Weight Transmitter
WTB

The WTB is a highly accurate digital scale transmitter with 24-bit AD converter, which converts the output signals of the connected load cells in a stable weight value. This versatile and extremely reliable weight transmitter shows fast and accurate weight values. The transmitter has both analog and digital outputs that provide stable measurement information. Communication is done via an RS485 interface. Programmable relay outputs and two digital logic inputs are also available as standard.The optional analog output provides propotional to the weight an analog signal that can be processed by a PLC or PC.

This weighing transmitter, with the industry standards of bus technology, enables monitoring of various production processes and is a cost-effective alternative to comparable electronics from PLC manufacturers.

Optional: Modbus RTU, Modbus TCP, PROFIBUS DP, PROFINET IO, Ethernet IP, Ethernet TCP/IP, EtherCAT, DeviceNet, CANopen, POWERLINK, CC-Link, IO Link, Sercos III.

Features

• EC type-approval for maximum number of verification scale intervals: n = 10000 
• DIN rail mounting
• Wide input voltage range: 12 - 24V DC + / - 10%, + / - 10%
• Number of parallel load cells: max.8 (at 350 ohms)
• High measuring rate of the transmitter up to 300 measurements / sec
• A / D converter: 24 bit
• Six-digit display with red 7-segment LED's
• Maximum number of decimals: 4
• Programmable switching contacts
• 3 programmable potential free outputs: max. 115V AC / 60mA for control of relays
• Two digital, optically isolated inputs
• Interface: RS 485
• All connections via screw terminals
• Optional: Analog output, optically isolated, 16-bit (selectable 0-20mA, 4-20mA, 0-10V, 0 - 5V, ± 10V, ± 5V)
• Optional: Profibus-DP, RS 232

Construction

The WTB transmitter has a 6-digit weight and service display. The weight value can be controlled locally by the well-read, bright LED display. The four buttons are behind a hinged acrylic glass plate on the front. The scale transmitter is designed for installation on a standard DIN rail. The narrow design allows the installation of multiple devices next to each other. Both 4 - and 6-wire load cells can be connected. The peak value function (PEAK) can be linked with a switch point output of a serial interface, analog output, or display.

Weighing technology - Legal for trade

The scale transmitter of the WTB series are legal for trade according to OIML verification class III and IIII. The weighing function is authorized up to 10,000 components. The calibration and function setting is made easy via the keypad. A theoretical calibration - without weights - only by entering the weighing range and the nominal characteristic value of the load cell (mV / V) is also possible.

Interfaces

WTB 485	WTB analog	WTB Profibus
		GSD profibus Datei
Serial interface RS -485	Serial interface RS -485 Analogue output, opto-decoupled selectable: 0-20mA / 4-20mA (max 300ohm) / 0-10V / ± 10V / ± 5V (min 10kohm)	Serial interface RS -485 Slave Profibus DP (max 126 units with repeater)

WTB Profinet 2	WTB Ethernet 2	WTB Ethernet TCP/IP
XML Profinet - 2 Port - Datei	EDS EthernetIP Konfigurationsdatei
Serial interface RS -485 2 x Profinet IO; RJ45 10Base-T (10Mbps) or 100Base-TX (100Mbps)	Serial interface RS -485 Ethernet/IP; RJ45 10Base-T (10Mbps) or 100Base-TX (100Mbps)	Serial interface RS -485 Ethernet TCP/IP Slave über Webbrowser,  RJ45 10Base-T (10Mbps) oder 100Base-TX (100Mbps)

WTB EtherCAT 2	WTB Modbus	WTB CANopen
ESI EtherCAT Konfigurationsdatei		EDS CANopen Konfigurationsdatei
Serial interface RS -485 2 x Slave EtherCat port, RJ45 10Base-T (10Mbps) oder 100Base-TX (100Mbps)	Serial interface RS -485 Modbus/TCP; RJ45 10Base-T (10Mbps) or 100Base-TX (100Mbps)	Serial interface RS -485 Slave CANopen port, max 99 devices, Baud rate: 10, 20, 25, 50, 100, 125, 250, 500, 800, 1000 kbit/s

WTB POWERLINK 2	WTB CC-Link	WTB Sercos 2
	CSP CC-link Konfigurationsdatei
Serial interface RS -485 2 x Slave POWERLINK port, RJ45 10Base-T (10Mbps) oder 100Base-TX (100Mbps)	Serial interface RS -485 Slave CC-link port, max 64 Geräte, Baud rate: 156, 625, 2.500, 5.000, 10.000 kbit/s	Serial interface RS -485 2 x Slave SERCOS III port; RJ45 10Base-T (10Mbps) or 100Base-TX (100Mbps)

Technical data