<<Contents>> <<Index>>
General
Specifications
Model UT321
Digital Indicating Controller
with Active Color PV Display
GS 05D01D12-02E
■ General
Model UT321 Digital Indicating Controller is a precision 1/8
DIN controller, provided with the PV display color changing
function "Active Color PV Display." It has a large display
for readings, universal input/output and excellent monitoring
operability with the Auto/Man switching key. In addition,
auto tuning, the overshoot suppressing function “SUPER”,
the hunting suppressing function “SUPER2” and heating/
cooling control are available as control functions, and a retransmission output and 15 V DC loop power supply are also
equipped as standard. A communication function or 24 V DC
loop power supply is available optionally. As described
above, the UT321 is a controller provided with higher functions and capability.
UT321
Indication
in green or
red color
UT321E
“E” indicates the
model with expanded
functions.
■ Main Features
• Extra-large digital dispaly allows the indicated values to be
read even from a long distance. LEDs of 12 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 or deviation
becomes large. The color also can be fixed in green or red.
• Universal input and output allow simple setting of the input
type (thermocouple, RTD or mV), PV input range, and type
of control output (4 to 20 mA current, voltage pulse, or relay
contact) from the front panel.
• Parameters can easily be set using a personal computer.
("Parameter setting tool (model LL100)" sold separately is
required.)
• Various communication functions are provided. Communication is possible with personal computer, programmable
logic controller, and other controllers.
■ Functional Specifications
●
Reference point method:
The PV 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.
Reference point = PV input range (0%) Reference point 1 Reference point 2 PV input range (100%)
Reference point hysteresis = Fixed to 0.5% of the
PV input range span.
Reference deviation method:
PID parameters (No. 4 PID) are selected
when the deviation exceeds the reference
deviation. This methods takes precedence
over the reference point method.
Reference deviation = OFF or 0.1 to 100.0% of PV
input range span
PV input range (100%)
Reference deviation
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.
No.3PID
Reference deviation
Reference point 2
No.2PID
Reference point 1
No.1PID
PV input range (0%)
Measured value (PV)
Auto-tuning:
Available as standard. If auto-tuning is
operated, PID constants are automatically set
(limit cycle method).
“SUPER” function:
Overshoots generated by abrupt changes in the
target setpoint or by disturbances can be
suppressed.
GS 05D01D12-02E
©Copyright Apr. 2003
4th Edition Mar. 2005
2
<<Contents>> <<Index>>
“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.
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 6000 s, or OFF (manual reset)
Derivative time = 1 to 6000 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 PV input
range span (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 PV input range span
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; reverse
for the heating-side output, direct for the
cooling- side output.
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 Timeproportional PID control (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
PV input computation:
Bias addition (–100.0 to 100.0% of PV input
range span), 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 show/
hide 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 show/hide
switching cannot be used together.
All Rights Reserved. Copyright © 2003, Yokogawa Electric Corporation
If key lock parameter show/hide switching is used, target
setpoint selection and Auto/Man mode
switching cannot be used.
● Alarm Functions
Twenty-four 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, De-energized on
deviation high limit, De-energized on
deviation low limit, Deviation high and low
limits, High and low limits within deviation,
De-energized on PV high limit, De-energized
on PV low limit, SP high limit, SP low limit,
Output high limit, Output low limit, Deviation
high limit for target setpoint, Deviation low
limit for target setpoint, De-energized on
deviation high limit alarm for target setpoint,
De-energized on deviation low limit alarm for
target setpoint, Deviation high and low limits
fot target setpoint, Deviation within high and
low limits for target setpoint, Heater burnout
alarm, Sensor grounding alarm, Fault
diagnostic alarm, and FAIL output.
Alarm output:
3 points. Any three points among the above
alarms can be output as contact outputs . 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 PV input range
Deviation alarm:
–100.0 to 100.0% of PV input range span
Output alarm:
–5.0 to 105.0% of output range
Alarm hysteresis:
0.0 to 100.0% of PV input range span
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 burnout alarm (optional):
Two circuits incorporated.
A heater burnout alarm is output if the heater
current consumption is the burnout detection
value or less. This alarm can be used for
Relay ON/OFF control or time-proportional
PID control.
