Keithley 500 935 01B free download

File name 500_935_01B.pdf

DOMI Digital Output Module The DOMl Digital Output Module offers 16 channels of optically isolated digital output. These channels are factory configured as TTL compatible voltage outputs. By removing resistors and jumpers, output may be configured as switches. Functioning as switches, the output channels can control loads up to +28V. Digital output channels are grouped into two ports of eight channels; each port treated as a single byte from software. This grouping allows simultaneous updating of up to eight channels, and enables communication with 4 and &bit TTL devices. Digital Output Modules can be installed in any slot of the Series 500. To install the module, remove the top cover and install the board with the components facing the power supply. CAUTION: Always turn off the mainframe power before installing or removing modules. To minimize the possibility of EM1 radiation, never operate the system with the top cover removed. User-Configured Components The DOMl is factory configured to provide isolated TTLcompatible outputs. In this configuration, external +5V and ground wires must be connected to respective module terminals. By moving the positions of two jumpers (Wll.7 and Wllg), The module can also be used in a non-isolated TTLcompatible configuration that uses the module's own +5V and ground connections. Resistors to ground and wire jumpers to +5V may be removed to configure individual outputs as switches, thus allowing circuits with potentials as high as 28V to be controlled. Connections to the module are made to screw terminals located along the top edge of the module. Each terminal accepts 16-24 gauge wire leads. Used-configurable com- ponents are summarized in Table 1. Document Number: 500-935-01 Rev. B DOMl-1 Table 1. User-Configured Components Component Designation Function Resistors 103-118 R103-R118 Configured output for TTL Jumpers 101-116 WlOIWll6 Configures output for TTL Screw Terminals Jl37 Positive and negative output connections Internal +5V, Part of Jl37 Connects to module supply Ground External +5V, Part of Jl37 Connect to external supply Ground Jumpers 117-118 4117, Wll8 Sets module for external (isolated) or internal (non- isolated) operation Figure 1. DOMl Module Configuration DOMl-2 Connections A terminal strip containing all module connecting points is located at the top of the board. In addition to (+) and (-) connections for each of the 16 channels, there are also terminals for both int