Power-On Functional Test Options |
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In order to accommodate the complexities of power-on functional testing, CheckSum offers a selection of accessories. Some of these mount into controller (PC) expansion slots, while others are typically mounted in available rack space or inside the test fixture (in close proximity to the UUT connections). The fixture-mounted accessories are installed with screws through provided standoffs. Connections are made with standard ribbon-cable connectors or wire-wrapping. |
PS-UUT-L1 Programmable Power Supply |
The PS-UUT-L1 programmable power supply option is used to provide UUT power for functional test and device programming with MultiWriter.
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Model DIG-1 Digital I/O Module |
| The Model DIG-1 module can be used to power-up and functionally test circuit assemblies with digital I/O signals. The DIG-1 digital I/O pins can be controlled by the Visual MDA test system and by boundary-scan. The DIG-1 module provides 48 relay-isolated digital I/O pins and Visual MDA test systems can be configured with 96 pins per system. The module supports 3.3V and 5V logic levels. Relay-isolation allows the DIG-1 module to be used with integrated MDA and functional test fixtures. The power and ground outputs are relay-isolated. The boundary-scan I/O pins are relay-isolated. The Model DIG-1 is controlled by CheckSum's Visual MDA™ for Windows software. This software provides a variety of software functions to create a flexible test environment. Download DIG-1 Spec  |
RM-1 Relay Module |
| The Model RM-1 general purpose Relay Module can be installed in an unused controller (PC) slot. It provides eight undedicated relays, four form-C and four form-A, rated at 1A. This relay module can be used for switching UUT power or signals, and also includes eight optically-isolated, high-voltage digital inputs. The Model RM-1 installs in a short PC expansion slot and has a 37-pin D-Sub back-panel connector. Download RM-1 Manual |
FIX-50P-SWO Switch-Over Module |
The FIX-50P-SWO is a 50-pole double-throw relay module normally mounted inside the fixture. It can be used to disconnect test points to eliminate loading, prevent overvoltage at the test inputs, switch test points between analog and digital signals, or to discharge the UUT prior to testing. A single TTL input signal controls all the relays. The relays are powered by a +12VDC source such as the PC's power supply. |
TR-6-2 Interface Module |
| The Model TR-6-2 Fixture Interface Module provides various special functions in the test fixture. It includes two double-contact 10A power relays for switching UUT power. Optionally, it can be populated with six additional TR-6-2-RLY power relays, a dual-channel counter-timer buffer/prescaler (TR-6-2-CT), two DMM differential buffer/amplifiers (TR-6-2-DMM), and up to four 17-point switch-over modules each using two power relay sockets (TR-6-2-SWO). A breadboard area provides room for custom circuitry such as DC-DC converters. Other TR-6-2 accessories include cabling for direct connection to CheckSum's vacuum receiver interface (50-pin is TR-6-2-THC, 17-pin is TR-6-2-SWC). All the FUNC-2 back-panel connections (relay-isolated fused power, digital and analog I/O, relay-switching) are available on the TR-6-2.
The Fixture Interface includes standoffs for easy mounting inside the fixture or on any flat surface. The 50-pin ribbon cable from the Model FUNC-2 back panel can be directly plugged into the Fixture Interface. Alternatively, when used inside a Model TR-3A vacuum test head, the special Model TR-6-2-THC plugs directly from the Fixture Interface to the inside of the fixture wiring block connected to the Model FUNC-2. The basic Fixture Interface contains two power relays, connectors and interface circuits. You can install your own components to tailor it to your application or purchase kits from CheckSum to populate it as necessary:
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