INTRODUCTION 
Part. No. 2400M2501_6    Touchpoint Pro 
  22  Technical Handbook 
3.4.3  DC Uninterruptible Power Supply (DC-UPS) Module 
The DC-UPS Module can be used with the separate and optional TPPR Battery Enclosure to provide continuous and 
uninterrupted power to the TPPR in the event of an external power failure. 
The DC-UPS is adjustable for buffer time and buffer voltage, and carries red, yellow and green status LEDs and descriptions 
that show your backup battery status (see tables below). 
Note: The DC-UPS Module Buffer Voltage should be set at 26 VDC to ensure optimum battery charging, and the Buffer-time 
Limiter should usually be set to ∞ (see circled area on the figure below). 
 
 
 
 
 
 
 
 
 
 
Figure 29.  DC-UPS and Battery Configuration 
 
The DC-UPS terminals are as follows: 
–24 VDC input from UPS (spare) 
+24 VDC output to 20 A (max) Load 
–24 VDC output to 20 A (max) Load 
Table 4.  DC-UPS Primary Terminal Allocation 
 
The DC-UPS also has Normally Open (NO) relay terminals that can be used for external repeaters such as a lamp stack or 
alarm buzzer, as shown in the table below: 
Ready relay: Closed when all is Ok (green) 
Buffering relay: Closed when batteries are supplying power (yellow or buzzer) 
Replace Battery relay: Closed when batteries fail load test (red or buzzer) 
Do not use as Inhibit belongs to the Controller only 
Table 5.  DC-UPS Secondary Terminal Allocation 
 
20 A max 
Load 
12 VDC 
Battery 
12 VDC 
Battery 
24 VDC  24 VDC