Embedded DC ammeter with 91 * 44 openings

The PZ96B series single-phase meter adopts AC sampling technology and can directly or indirectly measure voltage, current, etc. in single-phase power grids. It can be used for local display and can also be connected to industrial control equipment to form a measurement and control system.

The instrument may have an RS-485 communication interface and use Modbus RTU protocol; Can be equipped with analog output, relay alarm output, and switch input/output. According to different requirements, parameters such as transformation ratio, alarm, and communication can be set and controlled through the dashboard buttons.

1、 Technical parameters

2、 External dimensions

3、 Wiring method

4、 Precautions

5.1 Voltage Input

The input voltage should not exceed 120% of the rated input voltage of the product, otherwise PT should be considered;

A 1A fuse must be installed at the voltage input terminal;

5.2 Current input

The current input must be connected using an external CT.

Ensure that the input current and voltage phase sequence are consistent when wiring, otherwise display values and symbols may be incorrect; At the same time, ensure that the current input and output lines are connected correctly (with the marked * terminal connected to the input line);

If other instruments are connected to the CT used, the wiring should be connected in series;

When installing wiring, it is recommended to use a wiring harness instead of directly connecting to a CT for ease of disassembly and assembly;

Before removing the current input connection of the product, the CT primary circuit must be cut off or the secondary circuit must be short circuited.

DC current input should use an external shunt or DC transmitter

5.3 Communication Wiring

This instrument provides asynchronous half duplex RS485 communication interface, using MODBUS-RTU protocol, and various data information can be transmitted on the communication line. In theory, up to 128 instruments can be connected simultaneously on a single line, and each instrument can set its communication address (Addr), and the communication rate (buad) can also be selected through settings.

It is recommended to use three core shielded wires with a diameter of not less than 0.5mm2 for communication connections, connected to A, B, and COM respectively. The shielding layer should be grounded. When wiring, the communication wires should be kept away from strong electrical cables or other strong electric field environments.

Suggest adding a matching resistor between A and B of the end instrument, with a resistance range of 120 Ω to 10k Ω.

Embedded DC ammeter with 91 * 44 openings

Embedded DC ammeter with 91 * 44 openings