E-831– E-841– E-842
Power supplies for E-831.02 Easy Implementation The E-841.05 (input voltagerange 10 to 30V) and E-842.05
(input voltage range 30 V to 72 V) switched
power supply modules provide all the operat-
ing voltages (±15 V, -26 V and
+127 V DC) required by the E-831.02
amplifier module.Both models supply enough
power for up to three E-831.02
amplifiers with a total output
power of 5 W.A sync. input on the powersupply allows synchronization
of the internal switching fre-quency with an external clock(185 to 220 kHz) for elimination
of interference in AC-driven
position sensors or
Dacs. Triple Safety E-831 and E-841/E-842 modulesare enclosed in metal cases
with solderable pins for PCB
mounting. They are designed
to work together without addi-
tional components.
OEM Piezo Driver and Power Supply Modules
The E-831 amplifier is short-cir-cuit proof with both a low-
speed current limiter of 50 mA
and a high-speed (8 msec) cur-
rent limiter of 100 mA. When
the case temperature risesabove 70 °C (can be reachedafter a few minutes with maxi-
mum current) an internal tem-
perature sensor shuts down steadystate operation and thepower consumption depends
on the operating frequency,
high-powered amplifiers are
not required for many applica-
tions. With a peak output cur-
rent of 100 mA (sink/source)
the E-831 is well-suited forswitching applications and fasttransitions where the capaci-
tive load (the
piezo actuator)
needs to be charged as quickly
as possible. The small-signal
bandwidth is about 3 kHz.
Ordering Information E-831.02 Single-Channel Piezo Driver Module for LVPZTs E-841.05 Power Supply Module for E-831,Input 10 to 30 V E-842.05 Power Supply Module for E-831,Input 30 to 72 V the output stage until the tem-
perature drops below 60 °C.
This operation mode is in-dicated by the active-highTEMP-OFL TTL status line.
E-831.02 amplifier module Cost Effective Piezo Driver Small Size Low Noise, High Stability Easy-to-Use Full Overcurrent, Short-Circuit and Temperature Protection Power-up/down Without Voltage Spikes The E-831.02 OEM piezo drivermodule is a very compact,
cost-effective, single-channel,4-quadrant power amplifier forlow-voltage piezoelectric actu-
ators.It provides a peak outputpower of 12 W and average
power of 2 W (expandable to 5 W with external heat sink).
The E-831.02 is a high-preci-sion amplifier with a fixed gainof 10.0 and outputs voltages in
the range of -20 to 120 V forcontrol input signals ranging
from of -2 to 12 V. The output isfully compensated for thecapacitive loads of up to 10 µF
typical of PI’s low-voltage PZTs
such as PICMA
® piezo actua-tors. For monitoring purposes,
the output voltage is internally
divided by 100 and provided at
a special monitor pin.Because piezo actuators re-quire virtually no power in
E-841.05 power supply module © PI 1998–2006. Subject to change without notice. This data sheet is superseded by anynew release. The newest release is available for download at www.pi.ws. 06/10/30.0 30