Heater current setting range: 0.0 to 50.0 A
Heater current measuring accuracy: ±5% of span ± 1
digit
Heater current detecting resolution: 0.5 A
Time required until burnout detection is on: 0.13 s
minimum
Burnout sensor model: CTL-6-S-H (URD Co. Ltd.)
Burnout sensor is provided separately.
GS 05D01D12-02E
4th Edition Mar. 01, 2005-00
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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 band) and
control being in stable condition, the sensor is
judged to be in a grounding condition.
* Moving average refers to the average value for output
values sampled (five times) in every cycle time.
High- and low-limit setting range of on/off rate:
–5.0 to 105.0% of output range
Detection band of on/off rate:
0.0 to 100.0% of PV input range span
Fault diagnostic alarm:
Input burnout, A/D conversion error,
thermocouple RJC error
FAIL output: Abnormality in software or hardware.
When in Fail status, control output, retransmission output and alarm output become 0%
or OFF.
● Display and Operation Functions
PV display: 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 indication:
Alarm indicator lamp
3 lamps: AL1, AL2 and AL3
Setpoint number indicator lamp:
3 lamps: SP2, SP3 and SP4 (not lit when SP1
is selected)
MAN operation mode lamp: MAN (lit in MAN mode)
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.
SP deviation mode :
Within the preset SP deviation : green,
Out of the preset SP deviation : red
Setting of within the preset SP deviation :
red, Out of the preset SP deviation : green is
possible.
Deviation band is changeable using a
parameter. The setting of either high limit
deviation or low limit deviation is also
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:
쑶 and 쑴 keys:
Increase or decrease setpoints and various
parameters.
SET/ENT key:
Sets setpoint data, calls or selects various
parameters.
A/M key: Switches operation mode (Auto/Man)
SELECT display:
Allows selection and registration of frequently
changed parameters from the operating
parameters during operation.
For example, if the alarm-1 setpoint is
registered in the SELECT display, the setpoint
can easily be displayed during operation.
Security function:
Operation can be inhibited by a password.
LED display unit (for PV)
Status lamps
Indicate alarm status (AL1, 2, 3), manual operation
(MAN), setpoint No. (SP2, 3, 4) in use.
Communication port for light loader
Parameters are set via communication
from a personal computer.
Operation keys
Displays PV and error codes when
errors are detected.
Active color PV display
Indication in green or red color.
LED display unit (for SP)
Displays setpoints (SP), output values,
or setting items/values of parameters.
Increase/decrease the setting data (쑶,쑴).
Select parameter/Enter the setting data (SET/ENT).
Select Auto/Manual operation mode (A/M).
All Rights Reserved. Copyright © 2003, Yokogawa Electric Corporation
GS 05D01D12-02E
4th Edition Mar. 01, 2005-00
4
<<Contents>> <<Index>>
● Communication Functions (Optional Function )
The communication function, provided with the instrument,
allows connection to a personal computer, programmable
logic controller, and other controllers.
Communication protocol
Computer link communication:
Communication protocol with a personal
computer.
Ladder communication:
Communication protocol with programmable logic controllers.
MODBUS communication:
Communication protocol with a personal
computer or PLC.
Coordinated operation:
Communication protocol for coordinated
operation with two or more GREEN series
controllers. The UT321 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 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 halfduplex, start-stop synchronization, nonprocedural
Communication rate:
600, 1200, 2400, 4800, or 9600 bps
Examples of Communication System Configuration Diagram
(1) Computer link communication/MODBUS communication
(2) Ladder communication
Personal computer
PLC
UT351/UT321
Digital indicating controller
UT351/UT321
Digital indicating controller
(3) Coordinated operation
UP351 Program controller
or UT351/UT321 Digital indicating controller
UT351/UT321
Digital indicating controller
All Rights Reserved. Copyright © 2003, Yokogawa Electric Corporation
GS 05D01D12-02E
4th Edition Mar. 01, 2005-00
5
<<Contents>> <<Index>>
■ Hardware Specifications
PV Input Signal
Number of input points: 1
Input system:
The type of input and instrument range can be
specified using the table of PV input shown
below by key operation or communication.
