Agilent Technologies B2201A manual To Make Interlock Circuit, Interlock Connector Pin Assignments

Installation

Output Connections

To Make Interlock Circuit

The interlock circuit is to prevent electric shock when touching measurement terminals. You must install an interlock circuit on shielding box to prevent dangerous voltages when door of the shielding box is open.

Figure 2-3 shows the pin assignments of the interlock connector.

Figure 2-3 Interlock Connector Pin Assignments

WARNING	Dangerous voltages of up to the maximum voltage of SMUs may be present at
	force, guard, and sense terminals when the interlock terminals are shorted.

To Install Interlock Circuit

Install the interlock circuit as follows.

1. Mount two mechanical switches on your shielding box, so that the switches close when the door of the shielding box is closed, and open when the door is opened. For the recommended parts and the dimensions of the switch, see Figure 2-4 and Figure 2-5.

2. Use wire to connect the two switches in series between pin number 1 and 2 (or 3) of the interlock connector. See Figure 2-3.

For example, Agilent 4155/4156 is connected to the interlock circuit, it cannot force more than ±40 V when the door is open. When door is closed, it can force more than ±40 V.

Agilent B2200 User’s Guide, Edition 2 2-15