UNI-T UT321 User Manual download pdf (Page 7)

<<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:

+0.6

(width) ×

+0.8

(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)

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 retransmis-

sion 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 communica-

tion 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/s

or less

Short-period vibration: 14.7 m/s

or less, 15 s

Shock: 147 m/s

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

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UNI-T UT321 User Manual Page 7

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