Section 4: Maintenance
S540 Power Semiconductor Test System Administrative Guide
4-10
S540-924-01 Rev. D / January 2019
Power distribution unit connections and power distribution
basics
The 42000-PDU consists of:
24 VDC output to emergency off (EMO) circuits and cabinet fans with power
24 VDC output through banana jacks
Two specially switched power outlets (factory configuration: Always on)
Three groups of four switched outlets (off with EMO condition)
Remote connection to other 42000-PDUs through a 25-pin D-sub connector
Properly lockout and tagout the system before beginning installation or connection. Also,
never turn on the system until all connections and safety grounds are installed. Make sure
the main circuit breaker on the PDU is placed in the OFF position before making or breaking
any connections.
The following figure shows how the PDU is connected to the system EMO circuit.
Figure 47: PDU connection to the EMO circuit
