ATEIS UAPg2 - Manual (Page 17)

UAPG2 MANUAL
Version EN.24
17
5) ETHERNET LED
Light when the UAPG2 is connected (on-line) to TCP/IP network.
6) STANDBY BUTTON
Activates standby mode
REAR PANEL
1) POWER SECTION
Insert provided power cable first into UAPG2 then in the wall power connector.
Power switch:
•
| (engaged) = ON;
•
O (engaged) = OFF
2) 24 V POWER SUPPLY (BACKUP) CONNECTORS
You can power up the UAPG2 with a 24VDC power supply (for backup battery powering).
3) RS485 CONNECTORS
Here starts the RS485 network (connection for PPM and/or URC):
•
Power: + and –
•
DATA: A and B
The RS485 port at the rear side of the unit is used for additional units like the URC (Universal Remote
Controller) or the PPM (Programmable Paging Microphone).
Note: The maximum cable length depends on the type of cable used and should not exceed 300 m
with standard CAT5.
This restriction is mostly due to supply voltage drops with low wire gauge in longer cable runs
and can be obviated by using external power supplies (Junction Box) or higer diameter cables.
However, we have seen data cable lengths up to 850m working just fine. You will have to put
external power every three remote devices (PPM or URC) or every 300m.
Note: It is recommended to not put more than 8 remote devices (PPM and/or URC) on one UAPG2.
You can of course use more remote devices (UAPG2 can manage up to 16 PPMs), but this
increase the response time of the devices and you will have to be very carefull in the wiring by
adding external power supply.