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3. Technical description
3.5 Communication devices
The uninterrupted power supply units of the UPS Archimod® type have, for each control board:
2 RS232 serial ports, 1 relay interface, 1 logic level output on a female DB15 connector and an SNMP slot.
If there are several control boards they provide the same redundant information.
ATTENTION
To ensure operator safety it is mandatory for the interfaces to be connected so that:
- the maximum voltage between any two conductors connected to the interface and between either of these two
conductors and earth is less than a peak 42V or less than 60Vdc;
- the insulation voltage between any conductor connected to the interface and earth is at least 1500Vac
3.5.1 R S232 serial ports
The first of the 2 RS232 serial ports that are on each of the UPS control boards is called "maintenance Interface"; it is
located in the middle of the front control panel between the display and keypad.
It is dedicated exclusively to diagnostic functions and machine firmware upgrades.
The second, called "user interface" is at the back of the UPS. Thanks to this port a whole set of data on UPS operation can
be accessed by means of a computer or network board besides being able to control the unmanned switching off of the
operating system.
3.5.2 R elay interface/E.P.O.
The relay interface contacts are programmed by default as Normally Open (NO) but can be configured as Normally Closed
(NC) via the UPS control panel and display. There is also an input for the E.P.O. function.
The indications available with this interface are:
• running on battery
• autonomy reserve
• generic alarm
• overload
• UPS running on bypass
Electrical specifications/contact interface
The indications available with relay interface are
• V
= 250VAC - 30VDC, I
MAX
E.P.O. input
Voltage with open contacts 12VDC, current with closed contacts 5mA.
Description of the contacts' interface PINs:
G
H
20
®
= 5A
MAX
PIN
1 -2
Running on battery
3 - 4
Autonomy Reserve
5 - 6
Generic alarm
7 - 8
PIN
1 -2
Running on Bypass
3 - 4
5 - 6
FUNCTION
Overload
FUNCTION
E.P.O.
-
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