IM 05D01D12-01E (1)
This manual describes installation, wiring, and other tasks required to make the controller ready for operation.
Contents
1. Safety Precautions
2. Model and Suffix Codes
3. How to Install
4. How to Connect Wires
5. Hardware Specifications
6. Terminal Wiring Diagrams
Introduction
Thank you for purchasing the UT351/UT321 digital indicating controllers.
The controller is shipped from the factory with 4 hardcopy user’s manuals (A2 and A3 size) and 1 user’s manual on CD-
ROM. The 4 user’s manuals in hardcopy format describe the operating procedures required for basic use. It is recommended
that you refer to these user’s manuals to understand [1] installation, [2] initial settings, and [3] operating procedures of the
controller.
The CD-ROM contains an User’s Manual (Reference) with descriptions of various functions and setting ranges that can be
set as necessary.
Moreover, the use of an optional parameter setting tool (model: LL100-E10) allows you to easily perform settings and
adjustments with a PC.
■
How to Use the Manuals
Purpose
Manual Title
Description
Media
Setup
Installation
Installation
Describes the tasks (installation, wiring, and others) required
to make the controller ready for operations.
A2-size paper,
back and front
Basic operation
Initial Settings
Describes examples of setting PV input types, control output
types, and alarm types. Making settings described herein
allows you to carry out basic control.
A2-size paper,
front
Operating
procedures
and troubleshooting
Operations
Describes key operation sequences. For operation control
through external contact inputs, see the back of
User’s Manual.
A2-size paper,
back
Brief operation
and setpoint recording
Parameters
Contains the parameter map used as a guideline for setting
parameters and lists of parameters for recording User Settings.
A2-size paper,
back and front
Basic operation of
Active Color PV Display
Setting / explanation
of Active Color PV Display
Describes the setting/explanation of Active Color PV Display.
A3-size paper,
back and front
Detailed description
of functions
User’s Manual
(Reference)
Describes functions more advanced than those explained in
the 3 hardcopy user’s manuals.
CD-ROM
1. Safety Precautions
The following symbol is indicated on the controller to ensure safe use.
CAUTION
This symbol on the controller indicates that the operator must refer to an explanation in the user’s manual in order
to avoid the risk of injury or death of personnel or damage to the instrument. The manual describes how the operator
should exercise special care to avoid electric shock or other dangers that may result in injury or loss of life.
The following symbols are used in the hardcopy user’s manuals and in the user’s manual supplied on the CD-ROM.
NOTE
Indicates that operating the hardware or software in a particular manner may damage it or result in a system failure.
IMPORTANT
Draws attention to information that is essential for understanding the operation and/or features of the controller.
2. Model and Suffix Codes
Before using the controller, check that the model and suffix codes match your order.
UT351
UT321
0
None
1
With communication, heater burnout alarm
Optional functions
2
With heater burnout alarm
-0
Standard type
-2
Heating/cooling type
-3
Standard type (with 24 V DC loop power supply)
Digital indicating controller (provided with retransmission output and 15 V
DC loop power supply as standard)
Model
Suffix Code
Description
Type
Check that the following items are provided:
• Digital indicating controller (of ordered model): ........................................... 1
• Brackets (mounting hardware): ...................................................................... 1 pair
• Unit label: ....................................................................................................... 1
• User’s Manuals: .............................................................................................. 3 (A2 size)
• User’s Manuals “Setting/Explanation of Active Color PV Display”: ............ 1 (A3 size)
• User’s Manual (Reference) (CD-ROM version): ........................................... 1
3. How to Install
NOTE
To install the controller, select a location where:
(1) no one may accidentally touch the terminals,
(2) mechanical vibrations are minimal,
(3) corrosive gas is minimal,
(4) temperature can be maintained at about 23
°
C and the fluctuation is minimal,
(5) no direct radiant heat is present,
(6) no magnetic disturbances are caused,
(7) no wind blows against the terminal board (reference junction compensation
element),
(8) no water is splashed,
(9) no flammable materials are around,
Never place the controller directly on flammable items or equipment.
