Electrical system – 5000 General Order number 235568-040
Date 2006-04-10
Valid from serial number 904526-
T-code 795
10- Electrical system – 5000 10.1 General The electrical system of the truck is based on the SEM-X system. • The main power source is a 24 V DC traction battery. • The travel drive motor is a separate excitation type (SEM). The travel drive motor is operated by a self-contained transistor regulator relying on pulse width modulation (PWM) technology. • The lift unit motor is a conventional DC motor without any external field winding connections. Switch-on of the hydraulic unit's electric motor is achieved using a contactor. • A set of parameters used to adjust the truck’s performance and braking characteristics is stored in the transistor regulator. The regulator also monitors error conditions that may occur.
10.1.1 Firmware (truck control software) The current firmware version in the transistor regulator is V1.10. The firmware stored in the transistor regulator cannot be updated or changed.
10.2 Nomenclature Items shown in square brackets [ ] refer to electrical component designations as stated in the electrical wiring diagrams. See “10.3.1 Electric component overview” on page 4.. {high} refers to a voltage level that is approximately the same as the supply voltage level. {low} refers to a voltage level of approximately 0 Volt. s/c = short circuit. o/c = open circuit.
© TIEE SARL
Service Manual
SP10, SP10S
10- 1
