Bosch Rexroth RA2-1/10 - 7.4.4 Pin assignment

RE95230-B/2021-12-01, BoschRexrothAG
Installation | Analog amplifier RA 31/48
7�4�4 Pin assignment
Table 7: Pin assignment RA2-1
Signal Description Pin
Inputs
PWR supply 1 Supply voltage for solenoid 1 and electronics 19
PWR supply 2 Supply voltage for solenoid 2 and electronics 20
Notice:
The supplies are permanently assigned to the PWM output stages. For example, if the supply
P
W
R supply 1 is interrupted, output stage 1 is no longer supplied.
The electronics works as soon as it is supplied with voltage via one of the two pins (19 or 20),
i.e. also if one of the two ports is torn off. This is useful, for example, for an emergency stop in apress.
GND supply 1 Ground (supply voltage solenoid 1) 6
GND supply 2 Ground (supply voltage solenoid 2) 8
Current range
switchover
Switches the current range over.
Defaults: Not wired: 200 ... 600 mA
Connected with +U
Bat
: 400 ... 1200 mA
Notice:
If the circuitry of pin18 fails (e.g.wire break), this halves the current.
18
Analog In 1 Differential voltage input (control solenoid 1): non-inverting input 4
inverting input 17
Analog In 2 Differential voltage input (control solenoid 2): non-inverting input 10
inverting input 22
Notice:
The differential voltage is ameasure of the control; the higher the differential voltage,
t
he hi
gher the current.
Ramp off Switches the ramp function off.
Not wired:
Output signal is adjusted to input signal with time delay (time ramp).
Connected with +U
Bat
:
Output signal is adjusted to the input signal without time delay.
This is useful, for example, for individual external time ramps.
5
PWM frequency Defines the PWM frequency of the proportional outputs.
Not wired: 100 Hz
Connected with +U
Bat
: 350 Hz
GND: 200 Hz
21
Parallel operation Specifies the operating mode.
Not wired: toggling operation,
interlocked control of solenoid 1 and 2
Connec
ted with +U
Bat
: parallel operation,
independent control of solenoid 1 and 2
9
Dig In S
witching input.
If avoltage between 5V ... U
Bat
is applied, the "Dig Out" switching output (pin7) is activated.
Example:
The switching input can be used e.g.for an automatic emergency brake. For this purpose, the signal
is f
ed fr
om the error output (pin15) to pin24 and abrake is controlled with the current of pin7.
24
GND signal Signal ground (potentiometer and sensor supply for differential input 1) 2
GND signal Signal ground (potentiometer and sensor supply for differential input 2) 12