ES4408.1 Load Chassis - User’s Guide
21
ETAS
Hardware
Configuration
Configuration takes place on the board and concerns the use of loads, the pull-
up/pull-down setting of the loads against specific battery nodes and configura-
tion of the ground.
3.1.3
ES4435.1 Current Source Load Board
The ES4435.1 Current Source Load Board is used to simulate low current loads in
the ES4408.1 Load Chassis. It has 24 voltage-controlled, regulated current
sources which are used as pull resistances. Each of these current sources can
drive currents of 5...150 mA (with 6 V...20 V battery voltage) – the current
sources are enabled/disabled depending on the state of a specific battery node.
A total of seven boards of the type ES4435.1 Current Source Load Board or
ES4434.1 Configurable Load Board can be used in an ES4408.1 Load Chassis.
Place of Installation and Connections
The ES4435.1 Current Source Load Boards are installed (mixed with ES4434.1
Configurable Load Boards – see section 3.1.2 on page 20) in slot 5...slot 11 of
the ES4408.1 Load Chassis (see "The Slots of the ES4408.1 Load Chassis (View
from the Front)" on page 22).
The channels of the boards can be accessed at connectors “Load 9” ...
“Load 15” on the rear of the ES4408.1 Load Chassis.
Configuration
The configuration is taken care of in the software (in LABCAR-RTC) and concerns
the operating mode (pull-up/pull-down) of the individual channels, the battery
nodes and the current.
3.1.4
ES4450.2 Load Board for 4 RB CRS Injectors and ES4451.3 Load Board for 4 RB
GDI Injectors
The ES4450.2 Load Board for 4 RB CRS Injectors contains four loads for simulat-
ing Common Rail injectors; the ES4451.3 Load Board for 4 RB GDI Injectors con-
tains four loads for simulating injectors for gasoline direct injection.
The board’s channels are designed for 90 V/20 A. There are four galvanically iso-
lated, either analog or digital, channels available for measuring currents over the
loads and four galvanically isolated analog channels for measuring voltages.
In addition to these two boards, the carrier board (ES4455.1 Load Board) and the
loads (two each in the form of a piggyback) can be obtained separately.
Place of Installation and Connections
The injector loads are installed in slot 0...slot 2 of the ES4408.1 Load Chassis (see
"The Slots of the ES4408.1 Load Chassis (View from the Front)" on page 22).
The channels of the boards are made accessible at connectors “Load 8-1”,
“Load 8-2” and “Load 7” on the rear of the ES4408.1 Load Chassis. Corre-
sponding connectors for measuring currents, “Meas 8-1”, “Meas 8-2” and
“Meas 7”, are next to them.