If the controller has to be installed close to flammable items or equipment, be sure to provide shielding panels all
around the controller, at least 150mm away from every side; the panels should be made of either 1.43mm-thick
metal-plated steel plates or 1.6mm-thick uncoated steel plates.
NOTE
Never touch the opening at the bottom of the case. It is to be used in the factory at shipping.
●
Installation Position
Install the controller at an angle within 30
°
from horizontal
with the front panel facing upward. Do not install it facing
downward. The position of right and left sides should be hori-
zontal.
■
External Dimensions and Panel Cutout Dimensions
(25)
(53)
[(N-1)
96+92]
117 min.
145 min.
+0.8
0
+0.8
0
92
+0.8
0
92
+0.8
0
92
"N" stands for the number of controllers to be
installed.
However, the measured value applies if N
5.
100
11
UT351
Small bracket
Large bracket
91.8
112
Unit: mm
96
96
1 to 10 mm (Panel thickness)
General installation
Side-by-side close installation
[(N-1)
48+45]
+0.6
0
+0.8
0
92
"N" stands for the number of controllers to be
installed.
However, the measured value applies if N
5.
100
48
11
UT321
Small bracket
Small bracket
91.8
96
112
Unit: mm
45
+0.6
0
(25)
(53)
145 min.
+0.8
0
92
70 min.
1 to 10 mm (Panel thickness)
General installation
Side-by-side close installation
■
How to Install
CAUTION
Turn off the power to the controller before installing it on the panel because there is a possibility of electric shock.
After opening the mounting hole on the
panel, follow the procedures below to in-
stall the controller:
1.
Insert the controller into the opening
from the front of the panel so that the
terminal board on the rear is at the far
side.
2.
Set the brackets in place on the top and
bottom of the controller as shown in the
figure on the left, then tighten the screws
of the brackets. Take care not to over-
tighten them.
4. How to Connect Wires
CAUTION
1)
Before carrying out wiring, turn off the power to the controller and check that the cables to be connected are not
alive with a tester or the like because there is a possibility of electric shock.
2)
Wiring must be carried out by personnel who have basic electrical knowledge and practical experience.
NOTE
1)
Provide power from a single-phase instrument power supply. If there is a lot of noise in the power line, insert an
insulating transformer into the primary side of the line and use a line filter (recommended part: ZAC2205-00U
from TDK) on the secondary side.
As a countermeasures against noise, do not place the primary and secondary power cables close to each other.
2)
For thermocouple input, use shielded compensating lead wires for wiring. For RTD input, use shielded wires
that have low conductor resistance and cause no significant differences in resistance between the three wires.
The cables to be used for wiring, terminal specifications, and recommended parts are as shown below.
3)
Control output relays may be replaced. However, because they have a life of 100,000 times that of the resis-
tance load, use auxiliary relays to turn on/off a load.
4)
The use of inductance (L) loads such as auxiliary relays, motors and solenoid valves causes malfunction or
relay failure; always insert a CR filter for use with alternating current or a diode for use with direct current, as
a spark-removal surge suppression circuit, into the line in parallel with the load.
5)
When there is possibility of being struck by external lightening surge, use the arrester to protect the instrument.
■
For DC Relay Wiring
■
For AC Relay Wiring
R
UT351/UT321
UT’s contact
Diode
(Mount it directly
to the relay coil
terminal (socket).)
External DC power supply
Relay
(Use one with a relay coil rating
less than the UT’s contact rating.)
R
UT351/UT321
UT’s contact
CR filter
(Mount it directly
to the relay coil
terminal (socket).)
External AC power supply
Relay
(Use one with a relay coil
rating less than the UT’s
contact rating.)
●
Cable Specifications and Recommended Cables
Purpose
Name and Manufacturer
Power supply, grounding, relay contact outputs
600 V PVC insulated wires, JIS C 3307, 0.9 to 2.0 mm
2
Thermocouple
Shielded compensating lead wires, JIS C 1610, X- - -
(See Yokogawa Electric's GS 6B1U1-E.)
