Instructions for use 739 948
Page 3/6
LEYBOLD DIDACTIC GMBH
.
Leyboldstrasse 1
.
D-50354 Hürth, Germany
.
Phone +49 2233 604-0
.
Fax +49 2233 604-222
.
e-mail: info@leybold-
didactic.de
by Leybold Didactic GmbH
Printed in the Federal Republic of Germany
Technical alterations reserved
1.4
Charging
6. Activate the charging station by actuating enabling
switch
1
7. Activate the “charging” switch on the
automotive high
voltage trainer, 739 947
8. The main contactor switches the charging voltage on
and blue indicator light
2
lights up.
2.
Application
2.1
CP communication signal
Communication with vehicle via the CP contact begins. The
charging current upper limit is transmitted to the vehicle by a
PWM signal. The protective earth conductor connection is
checked at the same time. A warning symbol or faulty installation
lights up when the protective earth conductor is missing.
The communication signal between the vehicle and charging sta-
tion can be measured at the CP (
5
) socket against the PE socket
while charging.
Fig. 2 - Measuring sockets for the CP contact
The positive amplitude of the CP signal depends on the charging
status:
Status
A
«Active»
U
max
= +12 V
Status
B
«Ready»
U
max
≈ +9.3 V
Status
C
«Charging»
U
max
≈ +6.7 V, PWM active:
Fig
. 3 - Status C, Charging
The coding resistance for the maximum permissible charging
current can be measured between the PP/CC and PE measuring
sockets. For
charging cable mode 3, 3~, 739 951
that is 680
Ω
,
which corresponds to 20 A.
Safety note
While charging is active, the plug is locked. Do not attempt
to forcibly pull out the plug since the locking mechanism
could otherwise be damaged!
In the delivery state, the charging request with Status D is re-
jected with an error message. This behaviour can be repro-
grammed via the MODBUS interface by setting the 4010 address
(16 bit) from «0» (default) to «1».
Status
D
«Charging»
U
max
≈ +3.4 V, PWM active:
Fig. 4 - Status D, charging with ventilation
The positions of the 4 mm measuring sockets of the CP and
PP/CC signals are selected so that a plug-in element can be in-
serted as a replacement directly against PE.
Insert an STE
diode 578 51
as shown in order to ground the volt-
age of the CP signal and thus induce the «Status
E
» fault state.
This is indicated by an indicator light.
