Input/Output Options; Real-Time Clock Protection - Honeywell MPA2 Installation Manual

2.3 MPA2 Access Control Unit
The MPA2 panel is a one and two-door access control unit. The following
table shows the MPA2 input/output options:
Table 3 MPA2 Input/Output Options
{
Future
Development
You can use the MPA2 panel as a standalone panel with independent card
and transaction storage or, with a host software upgrade, as a fully
monitored Online access control device.
Panel inputs are capable of four state supervision: Normal, Alarm, Short
and Cut. One input is used for door status on each door. Inputs for Reader
Tampers are supplied as well. They can also be used as additional inputs
when not required for their default purpose. Non-supervised inputs are
used for Request to Exit button on each door.
For MPA2 reader specifications, see
Note:
54.

2.3.1 Real-Time Clock Protection

The panel RTC is backed up using a super capacitor. The super capacitor
will power the real-time clock for approximately 60 minutes in the absence
of primary power or backup battery.
MPA2 Access Control Unit Installation Guide, Document 800-25395 - B
Installing the MPA2 Panels
Panel Components and Descriptions
Hardware Specifications, page
9