Sampling period: 250 ms
Input type, instrument range and measurement accuracy:
Refer to the table below.
Input type
Input range
code
Instrument range (˚C)
OFF
K
1
-200 to 1370C
-300 to 2500F
2
3
-199.9 to 999.9C
-199.9 to 500.0C
0 to 2300F
-199.9 to 999.9F
J
T
4
-199.9 to 999.9C
-300 to 2300F
5
6
-199.9 to 400.0C
0.0 to 400.0C
-300 to 750F
-199.9 to 750.0F
B
7
0 to 1800C
32 to 3300F
Thermocouple
Measurement accuracy*1
Instrument range (˚F)
Unspecified(when shipped from the factry)
Set the data item PV input Type"IN" to the OFF option to leave the PV input type undefined.
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
S
8
0 to 1700C
32 to 3100F
R
9
0 to 1700C
32 to 3100F
N
10
-200 to 1300C
-300 to 2400F
0.15% of instrument range 1 digit
0.1% of instrument range 1 digit
0.25% of instrument range 1 digit for
E
L (DIN)
11
12
-199.9 to 999.9C
-199.9 to 900.0C
-300 to 1800F
-300 to 1300F
U (DIN)
W (DIN)
13
14
15
-199.9 to 400.0C
0.0 to 400.0C
0 to 2300C
-300 to 750F
-199.9 to 750.0F
32 to 4200F
Platinel 2
PR20-40
16
17
0 to 1390C
0 to 1900C
32 to 2500F
32 to 3400F
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
RTD
W97Re3-W75Re25
JPt100
Pt100
Standard
signal
DC voltage
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
18
30
0 to 2000C
-199.9 to 500.0C
32 to 3600F
-199.9 to 999.9F
31
35
36
37
40
41
50
51
55
56
-150.0 to 150.0C
-199.9 to 850.0C
-199.9 to 500.0C
-150.0 to 150.0C
-199.9 to 300.0F
-300 to 1560F
-199.9 to 999.9F
-199.9 to 300.0F
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
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
0.2% 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.
Note 1: The accuracy is 0.3C of instrument range 1 digit for a temperature range from 0 to 100C.
Note 2: The accuracy is 0.5C of instrument range 1 digit for a temperature range from -100 to 0C and 100 to 200C.
*1: Performance in the standard operating conditon (at 23C 2C, 5510%RH, and 50/60Hz power frequency)
*2: To receive a 4 to 20 mA DC signal, select a Standard signal of 1 to 5 V DC and connect it to a 250 Ω resistor.
This resistor is optional Model: X010-250-2 (resistor with M3.5 crimp-on-terminal lugs)
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 and RTD b-terminal
Measurement current(RTD): About 0.13 mA
All Rights Reserved. Copyright © 2003, Yokogawa Electric Corporation
Input resistance:
1 MΩ or more for TC or mV input
About 1 MΩ for DC voltage input
Allowable signal source resistance:
250 Ω or less for TC or mV input
Effects of signal source resistance:
0.1 µV/Ω or less
2 kΩ or less for DC voltage input
Effects of signal source resistance:
About 0.01%/100 Ω
GS 05D01D12-02E
4th Edition Mar. 01, 2005-00
6
<<Contents>> <<Index>>
Allowable wiring resistance:
Max. 150 Ω/wire (resistance in each of three
wires must be equal) for RTD input
However, max. 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 (50/60 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
24 V DC Loop Power Supply for Sensor
Supplies power to a two-wire transmitter.
A resistor (10 to 250Ω) connected between the controller and
the transmitter converts a current signal into a voltage signal,
which is then read by the PV input terminal.
Supply voltage: 21.6 to 28.0 V DC
Maximum supply current : 30 mA (only for models with
24 V DC loop power supply)
Ambient temperature should be 0 to 40°C when using 24
V DC loop power supply for UT321.
■ 24 V DC Power Supply Wiring to Two-wire Sensor
Current output
Number of output points:
1 or 2 (2 for heating/cooling type)
Selected between voltage pulse output.
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)
Voltage pulse output
Number of output points:
1 or 2 (2 for heating/cooling type)
Selected between current output.
