Model 2657A-PM-200 Protection Module
2
PA-1055 Rev. A / February 2012
To prevent damage to the Model 2657A-PM-200 in the case of device failure, the current from the
high-voltage source should be limited to 120 mA or less.
The Model 2657A-PM-200 protection module must be connected to protective earth (safety
ground) using the the supplied green-yellow ground cables (Model CA-568). Connection of
both ground cables to protective earth are necessary for safety.
Figure 2: Model 2657A-PM-200 grounding
The standard triaxial IN connectors are used for connection to the SMU. Maximum clamped voltage on the IN
connectors is 240 VDC. The high voltage triaxial connectors are used for connection to the device under test. Do
not exceed 3280 V on the OUT connectors.
•
The center conductor of the LO,SL connectors is sense LO and the inner shield is LO. The outer shield (shell)
is chassis ground.
•
The center conductor of the HI connectors is HI and the inner shield is guard. The outer shield (shell) is chassis
ground.
•
The center conductor of the SH connectors is sense HI and the inner shield is guard. The outer shield (shell) is
chassis ground.
