Alpha Technologies Micro, Micro XL, Micro XL3 UPS - Manual (Page 13)

11 017-237-B0 Rev A
C1: The C1 contact is energized when line power is unqualified and the Alpha Micro provides backup battery
power to the load(s). It can be called the “On Battery” contact.
C2, C3:
These contacts are energized when the battery drops below a pre-set voltage level. They can be called
the “Low Battery” contacts. You can change the pre-programmed level to match the batteries used and the ac-
tual operating conditions. See “Operating the Alpha Micro “#35 Low Battery Warning Voltage”.
C4:
This contact is energized after the Alpha Micro has been in Inverter mode for 2 hours. It can be called the
“Timer” contact.
You can change the pre-programmed 2 hours to match your operating conditions. See “Programming the Dry
Contacts and the Clock, Setting the Timer Contact”.
C5:
The C5 contact is energized when the Alpha Micro is operating close to the specified limits. It can be called
the “Alarm” contact.
+48VDC, 500mA or
+24VDC, 500mA from
the batteries.
Microprocessor
18 16 17
+
Contact
C6
Figure 6 — Contact Layout (Standard for C1 to C5, Factory Option for C6)
The contacts have a
maximum rating of
1A at 250V.
Microprocessor
UPS
Interior
Normally
Closed (NC)
Normally
Open (NO)
Common (C)
Figure 7 — 48 VDC / 24 VDC Contact Layout (De-energized Shown, Factory Default for C6)
11
Dry Contacts C1 to C6
Contacts C1 to C5 allow the Alpha Micro to be connected to an external monitoring panel or to traffic control
equipment.
The factory default settings can be reprogrammed to meet your requirements. See “Programming the Dry Con-
tacts and the Clock” and “Alpha UPS Monitor, Operations, Relay and Load Shed”.
For Contact C6, the factory default layout for this contact is a relay that is energized when the Alpha Micro is
in Line or Inverter modes. It provides 48 VDC (500 mA) or 24 VDC (500 mA) from the external batteries to an
external fan or other equipment. It can be factory-configured as a dry contact if requested. Figure 6 shows the
contact’s layout while Figure 7 shows the +48 VDC or +24 VDC terminal block layout.