THORLABS PM103 User Manual

Page 34 MTN023788_D02
PM103x Optical Power Meter Interfaces Chapter 5 Specifications
5.3 Pin Sensor Connector
The sensor connector allows the access of all Thorlabs “C-type" photodiode and pyroelectric sensors.
The power meter interface uses the sensor calibration data, stored in the sensor connector, to calculate
the corresponding actual power levels.
Additionally, the PM103x is capable to support custom made detectors. Please read the following
instruction prior to connecting a self made sensor.
Warning
Pin 2 is uniquely used for the EEPROM Digital I/O (memory in Thorlabs sensor heads) and MUST NOT be
used. Connecting this Pin may cause malfunction of the PM103x.
Pin-out of the DE-9
female connector
(female)
Pin
Function
Description
1
Power Supply
+5 V; Max Current 50 mA from this Pin
2
EEPROM
Sensor Memory for the Calibration Data
3
AGND
Analog Ground for Photodiode, Pyroelectric Sensor, NTC
4
PD -
Photodiode Cathode Input
5
PY +
Pyroelectric Sensor Input
6
DGND
Digital Ground for EEPROM and 5 V Output
7
PRESENT
Sensor Recognition, NTC Input. For Custom Sensors: Connect via a 1 kW –
10 kW Resistor to Pin 3 (AGND) to Enable a Custom Sensor
8
N.C.
Not Connected
9
N.C.
Not Connected

THORLABS PM103 Specifications

General

Brand	THORLABS
Model	PM103
Category	Recording Equipment
Language	English