1 Mounting instruction

Before the installation must be ensure that the PLC host and BD associated equipment power off. Please install the BD module in the corresponding position of the PLC, and lock the four standard screws. If environmental dust is bigger, please cover BD right part by PLC’s cover. Please do not power operation.

Caution

This BD module only support the following firmware versions or later. Users can check the PLC firmware version in D8001.

• LX3VP:25103;
• LX3VE: 25201;
• LX3V-A2:25014;
• LX3V-A1: 22006;
• LX2V: 24005;

When mounting module to PLC, all the lights are blinking after power ON PLC, please purchase new PLC.

Please fixed BD module on the PLC, poor contact may lead to failure.

BD module and top cover of PLC’s tightening torque is 0.3 ~ 0.6 N.m.

Warning

Make sure to power off the PLC before mounting or removing the BD module and put the cover in right place.

2 Special feature

1. LX3V-2TC-BD module equips with 2 channels analog output. This module will be mounted in the PLC, so there is no need to change the installation area of the PLC.
2. The type to AD convert of LX3V-2TC-BD is a thermocouple input type (K/J), and the converted digital value of each channel is stored in special registers, but the mode of analog-to-digital conversion cannot be changed. The corresponding channel as following table shows.

3 Dimension

LED lights indicating

1. LED1: ON when power ON.
2. LED2: flashes when communications.
3. LED3 (TC 1): On indicates enable, OFF indicates disable, flicker indicates exceeding the measurement range.
4. LED4 (TC 2): On indicates enable, OFF indicates disable, flicker indicates exceeding the measurement range.

If the BD module is plugged into the old firmware version when on the host, all LEDs will be flashing.

4 Specifications

1. Please refer to the LX3V user manual for the general specification of LX3V-2TC-BD.
2. LX3V-2TC-BD is powered supply by LX3V main unit.

Table 4‑1

✎Note: Ground-type thermocouple (3-wire) is not supported in this BD module.

5 Wire

Warning

Make sure cut off the electricity before installation/disassembly, to prevent electric shock or product damages.

Caution

1. Stay away from high-voltage cables to avoid interference or surge;
2. Grounding is required, but please do not share the ground site with high-voltage cable;
3. Do not weld any cable ends, and make ensure that the number of connecting cables, no more than a predetermined number;
4. Do not connect a substandard cable;
5. Fixed cable;

5.1 Suitable cable

Use AWG25-16 to connect the output equipment

The maximal screwing torque is from 0.5 to 0.6N.m

Table 5‑1

5.2 Input mode

6 Examples

The value of each channel is storage in the registers (D8112, D8113) in the form of digital. For output, in each "END" instruction, M8114 and M8115 convert the digital value into an analog output.

6.1 Basic Program Examples

Caution:

1. M8112 and M8113 are used to analog to digital conversion for CH1 and CH2;
2. LX3V-2TC-BD only supports K type and J type thermocouple;
3. Don’t try to change the value in D8112 and D8113, or D8116 and D8117 when finished the A/D conversion;

Set CH1 and CH2 as thermocouple input mode, and stored value in D0 and D2.

6.2 Examples of Applications

Since the LX3V-2TC-BD does not have offset and gain functions, if it needs for the values out of the standard specifications, additional programming orders will be needed to multiply or divide the converted value.

Caution

Since the use of additional programming orders, the converted precision and resolution of the analog value are different with the specifications.

The original range of the analog output does not change.

Thermocouple input mode

In Thermocouple input mode, LX3V-2TC-BD covert an analog value to a digital value in degrees Celsius. If in the program is Fahrenheit as a unit it needs to be converted to Celsius value.

Fahrenheit and Celsius conversion formula, Fahrenheit = Celsius * 9/5 + 32, the unit is 0.1 ℃.