Page 12
Optima 820 Series
the switched outlets even if the main breaker is switched on, and even if the internal software-controlled relays are
switched on.
•
Remote
(down position) will behave like
Off
when there is no panel connected.
If there will not be a remote On/Off/EPO panel connected to the PDU, switch the
Remote Override
mode switch to the up position labeled
EPO Only
. This is the normal operating position for any unit
with no remote panel. (The other positions will prevent power from getting to the outlets.)
Whether there is a remote control panel connected or not, toggling the
Remote Override
mode
switch to the center position labeled
Off
will disconnect power to all switched outlets. The utility
outlets will continue to be powered.
3.4.2 Remote Bus Connector
There are a total of four connectors, but note that there are two types of connectors. Based on the label of the top pin,
we call the two types the standard “enable” type, and the alternative “delay” type. There are three of the standard type (2
front, 1 back), and one of the delay type (on the back).
Multiple PDUs can be wired in a daisy-chain fashion to be operated by a single remote panel.
The standard enable connectors are J20, J21, J22. These are all wired in parallel.
The delay connector is J23. When used, the On signal from the remote panel is delayed by about 2 seconds.
J 22
Enable
Disable
Return
J 15
(Main)
J 13
(CB 4)
J 14
(CB 5)
Choice of
twist-lock
Choice of
twist-lock
J 23
Delay
Disable
Return
J 4
(CB 1)
J 8
(CB 2)
J 12
(CB 3)
J 1
J 5
J 9
Input
J 22
Enable
Disable
Return
J 15
(Main)
J 13
(CB 4)
J 14
(CB 5)
Choice of
twist-lock
Choice of
twist-lock
J 23
Delay
Disable
Return
J 4
(CB 1)
J 8
(CB 2)
J 12
(CB 3)
J 1
J 5
J 9
Input
J 22
J 23
Enable
Disable
Return
Delay
Disable
Return
J 17
J 1
J 4
(CB 1)
J 13
(CB 4)
J 15
J 14
J 16
J 8
(CB 2)
J12
(CB 3)
J 5
J 9
J 18
(CB 5)
J 22
J 23
Enable
Disable
Return
Delay
Disable
Return
J 17
J 1
J 4
(CB 1)
J 13
(CB 4)
J 15
J 14
J 16
J 8
(CB 2)
J12
(CB 3)
J 5
J 9
J 18
(CB 5)
Enable
Disable
Return
Enable
Return
Outlet Control Bus
J1
J2
J4
J5
J3
Remote EPO Input
Outlet Control Bus
Au
x 2
Marway Commander UCP 5000 Remote EPO
Using the “Enable” connectors, each PDU receives the On signal at the same time.
Using the “Delay” connector to connect to the second PDU, the second PDU will receive
the On signal approximately 2 seconds after the first PDU.
Enable
Disable
Return
Enable
Return
Outlet Control Bus
J1
J2
J4
J5
J3
Remote EPO Input
Outlet Control Bus
Au
x 2
3.4.2.1 Remote Bus Connector Wiring
The 3-pin connectors use two low-voltage signals as follows:
•
Shorting the
Enable
pin to the
Return
pin with a dry contact will trigger the remote bus Enable signal.
•
Shorting the
Disable
pin to the
Return
pin with a dry contact will trigger the remote bus Disable signal.
•
Note that the Disable signal has priority, so that if both signals are triggered at the same time, the net result will be
Disable.
For additional information about Marway’s Commander UCP remote panel, visit the web site at