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NI GPIB-140A 186135F-31 Channel voltage module

GMR 2-Block T Output Group A T- output group consists of two source-type blocks, connected in parallel on one side of the load. The other side of the load is tied to ground. The two blocks must be connected to two different busses. In a 2-block T output group, current to output loads is shared. Therefore, it is not possible to be sure exactly how much power is being provided by each block. If 16-circuit blocks in a 2-block T output group are configured for No Load fault reporting, the minimum connected load that can be used is 100mA. In a T-output group, the blocking diodes in block IC66*BRD020 minimize the reverse current into a block that is powered down or not driving the load. The blocking diodes prevent the block from being powered through its I/O points by the other block in the output group.

GMR I-Block Output Group

 An I-Block Output Group consists of a source-type block connected to one side of the load and a sink-type block connected to the other side. This type of group is most suitable for redundant shutdown applications. Both blocks in an I-Block Output Group must be either 16-circuit or 32-circuit blocks. The two blocks must be connected to two different busses. GMR H-Block Output Group In an H-Block Output Group, two source-type Genius blocks are connected in parallel on one side of each load and two sink-type Genius blocks are connected in parallel on the other side. An H-Block Output Group requires either two or three Genius busses.

If the blocks are on three busses, one source and one sink block in the group must be on the same bus. The two blocks on the same bus must have different serial bus addresses. If the blocks are on two busses, one source and one sink block are on one bus and the other source and sink block are on the other bus. Any blocks that share a bus must have different serial bus addresses.

Configuration Required for Input Autotest 

For 24/48VDC blocks in a GMR system, if Input Autotesting for the Input Group is turned ON in the GMR Configuration, then during the Genius configuration of the blocks in the group, the Output Pulse Test feature must be disabled. Otherwise, circuits that would normally pass the Input Autotest are incorrectly reported as having failed. When Output Autotest is disabled, the Input Autotest feature functions correctly. Diagnostics The block always performs its standard diagnostic checks, plus two configurable output diagnostics. The block reports all faults to the Handheld Monitor, and takes appropriate corrective action. Short Circuit Diagnostic (standard) If the instantaneous current exceeds 10 Amps at turn-on, the block turns the output off. The block attempts to restart the load; if two attempts are unsuccessful, the output circuit is forced off and the block sends a SHORT CIRCUIT message. The cause of the current surge must be removed, then the diagnostic must be cleared from the HHM or the CPU. Overtemperature Diagnostic (standard) If the block’s internal temperature exceeds 120º C, the block sends an OVERTEMPERATURE message and turns off the circuit to protect its internal electronics. Failed Switch Diagnostic (standard) For an output, Failed Switch is reported if the circuit’s switch state is not the same as its commanded state. The block sends a FAILED SWITCH message identifying the failed circuit. The logic state of the circuit is set to OFF. If the output switch has failed shorted (or closed), current flow is not interrupted when the block forces the output state OFF. Action external to the block must be taken to remedy the problem.