External Bus Characteristics¶
The AL-1032 supports a variety of ways to configure a system that an external bus may be applied to a device under test. The following sections outline what sources are available and what enable triggers are compatible with each source.
Number of external buses |
4 |
Switch type |
FET |
AUX1, AUX2 Series Resistance |
0 Ω |
EXT1, EXT2 Series Resistance |
1 kΩ |
Maximum supply voltage |
60 V |
Maximum supply current |
8 A |
Enable trigger details |
|
Trigger type(s) |
Software, External digital output (See RTI Characteristics for more details.) |
Over-current Protection¶
The AL-1032 module is equipped with over-current protection circuitry on all AUX/EXT rails to prevent damage of the module when dealing with current close to the module’s design limits.
A rail (AUX/EXT) refers to any of the six (6) high-current inputs on the RTI of the AL-1032, and each of those input rails are equipped with an over-current protection circuitry for detecting currents more than ±2A (i.e., 2A coming in or 2A going out).
The AL-1032 module has the following rails: AUX1, AUX2, EXT1A, EXT1B, EXT2A and EXT2B (See RTI Characteristics for more details.)
The ±2A “limit” is per rail, so it is shared across all channels that use that specific rail. When the over-current protection circuitry is tripped, a digital signal is sent to the onboard FPGA that disables the rail where the over-current condition occurred. In the over-current state, the LEDs on the front panel will be overridden and will flash yellow with a 1Hz update rate.
If the user is not able to see the flashing LEDs in the over-current state, the channels on the impacted rail will appear to be unresponsive. The only way to restore normal operations is to power cycle the SLSC chassis or the HIL system.