Weight Transmitter WTQ

Weighing Transmitter WTQ

The WTQ is a digital weighing transmitter with a 24-bit A/D converter. It converts the output signals of the connected load cells into a stable weight value. This versatile and extremely reliable weight transmitter for connecting 4 load cells directly (16 load cells in parallel).
The transmitter has both analog and digital outputs, which provide stable measurement information. Communication takes place via an RS-485 interface. Programmable relay outputs and two digital logic inputs are also available as standard. The optional analog output provides an analog signal proportional to the weight, which can be processed by a PLC or a PC.
The WTQ Ethernet2 has two equivalent RJ 45 ports, which are connected as mini-switches. This allows several devices to be connected in a network without an external switch, saving space. One patch cable is sufficient between each device.

Fieldbus transmitter

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

The variety of available fieldbus interfaces allows easy and safe integration of weighing systems to any automation system. As an option, the industrial measuring amplifier with PLC interfaces and fieldbuses Modbus RTU, Modbus TCP, PROFIBUS DP, PROFINET IO, Ethernet IP, Ethernet TCP/IP, EtherCAT, DeviceNet, CANopen, POWERLINK, CC-Link, IO Link, Sercos III.

    

Features of the weighing transmitter

• Digital weighing transmitter with PLC interfaces.
• Space-saving top-hat rail mounting or control cabinet front installation (cut-out 23x96 mm, panel thickness 2.5mm).
• Wide input voltage range: 12 - 24V DC + / - 10%, + / - 10%
• Direct connection of up to 4 load cells saves a junction box
• High measuring rate of the transmitter up to 600 measurements / sec
• Digital 600Hz filter for even faster measurement results
• 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

Option

•     Selectable analog output for current or voltage, optically isolated, 16 bit
•     (selectable 0-20mA, 4-20mA, 0-10V, 0- 5V, ±10V, ±5V)
•     Various bus systems: Profibus DP, ProfiNet, Ethernet/ModbusTCP and others

Functions

•     Theoretical calibration with input of cell values possible
•     Linearized calibration with 5 points possible
•     Indication of the percentage of the weight on each load cell
•     Different weight filters selectable
•     Peak function (PEAK) can be linked to a switch point output of a serial interface, analog output, or display.
•     Event history: storage of the last 50 events: Calibrations, zero settings, errors, equalizations.
•     Alarm relay: the outputs can be configured to switch in case of alarm.

Advantage of the WTQ weighing transmitter

The biggest advantage of the weighing transmitter is the possibility of direct connection of 4 load cells. No cable box is required. In addition, the direct connection of the load cells offers diagnostic possibilities
- Measurement and monitoring of the load distribution (e.g. in a silo scale to monitor the pile formation)
- Zero diagnosis (if the weighing system is completely descaled)
- Digital equalization of strain gauge load cell signals (individually)

Faster cycle times provide faster and more accurate measurement results. (600 measurement queries / second)

Construction

The WTQ transmitter has a 6-digit weight and service display. The easy-to-read, bright LED display allows the weight value to be checked directly on site.
The four operating keys can be reached behind a hinged acrylic glass plate at the front.
4 load cells can be directly connected to the removable screw and terminal strip. A junction box is not necessary. Both 4- and 6-wire load cells can be connected.
The transmitter is designed for mounting on the standard top hat rail. The narrow design allows the installation of several devices next to each other. Panel mounting is also possible (mounting kit included in delivery).

Weighing technology - Legal for trade

The WTQ series weighing transmitters are legal for trade according to OIML calibration class III and IIII. The weighing function is approved with up to 10,000 parts.
Calibration and function setting is easily done via the keypad.
There are 3 types of calibration available:
A Theoretical Calibration - without weights - here the load cell range (mV/V) is entered directly.
For a linear calibration, 5 load points are available.
And a classical two-point calibration - zero point and nominal load point.

Technical data

Versions

Typ		Interface
WTQ RS485		Serial interface RS-485, up to 32 can be connected in the bus
WTQ Analog 16Bit		Serial 16 bit interface RS-485, up to 32 can be connected in the bus Analogue output, opto-decoupled selectable: 0-20mA / 4-20mA (max 300ohm) / 0-10V / ± 10V / ± 5V (min 10kohm)
WTQ Profibus DP		Slave Profibus DP with serial interface RS-485 Baud rate: up to 12 Mbit/s
WTQ Profinet IO 2x		2 x Profinet IO with serial interface RS-485 Transmission rate: RJ45 10Base-T (10Mbps) or 100Base-TX (100Mbps)
WTQ Modbus/TCP		Slave Modbus/TCP with serial interface RS-485 RJ45 10Base-T (10Mbps) or 100Base-TX (100Mbps)
WTQ Ethernet TCP/IP		Ethernet TCP/IP with serial interface RS-485 Slave accessible via web browser RJ45 10Base-T (10Mbps) or 100Base-TX (100Mbps)
WTQ Ethernet IP 2x		2 x Ethernet TCP/IP with serial interface RS-485 works as adapter in Ethernet/IP network RJ45 10Base-T (10Mbps) or 100Base-TX (100Mbps)
WTQ CANopen		Slave CANopen-Anschluss mit serieller Schnittstelle RS-485 Baudrate: 10, 20, 25, 50, 100, 125, 250, 500, 800, 1000 kbit/s
WTQ POWELINK 2x		2 x Slave POWERLINK port with serial interface RS-485 RJ45 10Base-T (10Mbps) or 100Base-TX (100Mbps)
WTQ EtherCat 2x		2 x slave EtherCAT port with serial interface RS-485 RJ45 10Base-T (10Mbps) or 100Base-TX (100Mbps)

WTQ 485	WTQ analog	WTQ Profibus
		GSD profibus file
Serial interface RS -485	Serial interface RS -485 Analog 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 devices with repeater)
	WTQ Profinet 2	WTQ Ethernet
	XML Profinet - 2 Port - file	EDS EthernetIP configuration file
	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)
WTQ EtherCAT	WTQ Modbus	WTQ CANopen
ESI EtherCAT configuration file		EDS CANopen configuration file
Serial interface RS -485 Slave EtherCat port	Serial interface RS -485 Modbus/TCP; RJ45 10Base-T (10Mbps) or 100Base-TX (100Mbps)	Serial interface RS -485 Slave CANopen port, max 99 devices
WTQ Ethernet POWERLINK	WTQ CC-Link	WTQ Sercos
	CSP CC-link configuration file
Serial interface RS -485 Slave POWERLINK port	Serial interface RS -485 Slave CC-link port, max 64 devices	Serial interface RS -485 Slave SERCOS III port