UNI-T UT321 Manual do Utilizador descarregar pdf (Página 9)

<<Contents>> <<Index>>

■ Function Block Diagram for Heating/Cooling Type

DI1 DI2

Contact input

(when parameter DIS=1)

SP.NO

Target setpoints 1 to 4

SP.NO=0

LOCALREMOTE

Control computationManual operation

AUTO (ON)/MAN (OFF) switching

AUTOMAN

STOP RUN RUN STOP

A/M

*1 *1

DO3

DO2DO1

Alarm 1 Alarm 2

Relay

PV input

terminals

, and

12 1311

INPUT

Input selection

Unit selection

Input range conversion

Input bias

Input filter

Communication

terminals to

RS-485

2723

Heating/cooling

computation

Heating-side

preset output

Heating-side

output limiter

Cooling-side

preset output

Cooling-side

output limiter

Heating-side

output

OUTPUT1 OUTPUT1

1716

Current or pulse

terminals

and

Relay

terminals

, and

2 31

OUTPUT2

/RET

Current or pulse

terminals

and

1514

Cooling-side

output

RET

15 V loop

power supply

Retransmission

output

Current

terminals

and

1514

Alarm function

SP.NO=1 to 4

Target setpoint

ramp-rate function

OUTPUT2

/RET

*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

1 2 3 4 5 6 7 8 9 10 11 12

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UNI-T UT321 Manual do Utilizador Página 9

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