Output signal:
On voltage = 12 V DC or more (load
resistance; 600 Ω or more, current at shortcircuit; 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:
At three terminals of 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
12
External
resistor 250Ω
(Note)
Two-wire transmitter
PV input
1 to 5 V DC signal
13
21
4-20 mADC
22
Loop power
supply
21.6 to
28.0 V DC
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
Any of PV, target setpoint, or control output is output. Can
also be used for 15 V DC loop power supply.
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)
When used for 15 V DC loop power supply:
Supply voltage: 14.5 to 18.0 V DC
Maximum supply current : About 21 mA
(with the protection circuit at 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 (15 V DC loop power supply)
cannot be used.
All Rights Reserved. Copyright © 2003, Yokogawa Electric Corporation
Usage:
Target setpoint selection, Auto/Man mode
switching, or Key lock parameter show/hide
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 detection:
For non-voltage contact input,
ON= contact resistance; 1 kΩ or less,
OFF= contact resistance; 20 kΩ or more.
For transistor open collector input,
ON= 2 V or less,
OFF= leakage current; 100 µA or less.
Minimum retention time for status detection:
About 1 s
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
a-contact (COM terminals are common for
every contact output.) (b-contact for FAIL
output)
● Display Unit Specifications
PV display: 4-digit, 7-segment green/red LED; each digit
12 mm in height
Setpoint display:
4-digit, 7-segment red LED; each digit 9.3
mm in height
Status indicator lamps: LEDs
GS 05D01D12-02E
4th Edition Mar. 01, 2005-00
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<<Contents>> <<Index>>
● Conformance to Safety and EMC Standards
Safety: Complies with IEC/EN61010-1 (CE), approved by
C22.2 No.61010-1, approved by UL508.
Installation category : CAT. II Pollution
degree: 2 (IEC/EN61010-1, C22.2 No.61010-1)
Measurement category : I (CAT. I : IEC/
EN61010-1)
Rated measurement input voltage : 10V DC
max.(across terminals), 300V AC max.(across
ground)
Rated transient overvoltage : 1500V (Note)
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, EN61000-3-2,
EN61000-3-3 and EN55011 (CE).
AS/NZS 2064 compliant (C-Tick).
Class A Group 1.
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
conforming to 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
External dimensions:
48 (W) × 96 (H) × 100 (depth from the panel
face) (mm)
Mounting: Direct panel mounting; mounting bracket, one
each for upper and lower mounting
Panel cutout dimensions:
+0.8
45 +0.6
0 (width) × 92 0 (height) mm
Mounting attitude:
Up to 30 degrees above the horizontal. No
downward tilting allowed.
Wiring:
M3.5 (ISO 3.5 mm) screw terminals (signal
wiring and power/ground wiring as well)
● Power Supply and Isolation Specifications
Power Supply Specifications
Power supply: Voltage rating at 100 to 240 V AC (±10%),
50/60 Hz
Power consumption: Max. 20 VA (Max. 8.0 W)
Internal fuse rating: 250 V AC, 1.6 A time-lug fuse
Memory back-up: Non-volatile memory (service life about
100,000 times of writings)
Withstanding voltage:
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
Primary terminals: Power supply and relay output
terminals
Secondary terminals: Analog input/output signal
terminals, voltage pulse output terminals,
and contact input terminals
Isolation resistance:
Between power supply and grounding
terminals, 500 V DC 20 MΩ or more
Grounding: Class D gronding (Class 3 grounding)
(grounding resistance of 100 Ω or less)
All Rights Reserved. Copyright © 2003, Yokogawa Electric Corporation
Isolation Specifications
PV input terminal:
Isolated from other input/output terminals.
Not isolated from internal circuits.
15 V DC loop power supply terminal:
Not isolated from 4-20mA analog output
and voltage pulse control output. Isolated
from other input/output terminals and
internal circuit.
24 V DC loop power supply terminal:
Isolated from other input/output terminals
and internal circuit.
Control output (current or voltage pulse) and retransmission terminal:
Not isolated between control output and
retransmission output terminals. Isolated
from other input/output terminals and
internal circuits.
Relay contact control output terminal:
Isolated from other input/output terminals
and internal circuits.
