General Description 
MAN0996_Iss 1_02/16    Touchpoint Plus 
Pt. No. 3011M5044_EN  19  User Guide 
3.3.2 TPPL Expansion Unit 
This figure shows the building blocks of the Touchpoint Plus Expansion Unit. 
 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 11. Expansion Unit Layout Before Installation 
1 
No Touchscreen 
9 
Battery Connector 
2 
No SD Card 
10 
mA Output Modules 
3 
No Motherboard 
11 
Relay Output Modules 
4 
No Modbus Terminals 
12 
Main Module (Power and CAN only) 
5 
No Ethernet Connector 
13 
Input Module (Dual shown) 
6 
Switched Mode Power Supply 
14 
Backup Battery 
7 
DIP Switch (on backplane)* 
15 
Power Terminal 
8 
Battery On / Off Switch 
16 
Earth (Ground) Bus Bar 
 
3.3.3 TPPL DIP Switches 
TPPL Backplanes have a DIP switch (item 14 in the figures above) that controls the interaction between the master (basic) 
and the optional expansion unit backplanes. Once set these DIP switches need not be altered. 
 
     
Basic Unit 
Both On 
Basic Unit with Slave 
1 On, 2 Off 
Expansion Unit 
1 Off, 2 On 
Figure 12. Backplane DIP Switch Settings