Description
The ETLH is a weight transmitter with 4 independent weighing channels in a single device only 26 mm wide: every channel has its own load cells, its own A/D converter and its own reading, and the ETLH also shows the total weight. It replaces four separate transmitters and gives an analog weighing system the behaviour of a digital one: with one load cell per channel, every cell is monitored individually. The weight goes to the controller as an analog signal (mA / V) or via fieldbus or Industrial Ethernet. It is available in 13 versions, from analog and RS485 through CANopen, DeviceNet, CC-Link and Profibus DP to Modbus/TCP, EtherNet/IP, Profinet IO, EtherCAT, POWERLINK and SERCOS III; every version has RS485.
Each channel works with 24 bits, altogether at 4.8 kHz and 600 conversions per second. It connects up to 16 load cells of 350 Ω, up to 4 per channel, in 4- or 6-wire connection; the excitation supplies 5 VDC / 240 mA. The measuring range is ±39 mV, load cell sensitivity up to ±7 mV/V, linearity < 0.01 % FS and thermal drift < 0.0005 % FS/°C. The digital filter has 21 levels (5 … 600 readings/s). In addition there are 3 relay outputs (max. 115 VAC / 150 mA) and 2 opto-isolated PNP inputs (5 … 24 VDC). The ETLH Analog version has an opto-isolated 16-bit analog output: 0 … 20 / 4 … 20 mA (up to 300 Ω) or 0 … 10 / 0 … 5 / ±10 / ±5 V (min. 10 kΩ). Via RS485 the ETLH communicates using Modbus RTU, ASCII or continuous transmission.
The housing measures 26 × 115 × 120 mm and mounts behind the panel on an Omega/DIN rail or, with the fixing set supplied, in the panel front (cut-out 96 × 23 mm, front IP30); the Profibus DP version is not suitable for front mounting. It is powered with 12 … 24 VDC ±10 % at 5 W. It has a 6-digit red LED display (8 mm digit height), 6 status LEDs, 4 keys and removable screw terminals; it can also be configured with the free “Instrument Manager” PC software. The operating range is −20 … +60 °C. The ETLH is approved to OIML R76, class III, 3 × 10,000 e, plus OIML R61 / MID and UL recognition for the USA and Canada.
Versions
| Article number | Interface | Baud rate / type |
|---|---|---|
| ETLH Analog | RS485 + opto-isolated analog output | 0 … 20 / 4 … 20 mA · 0 … 10 / 0 … 5 / ±10 / ±5 V |
| ETLH485 | RS485 | up to 115,200 bit/s |
| ETLHCANOPEN | CANopen, slave | 10 … 1000 kbit/s |
| ETLHDEVICENET | DeviceNet, slave | 125, 250, 500 kbit/s |
| ETLHCCLINK | CC-Link, remote device station | 156 … 10,000 kbit/s |
| ETLHPROFI | Profibus DP, slave (not for front mounting) | up to 12 Mbit/s |
| ETLHMODBUSTCP | Modbus/TCP, slave | RJ45 10Base-T / 100Base-TX |
| ETLHETHETCP | Ethernet TCP/IP, web browser | RJ45 10Base-T / 100Base-TX |
| ETLHETHEIPN | 2× EtherNet/IP, adapter | RJ45 10Base-T / 100Base-TX |
| ETLHPROFINETION | 2× Profinet IO, device | RJ45 100Base-TX |
| ETLHETHERCAT | 2× EtherCAT, slave | RJ45 10Base-T / 100Base-TX |
| ETLHPOWERLINK | 2× POWERLINK, slave | RJ45 10Base-T / 100Base-TX |
| ETLHSERCOS | 2× SERCOS III, slave | RJ45 10Base-T / 100Base-TX |
Benefits at a glance
- 4 independent weighing channels in one device, plus total weight
- Up to 16 load cells (350 Ω), 4 per channel
- With one load cell per channel, every corner monitored individually
- 13 versions: analog, RS485, fieldbus or Industrial Ethernet
- 24 bits per channel, 600 conversions per second
- 3 relay outputs and 2 opto-isolated PNP inputs
- 16-bit analog output, mA or V, opto-isolated (ETLH Analog)
- Only 26 mm wide, for DIN rail or panel front
- Supply 12 … 24 VDC, 5 W
- OIML R76, class III, 3 × 10,000 e