SWITCH 4840882 - Caterpillar

General Wiring Requirements
The circled ground symbol identifies the Protective Earth Terminal. This terminal must be connected directly to protective earth using a grounding conductor at least as large as those used on terminals 1 through 9. The insulation of the grounding conductor must be of green and yellow color.
This symbol identifies functional or EMC earth. This terminal is to be used for cable shield connections only. It is not to be used as a protective earth terminal.External wiring connections and shielding requirements for a typical installation are shown in the plant wiring diagram. Figure 1-3. These wiring connections and shielding requirements are explained in more detail in this chapter.To maintain compliance with CE marking requirements, the Low Voltage Directive requires that the Load Sharing Module must only be connected to Class III equipment.Wiring for the Load Sharing Module must be suitable for at least 90°C (194°F) and also be suitable for the maximum installed operating temperature.The Load Sharing Module must be permanently connected and employ fuses or circuit breaker in each of the PT lines to limit current to LSM PT inputs to no more than 5 A. In addition, a 2 A fast-acting fuse or circuit breaker must be provided in the 24 Vdc power supply line.All terminal block screws must be tightened to 0.56 to 0.79 N m (5.0 to 7.0 lb-in).To maintain compliance with CE marking requirements, the EMC Directive requires that all shields be connected to the terminals provided per the plant wiring diagram, Figure 1-3.Wiring for the Load Sharing Module should not exceed 30 m (98 ft) in length. If any signal run must exceed this limit, an isolator must be used within 30 m of the Load Sharing Module. The isolator must provide galvanic isolation via optical or magnetic means.Power Requirements
The Load Sharing Module is powered from a 24 Vdc source. The 24 Vdc source must be a minimum of 18 Vdc and a maximum of 32 Vdc continuous. If a battery is used for operating power, an alternator or other battery charging device is necessary to maintain a stable supply voltage.
CAUTION-BATTERYTo prevent possible serious damage to the Load Sharing Module, make sure the alternator or other battery charging device is turned off or disconnected before disconnecting the battery from the unit.
Shielded Wiring
All shielded cable must be twisted conductors with either a foil or braided shield. Do not attempt to tin (put solder on) the braided shield. All signal lines should be shielded to prevent picking up stray signals from adjacent equipment. Wire exposed beyond the shield must be as short as possible.The other end of the shields must be left open and insulated from any other conductor. Do not run shielded signal wires with other wires carrying large currents. See Appendix C, EMI Control in Electronic Governing Systems, for more information.Where shielded cable is required, cut the cable to the desired length and prepare the cable as instructed below and shown in Figure 2-1.
Figure 2-1. Preparation of Shielded Cables1. Strip outer