Restoring Power After An Emergency Shutdown; Wiring An Emergency Shutdown Switch - HP E1135C Operating And Service Manual

OPERATING DESCRIPTIONS
installed for safety and operator convenience. When an EMO Switch is pressed (opened), the
yellow Line/EMO Error Indicator on the front panel of the PDU will light.

Restoring Power After an Emergency Shutdown

Once the EMO Switch has been opened, the outputs will remain off, even when the EMO
Switch is subsequently closed. To restore the outputs, return the EMO Switch to the closed
position; then switch the Outputs Enable Switch off for at least 15 seconds and then on again.
This will reset the EMO control circuit and restore the outputs.

Wiring an Emergency Shutdown Switch

The EMO Switch must be a normally-closed, press-to-open switch. Wire the switch to J2 on
the Control Board as shown in Figure 9. To use multiple EMO Switches, wire them in series to
J2. The EMO circuit provides 12 volts dc at 1 milliamp.
There MUST be either a closed switch or a jumper wired to the EMO
terminals (J2 pins 5
Figure 9. Wiring an Emergency Shutdown Switch
HP E1135C POWER DISTRIBUTION UNIT Rev. C
16
NOTE

6); otherwise, the outputs cannot be turned on.