.

4-20 mA DC

1

2

3

4

5

6

7

8

9

10

21

22

23

24

25

26

27

28

29

30

11

12

13

14

15

16

17

18

19

20

6

5

4

7

AL1

AL2

AL3

COM

Relay

Alarm output/cooling-side control output

Alarm-1 output

Alarm-2 output

Alarm-3 output

or cooling-side control

output (Note)

Common

Relay contact rating: 240 V AC, 1 A

30 V DC, 1 A (

resistance

load)

UT

4

7

4

7

4

7

14 15

14 15

14

15

14 15

14 15

14

15

14

15

+

-

4-20 mA DC,

voltage pulse (12 V)

Cooling-side control output

Note: External Contact Input

If the power is turned on when the

external contact input is OFF, the

mode (SP.NO or A/M) existing before

the power is turned off will be

continued. (except for RUN/STOP)

11

■Heating/Cooling, Terminal Arrangements

All Rights Reserved. Copyright © 2000, Yokogawa Electric Corporation GS 05D01D02-02E 3rd Edition Jul. 30, 2004-00

<<Contents>> <<Index>>

■External Dimensions and Panel Cutout Dimensions

12

Unit: mm

10048 11

96

Small bracket

112

91.8

Small bracket

1 to 10 mm (Panel thickness)

General installation Side-by-side close installation

92

(53)

+0.8

70 min.

0

+0.8

92

145 min.

"N" stands for the number of controllers to be
installed.
However, the measured value applies if N  5.

0

[(N-1)48+45]

+0.6

0

+0.6

45

0

(25)

■Model and Suffix codes

Model Suffix Code Description

UT320

Type

Optional functions

-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)

0 None
1 With communication, heater burnout alarm
2 With heater burnout alarm

Standard accessories: Brackets (mounting hardware), Unit label, User’s manuals, and User’s Manual
(reference) (CD-ROM version)

■Items to be specified when ordering

Model and suffix codes, necessary/unnecessary of User’s Manual or QIC.

All Rights Reserved. Copyright © 2000, Yokogawa Electric Corporation

GS 05D01D02-02E 3rd Edition Jul. 30, 2004-00