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Functional Test Accessories

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.

Features  
  • High Power Density 750W in 1U half-rack size
  • Wide Range Input (85 - 265VAC)
  • Output Voltage up to 60V, Current up to 12.5A
  • Over-voltage and over-current protection
  • Current foldback
  • Built-in RS-232/RS-485 Interface Standard
  • Size: 8.4 in. W x 1.75 in. H x 17 in. D / 21.34 cm W x 4.445 cm H x 43.18 cm D
  • Weight: 9.9 lbs / 4.5 kg
  • Worldwide Safety Agency Approvals; CE Mark for LVD and EMC Regulation
  • Side-by-side mounting of two units in a 19-inch rack

PS-UUT-L1 Programmable Power Supply

Download PS-UUT-L1 Model GENH 60 - 12.5 Technical Manual PDF


GPIB IEEE-488 Controller (GPIB-USB)

The GPIB IEEE-488 option allows you to connect and control external instrumentation with the CheckSum test system.

The GPIB-USB option can directly control GPIB instruments from within the CheckSum System software or you can write your own software using the included documentation. The GPIB-USB connects to an unused test system USB connector and to IEEE-488 instruments. This controller does not require a GPIB cable to connect to your instruments. You can attach it directly to the GPIB port on your instrument and then connect the USB cable to the USB port. If you have multiple instruments in a daisy-chain or star configuration, attach any cables that connect to the other instruments first, and then connect the GPIB as the last connector in the stack.

GPIB IEEE-488 USB


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 Model DIG-1 is controlled by CheckSum's Visual ICT/MDA™ for Windows software. This software provides a variety of software functions to create a flexible test environment. The DIG-1 digital I/O pins can also be controlled by boundary-scan.

The DIG-1 module provides 48 relay-isolated digital I/O pins and Visual ICT/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 ICT/MDA and functional test fixtures.

Download DIG-1 Spec PDF


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 User's Manual Instructions PDF


50 Test Point Switch-Over Board (FIX-50P-SWO)

The FIX-50P-SWO is a 50-pole double-throw relay board 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.

Download 50-Point Switch-Over Board Operating Instructions PDF


17 Test Point Switch-Over Board (FIX-17P-SWO)

The FIX-17P-SWO is a 17-pole double-throw relay board normally mounted inside the fixture. Relay contacts are accessed through common (COM), normally closed (NC), and normally open (NO) with each set on 17-pin headers and the relays are DPDT non-latching. This board is used to connect signals during functional test, share system resources between multiple UUTs, or provide isolation for ICT points. Works with +12V and DIG outputs from PWR-2 or FUNC-2B module.

Download 17-Point Switch-Over Board Operating Instructions PDF


16 Test Point Independent Relay Board (FIX-16P-IRB)

This board has independent control of 8 relays, each with 2 contacts and is 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. Each of the 8 control signals activate 1 relay with 2 contacts. The relays are powered by a +5VDC source such as a system power supply. This board is used to connect signals during functional test, share system resources between multiple UUTs, or provide isolation for ICT points. Works with +5V and DIG outputs from PWR-2 or FUNC-2B module.

Download 16-Point Independent Relay Board Operating Instructions PDF


TR-6-1 Relay Expansion Module

The Model FUNC-2 provides 16 relay-switched test points at its back panel. These test points can be expanded in 50-point increments by adding Model TR-6-1 Relay Modules (up to six TR-6-1 modules can be configured into a system).

The relay test points are used for UUT connections that exceed ± 12 volts with respect to the computer chassis when power is applied to the UUT. The Model FUNC-2 can make DMM and Counter/Timer measurements at these points. In addition, unguarded 2-wire ICT measurements (e.g. resistance, capacitance and inductance) can be made through these points. Each TR-6-1 module uses one full-length/full-height chassis slot.

Download TR-6-1 Interface Module Data Sheets PDF


TR-6-2 Fixture 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:

  • The TR-6-2-RLY is an additional power relay (up to 8 can be installed).
  • The TR-6-2-CT is the counter/timer interface parts.
  • The TR-6-2-DMM is the DMM signal conditioner interface parts.


The TR-6-2-SWO switch-over modules install into the power-relay sockets. Each TR-6-2-SWO, which uses two relay sockets, allows change-over of up to seventeen test points to select different source/measurement electronics or to locally isolate test points in the fixture to minimize capacitive loading on selected UUT points during power-on testing.

Download TR-6-2 Interface Module Manual PDF


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