Contact input terminal:
Not isolated from other contact input
terminals mutually, and from communication terminals. Isolated from other input/
output terminals and internal circuits.
Relay contact alarm output terminal:
Isolated from other input/output terminals
and internal circuits.
RS-485 communication terminal:
Not isolated from contact input terminals.
Isolated from other input/output terminals
and internal circuits.
Power supply terminal:
Isolated from other input/output terminals,
grounding terminal, and internal circuits.
Grounding terminal:
Isolated from other input/output terminals,
power supply terminals, and internal
circuits.
● Environmental Conditions
Normal operating conditions:
Ambient temperature: 0 to 50°C (40°C or less when
mounted side by side)
The operating ambient temperature range is
between 0°C and 40°C when the 24 V DC
loop power supply.
Ambient temperature change limit: 10°C/h or less
Ambient humidity: 20 to 90% RH (no condensation)
Magnetic field: 400 A/m or less
Continuous vibration (5 to 14 Hz):
Peak-to-peak amplitude of 1.2 mm or less
Continuous vibration (14 to 150 Hz):
4.9 m/s2 or less
Short-period vibration: 14.7 m/s2 or less, 15 s
Shock:
147 m/s2 or less, 11 ms
Installation altitude: 2,000 m or less above sea level
Warm-up time: 30 minutes or more after power on
Transportation and storage conditions:
Temperature: –25 to 70°C
Temperature change limit: 20°C/h or less
Humidity: 5 to 95% RH (no condensation)
Effects of operating conditions
Effect of ambient temperature:
For voltage or TC input:
Equal to or less than whichever is greater,
±1 µV/°C or ±0.01% of F.S./°C.
For RTD inputs:
±0.05°C/°C (ambient temperature) or less
For analog output:
±0.05% of F.S./°C or less
Effect of power supply fluctuation (within rated voltage):
For analog input:
Equal to or less than whichever is greater,
± 1 µV/10 V or ± 0.01% of F.S./10 V.
For analog output:
±0.05% of F.S./10 V or less
GS 05D01D12-02E
4th Edition Mar. 01, 2005-00
8
<<Contents>> <<Index>>
■ Function Block Diagram for Standard Type
PV input
terminals
11 , 12 and 13
Communication
terminals 23 to 27
INPUT
RS-485
Contact input
(when parameter DIS=1)
DI1
DI2
Input selection
Unit selection
Input range conversion
Input bias
Input filter
SP.NO
Target setpoints 1 to 4
REMOTE
SP.NO=0
LOCAL
SP.NO=1 to 4
Target setpoint
ramp-rate function
Manual operation
Control computation
MAN
A/M
AUTO
AUTO (ON)/MAN (OFF) switching
Preset output
Output limiter
STOP
RUN
*1
24 V loop
power supply
15 V loop
power supply
OT
Retransmission
output
Control
output
LPS
OUTPUT1
Terminals
21 and 22
Current or pulse
terminals
16 and 17
OUTPUT1
Relay
terminals
1 , 2 and 3
Alarm function
RET
OUTPUT2
/RET
DO1
DO2
DO3
Alarm 1 Alarm 2 Alarm 3
Current
terminals
14 and 15
*1: If the setup parameter DIS (DI function selection) is set to “4”,
when the contact input 2 is ON (STOP state), that controller outputs the preset output value.
Terminal
Parameter
Function
Analog signal
Contact signal
Front panel key
Legend
All Rights Reserved. Copyright © 2003, Yokogawa Electric Corporation
GS 05D01D12-02E
4th Edition Mar. 01, 2005-00
9
<<Contents>> <<Index>>
■ Function Block Diagram for Heating/Cooling Type
PV input
terminals
11 , 12 and 13
Communication
terminals 23 to 27
INPUT
RS-485
Contact input
(when parameter DIS=1)
DI1
DI2
Input selection
Unit selection
Input range conversion
Input bias
Input filter
SP.NO
Target setpoints 1 to 4
REMOTE
SP.NO=0
LOCAL
SP.NO=1 to 4
Target setpoint
ramp-rate function
Manual operation
Control computation
MAN
A/M
AUTO
AUTO (ON)/MAN (OFF) switching
Heating/cooling
computation
Heating-side
preset output
Heating-side
output limiter
Cooling-side
output limiter
STOP
RUN
RUN
STOP
*1
*1
OT
15 V loop
power supply
OT
Heating-side
output
Cooling-side
preset output
Retransmission
output
Cooling-side
output
Alarm function
RET
DO3
OUTPUT1
Current or pulse
terminals
16 and 17
OUTPUT1
OUTPUT2
/RET
DO1
OUTPUT2
/RET
Relay
Relay
Current or pulse
terminals
terminals
1 , 2 and 3
14 and 15
DO2
Alarm 1 Alarm 2
Current
terminals
14 and 15 *2
*1: If the setup parameter DIS (DI function selection) is set to 4 ,
when the contact input 2 is ON (STOP state), that controller outputs the preset output value.