RTD
Shielded wires (three conductors), UL2482 (Hitachi Cable)
Other signals
Shielded wires
●
Recommended Terminal Lugs
3 . 7 m m
7 mm or less
3 . 7 m m
7 mm or less
or
0.3 to 1.65 mm
2
0.8 N·m or less
Applicable wire size
Tightening torque
●
Terminal Covers (Optional parts)
Target Model
Part Number
Sales Unit
For UT351
T9115YD
1
For UT321
T9115YE
1
5. Hardware Specifications
PV Input Signals
• Number of inputs: 1 (terminals
11
-
12
-
13
)
• Input type: Universal input system. The input type can be
selected with the software.
• Sampling period: 250 ms
• Burnout detection: Functions at TC, RTD, standard signal
(0.4 to 2 V or 1 to 5 V)
Upscale, downscale, and off can be specified.
For standard signal, burnout is determined to have occurred
if it is 0.1 V or less.
• Input bias current: 0.05
A (for TC or RTD b-terminal)
• Measurement current (RTD): About 0.13 mA
• Input resistance: 1 M
or more for thermocouple or mV input
About 1 M
for DC voltage input
• Allowable signal source resistance: 250
or less for
thermocouple or mV input
Effects of signal source resistance: 0.1
V/
or less
2 k
or less for DC voltage input
Effects of signal source resistance: About 0.01%/100
• Allowable wiring resistance: for RTD input
Maximum 150
/wire: Conductor resistance between three
wires should be equal
However, 10
/wire for a maximum range of -150.0 to
150.0
C.
Wire resistance effect:
0.1
C /10
• Allowable input voltage:
10 V DC for thermocouple, mV, or
RTD input
20 V DC for DC voltage input
• Noise rejection ratio: 40 dB (50/60 Hz) or more in normal mode
120 dB (50/60 Hz) or more in common mode
• Reference junction compensation error:
1.0
C (15 to 35
C)
1.5
C (0 to 15
C, 35 to 50
C)
• Applicable standards: JIS, IEC, DIN (ITS-90) for thermocouples
and RTD
Loop Power Supply
Supplies power to a two-wire transmitter.
(15 V DC: terminals
14
-
15
; 24 V DC: terminals
21
-
22
)
A resistor (10 to 250
) connected between the controller
and transmitter converts a current signal into a voltage
signal, which is then read via the PV input terminal.
Supply voltage: 14.5 to 18.0 V DC, max. 21 mA (provided
with a protection circuit against a field short-circuit); 21.6
to 28.0 V DC, max. 30 mA (only for models with 24 V DC
loop power supply)
When using the 24 V DC loop power supply of the UT321,
keep the operating ambient temperature between 0
C and
40
C.
Retransmission Output
Either PV, target setpoint, or control output is output.
Either the retransmission output or the loop power supply
can be used with terminals
14
-
15
.
• Number of outputs: 1 (terminals
14
-
15
)
• Output signal: 4-20 mA DC
• Load resistance: 600
or less
• Output accuracy:
0.3% of span under standard operating
conditions (23
2
C, 55
10% RH, power frequency of
50/60 Hz)
Control Output
Universal output system, The output type can be selected
with the software.
• Current output (Standard type: terminals
16
-
17
; Heating side:
terminals
16
-
17
; Cooling side: terminals
14
-
15
)
Number of outputs
1 or 2 (two for heating/cooling type),
switched between a voltage pulse output
and current output.
Output signal
4-20 mA DC
Load resistance
600
or less
Output accuracy
0.3% of span under standard operating
conditions (23
2
C, 55
10% RH,
power frequency of 50/60 Hz)
• Voltage pulse output (Standard type: terminals
16
-
17
; Heating
side: terminals
16
-
17
; Cooling side: terminals
14
-
15
)
Number of
outputs
1 or 2 (two for heating/cooling type),
switched between a voltage pulse output and current output.
