Px3Ts Latching Relay Behavior; Options For Outlet State On Startup - Raritan PX3TS User Manual

Chapter 6: Using the Web Interface
136

PX3TS Latching Relay Behavior

PX3TS incorporates latching relays in models with outlet switching.
Unlike non-latching relays, latching relays do NOT require power to keep
their contacts closed.
PX3TS outlet switching can be configured to operate as a true latching
relay or to simulate a non-latching relay. The operating mode
determines the latching relay behavior when PDU power is lost.
Regardless of which mode is selected, power is not required to keep
relay contacts closed.
Non-Latching Mode:
Relay always opens when power is lost. This insures all relays are
•
open when power is applied to the PDU.
Always select this mode if the combined in-rush current of the
•
devices connected to the PDU trip circuit breakers when power is
applied to the PDU.
This is the factory default operating mode.
•
Latching Mode:
• Relay does not open when power is lost.
This is the preferred operating mode ONLY if you are sure in-rush
•
current does not trip circuit breakers when power is applied to the
PDU.
Power to the outlet is not disrupted if a PDU internal failure occurs.
•
• In Latching mode, the following features are disabled.
PDU-level outlet state on startup: See

Outlet-level outlet state on startup: See

(on page 152).
PDU-level outlet initialization delay on startup: See

130).

Options for Outlet State on Startup

The following are available options for initial power states of outlets after
powering up the PX3TS device.
Option Function
on Turns on the outlet(s).
off Turns off the outlet(s).
last known Restores the outlet(s) to the previous power state(s)
before the PX3TS was powered off.
PDU
(on page 130).
Individual Outlet Pages
PDU
(on page