Keithley 500 914 01B free download

File name 500_914_01B.pdf

AIM4 Isolated High-Level Analog Input Module The AIM4 Isolated High-Level Analog Input Module provides isolation and signal con- ditioning for four channels of voltage input (from *5OMV to *5V) or current loop in- put. Because the input channels are completely isolated from other channels and from the system ground, the AIM4 module accepts signals with common mode voltages as high as *50W, and provides protection to #JOV (normal mode). Channel-to-channel isolation is 500V. The AIM4 module provides switch selected gains of xl or x100. By changing resistor and potentiometer values, individual local gains can be selected for each channel. The AIM4 module may be placed in slots 3-10 of the baseboard (slots 2-10 if AMMl is used). To install the module, remove the top cover and insert the module in the desired slot with the component side facing the power supply. Place the AlM4 module as far away from the power supply as possible to minimize noise and thermal effects. CAUTION: Always turn off the power before installing or removeing modules. To minimize the possibility of EM1 radiation, never operate the system with top cover removed. Connect the + and - inputs of unused channels together. User-Configured Components Gain amplification for each channel can be changed by setting switches SW.-S104 to the desired positions (xl or x100). As shipped the AIM4 is configured for xl gain (see Figure 1). Installing resistors in the appropriate locations provides current to voltage conversion, allowing connection of current loop inputs. All inputs are connected to a bank of screw terminals, which provides positive and negative (high and low) terminals for each of the four input channels. See Table 1 for summary of user-configured components. Table 1. User-Configured Components on the AIM4 Name Designation Function Switches lOl-104 SlOl, Sl.02, SlO3, S104 Gain setting channel 0, 1, 2, 3 (xl or x100) Potentiometer Rlffl, R105, RlO9, Rll3 Trim gain for each channel Resistors User Installed Optional current voltage resistors. Screw Terminals 162 Innut saew terminals. channels O-3 Document Number: 500-91401 Rev. B AM41 Figure 1. AIM4 Module Configuration Connections Terminals for connections to the AIM4 module are marked on the module. Typical con- nections are shown in Figure 2. The use of shielded cable is recommended to minimize noise pick up and the possibility of EMI radiation. One end of the shield should be connected to the AIM4 ground and the other end left dis