Quantum Motorized Attenuator User Manual
Motorized Attenuator Operating
Manual
Version 0.4
Quantum Composers, Inc.
212 Discovery Drive
Bozeman, MT 59718
Phone: (406)582-0227
Fax: (406)582-0237
www.quantumcomposers.com
1 Table of Contents
2 Introduction ............................................................................................................................................... 2
3 Setup .......................................................................................................................................................... 2
4 Electrical Connections ................................................................................................................................ 3
5 Software Operation.................................................................................................................................... 4
6 Command Set ............................................................................................................................................. 5
Device Command Format ..................................................................................................................... 5
Device Addresses .............................................................................................................................. 6
Command Types ................................................................................................................................ 6
Control Commands ............................................................................................................................ 6
Query Commands .............................................................................................................................. 6
Common Commands ......................................................................................................................... 7
Global Commands ............................................................................................................................. 7
Command Set ..................................................................................................................................... 7
7 Specifications........................................................................................................................................... 8
2 Introduction
The Quantum Composers motorized attenuator module provides lineari zed control of
polarized laser energy. The attenuator may be adjusted from 0% to 100% with a shutter
closure to ensure no residual energy at 0% output. Internal calibration, linearization,
and anti-backlash funct ions simplify setup and control. The module is controlled via a
RS232 serial interface that can be daisy chained to other Quantum Composers laser
modules.
3 Setup
The motorized attenuator should be placed such that the laser beam is normal and
center on the input aperture of the attenuator. This will insure optimum extinction ratio.
Connections to the devi ce for basic operation are listed in the electrical connections
section. At a minimum, power (5V and 12V) and RS232 (serial) connections are
required.
Pin Number
Type
Description
1
Ground
Power Ground
2
Power input
+5VDC
3
Power input
+12VDC
4
Power input
+12VDC
5
Ground
Power Ground
6
Ground
Power Ground
7
Input
RS232 Receive (from PC or other module)
8
Output
RS232 Transmit (to PC or other module)
8
Output
RS232 Pass-through In (from other module)
9
Input
Analog reserved (do not connect)
10
Ground
RS232 Pass-through ground
11
N/C
No connection
12
Input/Output
Bus sense line (connect between modules)
4 Electrical Connections
The motorized attenuator module requires two input voltages to be applied for
operation:
+5VDC @ 100m A.
+12VDC @ 500mA.
The included power/communications cable includes the minimum connections for
operation. Detailed electrical connections are described in the tables below.
Input Connector (Connector: Hirose #DF11-12DS-2C, Contacts Hirose #DF11-2428SC)
9 Input Analog reserved (do not connect)
10 Ground RS232 Ground
11 N/C No connection
12 Input/Output Bus sense line (connect between modules)
Output Connector (Connector: Hirose #DF11-12DS-2C, Contacts Hirose #DF11-2428SC)
Pin Number Type Description
1 Ground Power Ground
2 Power output +5VDC
3 Power output +12VDC
4 Power output +12VDC
5 Ground Power Ground
6 Ground Power Ground
7 Input RS232 Pass-through Out (to other module)
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