Yokogawa UT350L Data sheet

<<Contents>> <<Index>>

General Specifications

Model UT350L Limit Controller

GS 05D01D21-01E

■Overview

The UT350L is an FM approved limit controller that can be configured either as a high limit or as a low limit controller by a user.

The UT350L features universal input, two alarm outputs, retransmission output, a timer to count the total time the setpoint is exceeded, and a register to retain the maximum temperature reached.

The RS485 communication interface is available optionally.

■Features

• The large LED display of measured value whose character is 20mm in height allows the good readability.

• Universal input is provided. The input type can be set and changed easily by software.

• Retransmission function is included in the standard features.

UT350L

■Function Specifications

Limit Control Function

Setpoint : 1 Control type : high limit or low limit Limit action : latching

When measured value (PV) exceeds the setpoint(SP), both the “Exceeded” lamp and “OUT” lamp turn on.(1) “Exceeded” lamp turns off when PV goes into normal status, however, “OUT” lamp remains lit.(2) “OUT” lamp turns off when the confirmation is done with pressing the “RESEST” key by the operator.(3) The confirmation(RESET) is not allowed while PV exceeds SP.(4)

■State of Output Relay

State of output relay is de-energized whenever OUT lamp is lit. When PV has not exceeded SP since power-on, state of output relay is de-energized. (NC terminal : CLOSE, NO terminal : OPEN) and after confirmation is done, the state of output relay is energized. (NC terminal : OPEN, NO terminal : CLOSE) It is also possible to make the relay energized immediately after power-on by the software setting. At power-off, the relay is de-energized (NC terminal : CLOSE, NO terminal : OPEN).

Control parameter setting range:

ON/OFF hysteresis band : 0.0 to 100.0 of instrument range width.

Resrart mode:

Relay status at power-on can be selected.

EXCEEDED

Lamp

OUT

Lamp

EXCEEDED

Lamp

OUT

Lamp

power off

power on

not over temp

(Settable as off, either)

(not accepted)

243

confir-

mation

confirmation

(not accepted)

confirmationconfirmation

lit

off

lit

off

confir-

mation

lit

off

lit

off

GS 05D01D21-01E

4th Edition Apr. 2007 (KP)

<<Contents>> <<Index>>

● Signal Computation Function

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:

Limit output confirmation

● Alarm Function

Types of alarm functions are provided. The alarm status is indicated by the alarm lamp on the front panel. Also, two 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, Deviation within high and low limits, De-energized on PV high limit,

De-energized on PV low limit. Alarm output: 2 points. Setting ranges for PV alarm and deviation alarm:

PV alarm: -100.0 to 100.0% of measured input range Deviation alarm: -100.0 to 100.0% of measured input

range span

Alarm hysteresis width: 0.0 to 100.0% of measured

input range span

Waiting action:

Waiting action can be set to make PV/deviation alarm

stand-by during start-up until PV reaches the normal

region. 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, retransmission output and alarm output become 0% or OFF.

● Display and Operation Function

PV display:

In 4-digit digital display of engineering unit

Setpoint display:

Various data, such as the setpoint (SP), are displayed by selection on the 4-digit digital display.

Status indicating lamps:

2 alarm indicator lamps: AL1, AL2

Exceeded lamp: Lit when PV exceeds SP

Output status lamp: Lit when output relay is de-

energized.

Operation keys:

▲ and ▼ keys: Increase or decrease setpoints and

various parameters.

SET/ENT key: For data setting or call-up/selection of

various parameters.

RESET key: Confirms the limit status and resets the

output.

Security function:

An operation-inhibiting mode using a password is

provided.

■Communication Specifications (op-

tional)

This controller has a communication function and can be connected to a personal computer, programmable controllers or other GREEN Series controllers. Communication protocol:

Computer link communication: Communication protocol

with a personal computer.

Ladder communication: Communication protocol with

programmable controller.

Communication interface:

Communication protocol: Computer link or ladder

communication 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

■Hardware Specifications

● PV Input Signal

Number of input points : 1 Input system:

The types of input/measurement ranges can be set

using software from a list of inputs. Types of inputs, measurement ranges and measurement accuracy: Refer to the table on page 4. Burnout detection:

Functions with a thermocouple (TC), RTD, standard signal 0.4 to 2 V, and 1 to 5 V. 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) Input resistance:

1 MΩ or more for TC/mV 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

2 k Ω or less; effect of permissible signal source

resistance 0.01%/100 Ω or less for DC voltage

Allowable leadwire resistance:

Max. of 150 Ω/wire (resistance in each of three wires

must be equal) for RTD.

However, 10 Ω/wire in the range of -150.0 to 150.0°C. Effect of permissibe leadwire resistance:

0.1°C/10 Ω or less

Allowable input voltage:

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

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 for TC and RTD Response time: 2 second or less, 63% (10 - 90%)

(The time required for transmission output to reach 63% of the maximum excursion when PV abruptly changes from 10% to 90%)

GS 05D01D21-01E 4th Edition Apr. 02, 2007-00

<<Contents>> <<Index>>

Retransmission Output

Either PV or target setpoint is output.

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

Control Output

The control output is a relay output.

Number of output points : 1 Output signal: Three terminals for NC, NO, and

Common transfer-contacts

Contact rating: 250 V AC, 3 A or 30 V DC, 3A (resistive

load)

Resolution: 10 ms

Contact Input

Usage: Confirmation of limit output Number of input points: 1 Input type: Voltage-free contact input or transistor contact

input Input contact rating: 12 V DC, 10 mA or more On/off determination:

For 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: 1 s

Contact Output

Usage: Alarm output and FAIL output Number of relay contact output points: 2 Relay contact rating: 240 V AC, 1 A or 30 V DC, 1 A

● Display Specifications

PV display: 4-digit, 7-segment red LED; character height -

20 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: Complies with IEC/EN61010-1 (CE), approved by

C22.2 No.61010-1, approved by UL508. Certified for FM-3810 and FM-3545. 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). 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: Front panel drip-proof (IP55 compatible) Material: ABS resin and polycarbonate Case color: Black Weight: Approx. 1 kg or less External dimensions: 96 (width) x 96 (height) x 100

Mounting: Direct panel mounting; mounting bracket, one

Panel cutout dimensions:

Mounting attitude: Up to 30 degrees above the horizontal.

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

(depth) mm

each for upper and lower mounting

+0.8

(width) x

+0.8

No downward tilting allowed.

and power/ground wiring as well)

(height)

Status lamps

Alarm(AL1, 2), EXCEEDED, OUT

LED display unit (for PV)

Displays PV, and error code when error is detected.

LED display unit (for SP)

Displays setpoint (SP) and setting item/value of parameters.

Operational keys

Increase/Decrease the setting data (▲,▼ ) Select parameter/Enter the setting data (SET/ENT) Confirm and reset the output (RESET)

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