Output signal
On-voltage = 12 V or more (load resistance: 600
or more)
Off-voltage = 0.1 V DC or less
Resolution
10 ms
• Relay contact output (Standard type: terminals
1
-
2
-
3
; Heating
side: terminals
1
-
2
-
3
; Cooling side: terminals
4
-
7
)
Number of outputs
1 or 2 (two for heating/cooling type)
Output signal
Three terminals (NC, NO, and common) /
Two terminals
Contact rating
Terminals - - :
250 V AC or 30 V DC, 3 A (resistance load)
Terminals - :
240 V AC or 30 V DC, 1A (resistance load)
Resolution
10 ms
1
2
3
4
7
Contact Inputs
• Purpose: Selection between target setpoints or Auto/Man modes,
or for other purposes
• Number of inputs: 2
•
Input type: Non-voltage contact or transistor open collector input
• Input contact rating: 12 V DC, 10 mA or more
• On/off determination: For non-voltage contact input, contact
resistance of 1 k
or less is determined as “on” and contact
resistance of 20 k
or more as “off.”
For transistor open collector input, input voltage of 2 V or
less is determined as “on” and leakage current must not
exceed 100
A when “off.”
• Minimum status detection hold time: About 1 second.
Contact Outputs
• Purpose: Alarm output, FAIL output, and others
• Number of outputs: 3
• Relay contact rating: 240 V AC/1 A or 30 V DC/1 A ; 1a (COM
terminal is common), (FAIL output ; 1b)
Display Specifications
• PV display:
UT351: 4-digit, 7-segment green or red LED display,
character height of 20 mm
UT321: 4-digit, 7-segment green or red LED display,
character height of 12 mm
• Setpoint display: 4-digit, 7-segment red LED display, character
height of 9.3 mm (for both UT351 and UT321)
• Status indicating lamps: LEDs
150mm
150mm
150mm
150mm
Front panel
of controller
Must not
exceed 30
30
Rear of
controller
Large bracket
(top mounting hardware)
Terminal board
Small bracket
(bottom mounting hardware)
Panel
Insert a screwdriver into the
brackets to tighten the screws.
Direction to insert the
controller
Insert the controller
into the opening at
the front of the panel.
User’s
Manual
IM 05D01D12-01E
Models UT351 / UT321
Digital Indicating Controllers
with Active Color PV Display
User’s Manual
Installation
3rd Edition: Apr. 1, 2003
Fold the cover in the direction
of the arrow.
Fit the cover hold
over the protrusion
on the mounting bracket.
Figure A
Figure B
1. Before attaching the terminal cover, bend the side with
the groove inward as shown in Fig. A. Be careful not to
bend it backwards. This not only marks it harder to
attach the cover but will also weaken its hold.
2. Fit the holes on the top and bottom of the terminal cover
the projections on the brackets (Fig. B) and lock in
place. The figure right shows the attachment of a
terminal cover to UT controller.
Safety and EMC Standards
• Safety: Compliant with IEC1010-1: 1990 and EN61010-1:
1993+A2:1995
Approved by CSA1010
CSA1010 installation category (overvoltage category) :
CATII (IEC1010-1)
Approved by UL508
(UT321:Application for certification made)
• EMC standards: Complies with EN61326.
The instrument continues to operate at a measuring
accuracy of within
20% of the range during tests.
(UT321:To be obtained)
Construction, Installation, and Wiring
• Construction: Only the front panel is dust-proof and drip-proof
(protection class IP55)
For side-by-side close installation the controller loses its
dust-proof and drip-proof protection.
• Material: ABS resin and polycarbonate
• Case color: Black
• Weight: About 1 kg or less
• Dimensions:
UT351
96 (W)
96 (H)
100 (depth from panel face)
mm
UT321
48 (W)
96 (H)
100 (depth from panel face)
mm
• Installation: Panel-mounting type. With top and bottom
mounting hardware (1 each)
• Panel cutout dimensions:
UT351
92
+0.8
0
(W)
92
+0.8
0
(H) mm
UT321
45
+0.6
0
(W)
92
+0.8
0
(H) mm
• Installation position: Up to 30
°
upward facing
(not designed for facing downward)
• Wiring: M3.5 screw terminals (for signal wiring and power/
ground wiring as well)
Power Supply Specifications
• Power supply: Rated voltage of 100 to 240 V AC (
10%), 50/60 Hz
• Power consumption: Max. 20 VA (8.0 W max.)