*2: Unavailable when cooling-side control output is current or pulse.
Terminal
Parameter
Function
Analog signal
Contact signal
Front panel key
Legend
All Rights Reserved. Copyright © 2003, Yokogawa Electric Corporation
GS 05D01D12-02E
4th Edition Mar. 01, 2005-00
2
3
NO
COM
All Rights Reserved. Copyright © 2003, Yokogawa Electric Corporation
10
9
8
CT
CT
30
28
29
COM
CT2
CT1
Heater current
detection input
29
30
9
10
27
28
8
7
25
26
5
6
13
20
19
18
17
16
15
14
17 -
16 +
4-20 mA DC,
voltage pulse
(12 V)
Control output
Current/voltage
pulse output
Note:Select this option
from the OT
parameter.
Common
No function
No function
Common
AUTO when DI2=ON
MAN when DI2=OFF
2.SP when DI1=ON
1.SP when DI1=OFF
GS 05D01D12-02E
OT=1
Time proportional control
Voltage pulse output (terminals 16 and 17 )
Time proportional control
Relay output (terminals 1 , 2 and 3 )
OT=2
Current output
(terminals 16 and 17 )
OT=3
DI1 OFF ON OFF ON
Common
DI2 OFF OFF ON ON
On-off control
Relay output (terminals 1 , 2 and 3 )
Common
No function
When DIS=2
When DIS=3
switching target
Hides the LOCK parameter when DI1=ON. When SP
1 to 4:
Shows the LOCK parameter when DI1=OFF.
1.SP2.SP3.SP 4.SP
Correspondence between parameter OT and control output types
OT=0 (factory-shipped setting)
13 -
12 +
TC input
4-20 mA DC
15 -
14 +
14.5-18.0VDC
(21 mA DC max.)
15 V DC loop power supply
15 -
14 +
Retransmission output
13 -
12 +
mV/V input
13 B
12 b
11 A
RTD input
Load resistance: 600 Ω or less
UT
+5V
COM
DI2
DI1
Contact rating: 12 V DC, 10 mA or more
COM 20
DI2 18
+5V
Transistor contact
20
18
19
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)
Common
STOP when DI2=ON
RUN when DI2=OFF
Contact
* If 15 V DC loop power supply is used,
retransmission output cannot be used.
2.SP when DI1=ON DI1
19
1.SP when DI1=OFF
When DIS=4
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)
13 -
12 +
set the PV input type to 1-5 V DC (setpoint “41”).
* When receiving 4-20 mA DC current signals,
䊏 Receiving 4-20 mA DC Current
Signals with the Controller
* PV retransmission is configured at factory
before shipment.
PV input * Not configured at factory before shipment.
Correspondence between parameter DIS and external contact input functions
When DIS=OFF When DIS=1 (Factory-shipped setting)
* OT is a setup parameter. You can change the settings of the parameter OT to change the control output type.
* This wiring is only
possible for a controller
with a heater burnout
alarm.
11
12
21.6-28.0VDC
(30 mA DC max.)
* DIS is a setup parameter.
Changing DIS setpoint allows you to change the function of external contact input.
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.
