Section 2
– Operation
TOELLNER Electronic Instrumente GmbH
7
2.2
Description of the controls
At the end of the manual you will find the various operating and display elements for the
series
TOE 9261
numbered with front panel and rear views. In the following the individual
operating elements are explained in detail.
2.2.1
Front panel controls
[1]
Mains switch for turning the power to the device on and off. When the unit is ON the
green
POWER
LED will be illuminated.
[2]
8x DIL switch. Assignments from top to bottom (Nos. 1 to 8):
1.
INPUT C:
Apply input buffer capacitor to input socket pair
Plus
– Minus
. Indication
by green LED.
2.
R = 10
kΩ:
Apply high-
impedance base load 10 kΩ parallel to output socket pair
OUT
–
Minus
. Indication by green LED.
3.
R = 100
kΩ:
Apply high-
impedance base load 100 kΩ parallel to output socket
pair
OUT
–
Minus
. Indication by green LED.
4.
S2 + 0.1
Ω:
Apply branch path switch
S2
with 0.1
Ω series resistor. Indication by
green LED (
2.4.9 Use of the branch path).
5.
S2 + 0
Ω:
Apply branch path switch
S2
without series resistor: Internal resistance
0
Ω. Indication by green LED (
2.4.9 Use of the branch path).
6.
S1 ENABLE:
Activation / deactivation of switch
S1
in order to carry out ground
interruptions using switch
S2
(
2.4.5 Connection of the consumer for switching a
ground line)
7.
CONTROL:
Inversion of the control signal present at front panel or rear
CONTROL input
8.
PULL-UP:
Apply pull-up resistor of approx. 22 k
Ω to the front panel or rear
CONTROL input
[3]
Front panel BNC input
CONTROL
for controlling the switching state both for the power
switch and the signal line switches (
2.4.7 Control of switching paths and operation
of the consumer,
2.5.2 Control).
[4]
Selectable input buffer capacitor. This appears parallel to the input socket pair
Plus
–
Minus
. The selection is indicated by the green LED next to the switch symbol.
[5]
Input sockets
Plus
– Minus
of power switch. The input voltage should preferably be
connected to the right-hand
Plus
socket and to the
Minus
socket. The left-hand
Plus
socket is used to connect the input voltage for carrying out ground interruptions.
An appropriate voltage source should be used to provide the input voltage. The
polarity and magnitude of the voltage must be observed; not more than the rated
voltage of the
TOE 9261
may be applied.
[6]
Longitudinal path switch
S1
of the power switch. Across this the connection between
the sockets
Plus
and
OUT
is applied. When
S1
is conductive the red LED below the
switch symbol will be illuminated.
[7]
Output socket
OUT
and right-hand
Minus
socket of the power switch. In order to
switch the positive supply line of a consumer, this must be connected to
OUT
and to
the right-hand
Minus
socket. If, on the other hand, the return line of the consumer is to
be switched, the consumer must be connected with the positive pole to the right-hand
Plus
socket [5] and the negative pole to
OUT
.
The voltage connected to
OUT
(in the case of a buffered and possibly preloaded
consumer) must not be more positive than the voltage at the
Plus
sockets or more
negative than the voltage at the
Minus
sockets.
