Toky DW9L 3 Series Operation Manual Download Page 9

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The instrument has a universal (AC/DC) power input interface. If no special explanation is given, it is a standard product of AC220V power interface. The limit working voltage
of the instrument is AC 85-265V. Please ensure that the supplied power is suitable for this series. Products to prevent damage to the product. Also recommended:

①

It is recommended to use AC power to install 1A fuse on the side of the line of fire

；

②

For areas with poor network quality, it is suggested that a surge suppressor be installed in the power circuit to prevent lightning strikes and a fast pulse train suppressor be

installed.

3.7 Power Supply

This meter with relay output function can be used for alarm indication and protection control output function in various occasions. When the digital output

is valid, the relay output is on, and when the digital output is off, the relay output is off.

①

High Alarm

When the high alarm indicates that the alarm threshold is higher than the alarm item, the relay switch output turns on.

②

Low Alarm

When the low alarm indicates that the alarm threshold is lower than the alarm item, the relay switch output turns on;

③

Remote control relay

If the relay output control is selected as the remote control mode, the output of the relay is set to “remote control” through the programming operation,

and the output of the relay can be controlled through communication.

3.8 Relay output

3.9 Switch Input

Meter

Inside

3.10 Analog output

3.11 Energy Pulse Output

The instrument has a switch input detection function and adopts the dry node signal input method. The instrument is equipped with a +24V working power

supply inside, and no external power supply is required. When it is connected externally, it is collected by the instrument switch input module DI, and the

interface shows that it is in the open state. When it is disconnected externally, it will be disconnected through the digital input module DI of the instrument

collector, and the interface will be in the open state.

The instrument has an analog output function and can be set by any of 26 power levels. The analog output of the instrument can be used to achieve the
analog output function of the electrical parameters (4-20mA).
Electrical parameters: output: 4-20mA, accuracy:±0.5%F.s
Overload: 120% effective output, maximum current 24mA

Load: Rmax = 600Ω

Energy metering and pulse output: the meter provides positive and negative active energy metering, 2 loops energy pulse output functions and RS485 digital interface to
complete the display and remote transmission of energy data. The energy pulse (resistance signal) of the photocoupler relay with open-collector level is used to realize the
remote transmission of active energy (forward) and reactive energy (forward), and the remote computer terminal, PLC and DI switch acquisition module is used to collect the
instrument. The total number of pulses to achieve energy cumulative measurement. Use the pulse output method to check the accuracy of the electrical energy (national
measurement procedures: comparison method of pulse error of the standard form)

。

①

Electrical characteristics: VCC<=48V IZ<=50mA in the circuit diagram of the pulse acquisition interface

②

Pulse constant: 9000 imp/kWh(kvarh),the fastest pulse speed does not exceed 200mS. Its significance is: when the meter accumulates 1kWh (1kvarh) output pulse

number is 9000.

L(+)

AC:85

～

265V

working

power

DC:100

～

240V

N(-)

Opened