CAUTION
Allowable range: 100 to 240 V AC (10%)
(free voltage)
50/60 Hz shared
N
L
Power supply
Power supply
23
24
COM 7
Common
3
22
Relay contact rating: 240 V AC, 1 A
30 V DC, 1 A (resistance load)
Relay
4
21
1
2
AL3 4
Alarm-3 output
27
AL2 5
SG
RDA(-)
Alarm-2 output
26
AL1 6
UT
22 -
25 RDB(+)
Alarm-1 output
Alarm output
21 +
SDA(-)
24
Note: Select this option from
* Wiring can only be carried
the OT parameter.
out for controllers with
* Time proportional PID
24 V DC loop power supply.
relay contact output is RS-485 communication * Wiring can only be carried out
24 V DC loop
for controllers with
configured at factory
communication functions.
power supply
before shipment.
23 SDB(+)
Maximum baud rate: 9600 bps
Contact rating: 250 V AC, 3 A
30 V DC, 3 A (resistance load)
1
NC
Relay contact output
Control output
■ Terminal Arrangements for Standard Type
<<Contents>> <<Index>>
10
4th Edition Mar. 01, 2005-00
3
AL1 6
Relay
UT
All Rights Reserved. Copyright © 2003, Yokogawa Electric Corporation
10
9
8
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).
CT
CT
30
28
29
COM
CT2
CT1
Heater current
detection input
SDA(-)
23
24
25
3
4
5
30
29
9
10
27
28
7
8
26
22
6
21
1
SG
RDA(-)
2
27
26
25 RDB(+)
24
23 SDB(+)
11
20
19
18
17
16
15
14
13
12
17 -
Common
No function
No function
Common
AUTO when DI2=ON
MAN when DI2=OFF
2.SP when DI1=ON
1.SP when DI1=OFF
GS 05D01D12-02E
OT=11
Heating side: Voltage pulse output
(terminals 16 and 17 )
Cooling side: Current output
(terminals 14 and 15 )
OT=10
Heating side: Relay output
(terminals 1 , 2 and 3 )
Cooling side: Current output
(terminals 14 and 15 )
OT=6
Heating side: Current output
(terminals 16 and 17 )
Cooling side: Current output
(terminals 14 and 15 )
OT=12
Heating side: Current output
(terminals 16 and 17 )
Cooling side: Voltage pulse output
(terminals 14 and 15 )
OT=9
Heating side: Current output
(terminals 16 and 17 )
Cooling side: Relay output
(terminals 4 and 7 )
Common
No function
UT
Common
STOP when DI2=ON
RUN when DI2=OFF
4-20 mA DC
15
14
13
Loop power
supply
14.5 to
18.0 V DC
PV input
0.4 to 2.0 V DC signal
12
13 -
12 +
250 Ω 4-20mA
set the PV input type to 1-5 V DC (setpoint “41”).
Note: Connecting a 250 Ω resistor to the terminals is
optional.
Model: X010-250-2 (resistor with M3.5 crimp-on terminal
lugs)
14.5-18.0VDC
(21 mA DC max.)
COM
DI2
DI1
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)
22
21
13
12
Loop power
supply
21.6 to
28.0 V DC
PV input
1 to 5 V DC signal
Note: Connecting a 250 resistor to the terminals is optional.
Model: X010-250-2 (resistor with M3.5 crimp-on terminal lugs)
4-20 mA DC
Two-wire transmitter
External
resistor 250 (Note)
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.
20
18
19
Transistor contact
* The retransmission output and 15 V DC
loop power supply are not available
if the cooling-side control output is set to
“current output” and “voltage pulse output.”
* If 15 V DC loop power supply is used,
retransmission output cannot be used.
15 -
14 +
15 V DC loop power supply
Contact rating: 12 V DC, 10 mA or more
COM 20
DI2 18
+5V
+5V
4-20 mA DC,
voltage pulse (12 V)
Contact
15 -
14 +
Cooling-side control output
15 -
14 +
Retransmission output
Note: Connecting a 100 resistor to the terminals is optional.
Model: X010-100-2 (resistor with M3.5 crimp-on terminal lugs)
4-20 mA DC
Two-wire transmitter
External
resistor 100 (Note)
䊏 Receiving 4-20 mA DC Current
Signals with the Controller
* When receiving 4-20 mA DC current signals,
* PV retransmission is configured at factory before shipment.
