Chapter 2  System Operation  15 
 
 
2.5.3  Modulation Input BNC Connector 
The Modulation connector provides external modulation control. See section 
3.3. 
2.5.4  Current Monitor BNC Connector 
This is the current monitor BNC.  
2.5.5  Detector Input BNC Connector 
The connector allows the connection of a BNC terminated detector. 
2.5.6  LDD Output Connector  
The LDD Output connector provides the laser connection. See section 3.3.  
2.5.7  Input Power Connector 
Accepts a standard line cord for AC input. Also selects one of four AC input 
settings: 100V, 120V, 220V, and 240V. The cord must be removed to 
change the setting. A small screwdriver will open the top of the module and 
expose the rotary switch. Select the range that is closest to your expected  
nominal RMS line voltage. The voltage selection is set for 120 VAC prior to 
shipping. 
 
 
CAUTION
 
Do not exceed 250 VAC on the line input.  
 
Do not operate with a line voltage that is not within 
±
10% of the line setting. Too low of an input voltage 
may cause excessive ripple on the DC supplies. Too 
high of an input voltage will cause excessive 
heating. 
2.5.8 GND Post 
Provides access to chassis ground, which is also an earth ground as long as a 
standard 3-wire line cord is used. This is a protective conductor terminal to 
be used to achieve chassis grounding requirements when the main 
connectors don’t provide an earth ground terminal. Use a minimum of 18 
gauge wire to connect to this terminal. 
 
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