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THORLABS PM103 Operation Manual

THORLABS PM103
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© 2021 Thorlabs
PM103x
Page 11
MTN023788_D02
3.2.5 USB Operation
All PM103x models can be run via the USB port. The USB interface on all PM103x models also
serves to connect a power supply and to update firmware of the PM103x.
The PM103U uses the USB interface as the only port for control and output.
Note USB vs UART operation for PM103
In case a USB communication is established in addition to the DA-15 connection, the PM103
switches to USB-Mode and the DA-15 serial interface becomes inactive. Only after actively
closing the USB connection, the serial communication is reestablished.
When switching the PM103 in the opposite direction, from USB to RS232 operation or to UART
operation, PM103 uses the DA-15 interface for control and output.
3.2.6 RS232 Operation
The power meter PM103 can be operated with serial communication via RS232.
Please use a RS232 standard protocol for RS232 communications. For questions, please con-
tact our engineers at Thorlabs .
Please set up the port as follows:
Parameter
Setting
Baud Rate
115.200 Bit/s (default)
Supported range of Baud Rate: 9.600 and 230400 Bit/s
Data Bits
8
Parity
None
Stop Bits
1
Flow Control
None
Termination Character
LF (x0A; \n). The termination character needs to be enabled.
Note
PM103:
To operate the PM103 via RS232, RxD, TxD, and GND need to be wired from the DA-15 con-
nector to a 9 Pin female connector to perform the connections.
Male DE-9 Pin
Female DE-9 Pin (PC)
Pin2
Pin2: RxD
Pin3
Pin3: TxD
Pin5
Pin5: GND
26

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THORLABS PM103 Specifications

General IconGeneral
BrandTHORLABS
ModelPM103
CategoryRecording Equipment
LanguageEnglish

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