13 -
12 +
mV/V input
13 B
12 b
2.SP when DI1=ON DI1
19
1.SP when DI1=OFF
When DIS=4
RTD input
11 A
15 V DC Power Supply Wiring to Two-wire Sensor
Common
DI2 OFF OFF ON ON
DI1 OFF ON OFF ON
When DIS=2
When DIS=3
switching target
Hides the LOCK parameter when DI1=ON. When SP
1 to 4:
Shows the LOCK parameter when DI1=OFF.
1.SP2.SP3.SP 4.SP
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.”
OT=8
Heating side: Voltage pulse output
(terminals 16 and 17 )
Cooling side: Voltage pulse output
(terminals 14 and 15 )
OT=7
Heating side: Relay output
(terminals 1 , 2 and 3 )
Cooling side: Relay output
(terminals 4 and 7 )
Heating side: Relay output
(terminals 1 , 2 and 3 )
Cooling side: Voltage pulse output
(terminals 14 and 15 )
OT=5
Heating side: Voltage pulse output
(terminals 16 and 17 )
Cooling side: Relay output
(terminals 4 and 7 )
OT=4 (factory-shipped setting)
Correspondence between parameter OT and heating-side/cooling-side output types
voltage pulse
(12 V)
Heating-side control output
* Available if 5, 6, 8, 9,
Current/voltage
11 or 12 is set in the OT
pulse output
(Control Output Type)
setup
parameter.
16 + 4-20 mA DC,
13 -
12 +
TC input
PV input * Not configured at factory before shipment.
Correspondence between parameter DIS and external contact input functions
When DIS=OFF When DIS=1 (Factory-shipped setting)
* OT is a setup parameter.
You can change the settings of the parameter OT to change the control output type.
* This wiring is only possible
for a controller with a
heater burnout alarm.
for controllers with communication
functions.
Maximum baud rate: 9600 bps
RS-485 communication * Wiring can only be carried out
* DIS is a setup parameter.
Changing DIS setpoint allows you to change the function of external contact input.
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.
CAUTION
Allowable range: 100 to 240 V AC (10%)
(free voltage)
50/60 Hz shared
N
L
Power supply
Power supply
Relay contact rating: 240 V AC, 1 A
30 V DC, 1 A (resistance load)
Alarm-2 output
AL2 5
Alarm-3 output
or cooling-side control AL3 4
output (Note)
COM 7
Common
Alarm-1 output
Alarm output/cooling-side control output
Contact rating: 250 V AC, 3 A
30 V DC, 3 A (resistance load)
COM
Heating-side control output
Relay contact output * Time proportional PID relay contact
output is configured at factory
NC
1
before shipment.
* Available if 4, 7 or 10 is set in the OT
NO
2
(Control Output Type) setup parameter.
■ Terminal Arrangements for Heating/Cooling Type
<<Contents>> <<Index>>
11
4th Edition Mar. 01, 2005-00
12
<<Contents>> <<Index>>
■ External Dimensions and Panel Cutout Dimensions
Unit: mm
Small bracket
100
96
112
11
91.8
48
Small bracket
1 to 10 mm (Panel thickness)
General installation
Side-by-side close installation
70 min.
+0.6
0
92
+0.8
0
[(N-1)48+45]
145 min.
(53)
92
"N" stands for the number of controllers to be
installed.
However, the measured value applies if N 5.
+0.8
0
45
+0.6
0
(25)
■ Model and Suffix Codes
Model
Suffix Code
UT321
Type
Optional functions
Description
Digital indicating controller (provided with retransmission output and 15 V
DC loop power supply as standard)
-0
-2
-3
Standard type
Heating/cooling type
Standard type (with 24 V DC loop power supply)
0
1
2
None
With communication, heater burnout alarm
With heater burnout alarm
Standard accessories: Brackets (mounting hardware), Unit label, User’s manuals, and User’s Manual
(reference) (CD-ROM version)
Terminal cover (optional part) is provided.
■ Items to be Specified when Ordering
Model and suffix codes, necessary/unnecessary of User’s Manual or QIC.
All Rights Reserved. Copyright © 2003, Yokogawa Electric Corporation
GS 05D01D12-02E
4th Edition Mar. 01, 2005-00