Bosch Rexroth RA 10 Series - Variants with Parallel Operation of the Output Stages

RE95230-B/2021-12-01, BoschRexrothAG
Installation | Analog amplifier RA 37/48
(2.4 kΩ
(1 kΩ
+
-
IM1
4.5V0.5V
u
i
IM1
+
-
8.4V
4.0V
16
4
17
3
2
4.0V
12
11
22
10
+
-
8.4V
23
IM2
i
+
u
-
IM2
2.5V
2.5V0.5V 4.5V
R1
R2
UST
Wiring in connector
Channel 2
Setpoint
processing
Output stage
Solenoid 2
USETPOINT
USETPOINT
Channel 1
Setpoint
processing
Output stage
Solenoid 1
USETPOINT
Fig� 30: Connection variant 8
Monitoring of cable break is not possible with this variant.
Due to the reduced signal stroke of 2 V in both directions, the maximum current
may not be reached.
7�5�3 Variants with parallel operation of the output stages
With the following variants, the two channels are simultaneously controlled by
acommon signal source.
9
U
Batt
Parallel operation
Wiring in connector
Channel 2
Setpoint
processing
Output stage
Solenoid 2
Channel 1
Setpoint
processing
Output stage
Solenoid 1
8.4V
4.0V
8.4V
4.0V
Fig� 31: Connection variant 9
Connection variant 8
Setpoint value specification
by joystick
Input signal
0.5 ... 4.5 V
Working range
Channel 1: 2.5 ... 4.5 V
Channel 2: 0.5 ... 2.5 V
Notice:
The stated values
for R1 and R2 may vary
since the voltage at pin16
(8.4 V) is within tolerance
and also depends on the
sum R1+R2.
The sum of R1 and R2 must
be within arange of 2 kΩ
and 5 kΩ
Connection variant 9
Parallel operation
Control of both channels
using one potentiometer
Potentiometer between
8.4 V and 4.0 V connected.
Input signal
4.0 ... 8.4 V.