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Locomotive Cab Display Module (LCDM)
Maintenance Manual
Doc. No. IP-235
03
6.1
General
This section is aimed solely at trained electricians. Basic knowledge of installation, EMC
measures and safe behavior is required.
Designated operational location
The equipment is intended for use on rail vehicles. It is installed in the driver's cab.
Installation conditions
A permanently secured connection to the vehicle earth (operating earth) must be established
at the prescribed connection (earthing bolts). This requires a maximum 3 ft (1 m) long metal
braid with a minimum diameter of 0.015 sq in (4 mm
2
). The service and maintenance per-
sonnel must be electrostatically discharged to protect the operating resource.
Wiring and signal requirements
The supply voltage (battery voltage) and all related signals may not be connected to the
operating earth; otherwise the potential isolation in the device will be cancelled and safe
operation cannot be guaranteed.
Signal reference to the vehicle battery is only permitted for the supply voltage. Lines with
battery-related signals may not be fed to the unit in combination with the signalling lines.
Shielded cabling throughout is specified for the lines of the RS-422 serial interfaces. The
shield must be connected to the LCDM by a conductive plug housing. Preferably, the shield
should be connected on both ends of the cable.
The service interfaces Ethernet, RS-232 and the USB interfaces are only for testing and
diagnosis purposes and should not be connected when the vehicle is in operation.
The braided screens of all screened cables must have an optical range of at least 85%. The
connections to the line screens shall be made appropriately in relation to EMC. All shielding
and earth connections must be connected via a broad contact surface.
Unused plugs must be covered with a cap.
Evaluation and peripheral device requirements
All connected devices must comply with the technical specifications given in the operating
instructions to ensure correct function.
6 Installation Requirements
In order to avoid malfunctions or damage, all the
instructions in this section must be complied with.
