Connecting the LTMCU
Overview
After you have mounted the LTMCU, you must connect it to the HMI interface port (RJ45) on the LTMR controller, or on the LTM E expansion module. You can also connect a PC to the LTMCU front face port. This section describes how to connect the LTMCU to both the LTMR and a PC.
Wiring Rules
The following wiring rules must be respected in order to reduce disturbance on the behavior of the LTMCU due to EMC:
-
Keep as large a distance as possible between the communication cable and the power and/or control cables (minimum 30 cm or 11.8 in.).
-
Cross over different types of cables at right angles, if necessary.
-
Do not bend or damage the cables. The minimum bending radius is 10 times the cable diameter.
-
Avoid sharp angles of paths or passages of the cable.
-
The cable shield must be connected to a protective ground at both ends.
-
The connection of the cable shield must be as short as possible.
-
Several shields can be connected together.
-
Perform the grounding of the shield with a collar.
-
Place the cable along the grounded plate around the withdrawable drawer.
| NOTICE |
|---|
|
UNINTENDED EQUIPMENT OPERATION
Use Schneider Electric standard cables.
Failure to follow these instructions can result in equipment damage.
|
Communication and Power Supply
The LTMCU connects to the LTMR controller via the RJ45 port at the rear of the unit (see Connecting to the LTMR Controller). This connection is used to provide both the communication signals and the power supply.
Connecting Cables and RJ45 Pinout
To connect the LTMCU and the LTMR controller, use the specific cables LTM9CU10 and LTM9CU30.
|
Pin no. |
Signal |
Description |
|---|---|---|
|
1 |
Reserved |
Do not connect |
|
2 |
Reserved |
Do not connect |
|
3 |
Reserved |
Do not connect |
|
4 |
D1 or D(B) |
Communication between LTMCU and LTMR controller |
|
5 |
D0 or D(A) |
Communication between LTMCU and LTMR controller |
|
6 |
Reserved |
Do not connect |
|
7 |
VP |
+7 Vdc power supply provided by the LTMR controller |
|
8 |
Common |
Signal and power supply common |
Connecting to the LTMR Controller
Power up
When the LTMCU has been connected to the LTMR controller, it powers up and performs a series of self-tests. During this time, the LCD display lights up and firmware version and language versions inside the LTMCU are displayed for a few seconds. After a successful connection, the backlight changes to the setting in LTMR and the main menu appears.
Connecting to a PC
You can connect a PC to the LTMCU via the RJ45 on the front face of the unit, as shown in the diagram below.
The diagrams below show the connections from a PC to the LTMCU and the LTMR controller, with and without the LTM E expansion module:
1 PC running SoMove with the TeSys T DTM
2 Cable kit TCSMCNAM3M002P
3 LTMR controller
4 LTM E expansion module
5 LTMCU Control Operator Unit
6 Grounding collar
7 LTM9CU•• HMI device connection cable
When the LTMCU is connected to a PC, the LTMCU becomes passive and cannot be used to visualize information.