Laumas TLM8 8-channel weight transmitter

Product positioning and appearance

TLM8 is an 8-channel independent weight transmitter launched by Laumas, which can convert multiple analog weighing sensors into industrial digital signals and support centralized collection and total weight display on multiple scales.

Installation: Backboard installation, Omega/DIN rail, optional junction box

Size: 148 × 92 × 60 mm

Display: 128 × 64 pixel backlit graphic LCD

Operation: 5-key keyboard, pluggable screw terminals

Material: Standard PC; optional AISI 304 stainless steel (IP68), sanitary type (IP69K)

Input/output and communication interface

1. Signal input

8-channel sensor dedicated input

Support 4/6-wire sensors

Up to 16 350 Ω sensors can be connected in parallel at most

Sensor power supply: 5VDC/240mA

Measurement range: ± 39mV

Support sensor sensitivity: ± 7mV/V

2. Digital IO

Type parameter

Relay output 5 channels, maximum 115VAC/150mA

3 digital inputs, optocoupler isolated PNP, 5~24VDC

3. Analog output (standard TLM8)

16 bits (65535 divisions)

Current: 0~20mA/4~20mA (maximum 400 Ω)

Voltage: 0~5V/0~10V (minimum 2k Ω)

4. Communication interface

RS485：Modbus RTU、ASCII、 Continuous transmission

Baud rate: 2400~115200 bps

Supports almost all mainstream fieldbuses:

Modbus TCP、CANopen、DeviceNet、CC-Link、Profibus DP、EtherCAT、Profinet IO、EtherNet/IP、Powerlink、SERCOS III

Core technical parameters

Parameter values

Power supply 12-24VDC ± 10%, 5W

AD converter 8-channel 24 bit (16 million points)

Sampling rate of 4.8kHz, conversion rate of 600 times per second

Linearity<0.01% FS

Temperature drift:<0.0005% FS/℃

Display range: ± 999999

Lowercases: 0~4

Digital filtering: 21 levels, refresh rate of 5-600Hz

Metrological certification (trade legality)

Standard: OIML R76:2006

Accuracy level: Level III

Maximum calibration division value: 10000d

Minimum input signal: 0.2 μ V/VSI

Working temperature (authentication mode): -10~40 ℃

Core functions

8-channel independent acquisition

Real time monitoring of the status of each sensor and automatic identification of activated/inactive channels.

Digital Balance Technology

Replacing traditional junction box potentiometer adjustment, achieving multi-sensor balancing in one step without long-term drift.

Load distribution analysis

Display the load of each channel in graphics and percentages, supporting archiving, querying, and printing.

Advanced Diagnosis

Single channel overload protection, sensor disconnection detection, zero point automatic diagnosis.

Tilt compensation

External inclinometer achieves * * ± 10 ° * * tilt weight correction, and certified models are available.

Event log

Store the last 50 operations (calibration, peeling, alarm, parameter modification).

control function

Weight stability judgment, multi-point linear calibration (up to 8 points), automatic zero setting, gross/net weight tracking, batch batching, automatic drop calculation, alarm output.

Environment and Protection

Working temperature: -20 ℃~+60 ℃

Storage temperature: -30 ℃~+80 ℃

Humidity: * * 85% * * No condensation

Protection level:

Standard: IP67

Stainless steel: IP68

Sanitary type: IP69K

Optional configuration

OPZWALIBI: Alibi Memory (Audit Tracking)

CASTLM8I: AISI 304 stainless steel chassis, IP68

CASTLM8I3A: Sanitary type, IP69K, 3-A certification

CASTLG series: IP67 PC case, external keyboard

Key issues

Question 1: What are the core advantages of TLM8 compared to traditional multi-sensor junction boxes?

Answer: The biggest advantage of TLM8 is its 8-channel independent digital acquisition+digital balancing function, which does not require traditional analog junction boxes and potentiometer adjustment. It can directly connect up to 16 sensors and complete balancing in one step without temperature drift or long-term drift. At the same time, it supports independent diagnosis of each sensor, load distribution display, overload protection, greatly improving accuracy and stability.

Question 2: What mainstream industrial buses does TLM8 support and how does it connect with PLC?

Answer: TLM8 supports almost all mainstream buses, including Modbus RTU/TCP、CANopen、Profibus DP、EtherCAT、Profinet IO、EtherNet/IP、Powerlink、SERCOS III。 Can be achieved through:

RS485 (Modbus RTU) low-cost connection

Dedicated bus port (dual RJ45) for high-speed buses such as EtherCAT/Profinet

16 bit analog output (4-20mA/0-10V) directly connected to PLC AI module

Question 3: What are the OIML parameters and applicable conditions for TLM8 trade certification?

Answer: TLM8 has passed OIML R76 Level III certification and meets the legal weighing requirements for trade:

Maximum calibration scale: 10000d

Minimum input resolution: 0.2 μ V/VSI

Working temperature in authentication mode: -10~40 ℃

Supports single interval, multi interval, and multi range modes, with password protected parameter modifications to ensure measurement compliance