• Internal fuse rating: 250 V AC, 1.6A time-lug fuse
• Data backup: Non-volatile memory (can be written to up to
100,000 times)
• Withstanding voltage
- Between primary terminals* and secondary terminals**:
At least 1500 V AC for 1 minute (Note)
- Between primary terminals* and grounding terminal:
At least 1500 V AC for 1 minute (Note)
- Between grounding terminal and secondary terminals**:
At least 1500 V AC for 1 minute
- Between secondary terminals**:
At least 500 V AC for 1 minute
* Primary terminals indicate power terminals and relay
output terminals
** Secondary terminals indicate analog I/O signal, voltage
pulse output, and contact input terminals
Note: The withstanding voltage is specified as 2300 V AC
per minute to provide a margin of safety.
• Insulation resistance: 20 M
or more at 500 V DC between
power terminals and grounding terminal
• Grounding: Class 3 grounding (grounding resistance of 100
or less)
Signal Isolations
• PV input terminals: Isolated from other input/output terminals.
Not isolated from the internal circuit.
• 15 V DC loop power supply terminals: Not isolated from 4-20
mA analog output and voltage pulse control output. Isolated
from other input/output terminals and internal circuit.
• 24 V DC loop power supply terminals: Isolated from the 15 V
DC loop power supply terminals, 4-20 mA analog output
terminals and voltage pulse control output terminals, other
I/O terminals and the internal circuitry.
• 4-20 mA analog output terminals (for control output and
retransmission): Not isolated between 4-20 mA outputs nor
from 15 V DC loop power supply and voltage pulse control
output. Isolated from other input/output terminals and
internal circuit.
• Voltage pulse control output terminals: Not isolated from 4-20
mA outputs and 15 V DC loop power supply. Isolated from
other input/output terminals and internal circuit.
• Relay contact control output terminals: Isolated between contact
output terminals and from other input/output terminals and
internal circuit.
• Contact input terminals: Not isolated between contact input
terminals and from communication terminals. Isolated from
other input/output terminals and internal circuit.
• Relay contact alarm output terminals: Not isolated between
relay contact alarm outputs. Isolated from other input/
output terminals and internal circuit.
• RS-485 communication terminals: Not isolated from contact
input terminals. Isolated from other input/output terminals
and internal circuit.
• Power terminals: Isolated from other input/output terminals and
internal circuit.
• Grounding terminals: Isolated from other input/output terminals
and internal circuit.
Environmental Conditions
• Normal operating conditions:
Ambient temperature: 0 to 50
C (40
C or less for side-by-side
close installation)
When using the 24 V DC loop power supply of the UT321,
keep the operating ambient temperature between 0
C and
40
C.
Temperature change rate: 10
C/h or less
Ambient humidity: 20 to 90% RH (no condensation allowed)
Magnetic field: 400 A/m or less
Continuous vibration at 5 to 14 Hz: Full amplitude of 1.2 mm or
less
Continuous vibration at 14 to 150 Hz: 4.9 m/s
2
or less
Short-period vibration: 14.7 m/s
2
, 15 seconds or less
Shock: 147 m/s
2
or less, 11 ms
Installation height: Height above sea level of 2000 m or less
Warm-up time: 30 minutes or more after power on
• Transportation and storage conditions:
Temperature: -25 to 70
C
Temperature change rate: 20
C/h or less
Humidity: 5 to 95% RH (no condensation allowed)
• Effects of changes in operating conditions
- Effects from changes in ambient temperature:
- On voltage or thermocouple input,
1
V/
C or
0.01%
of F.S./
C, whichever is larger
- On RTD input,
0.05
C /
C (ambient temperature) or less
- On analog output,
0.05% of F.S./
C or less
- Effects from power supply fluctuation (within rated voltage
range)
- On analog input,
1
V/10 V or
0.01% of F.S./10 V,
whichever is larger
- On analog output,
0.05% of F.S./ 10 V or less
