Optional Expansion Unit Connection - Honeywell Touchpoint Plus Technical Handbook

5.2.4 Optional Expansion Unit Connection

In general, the expansion unit should have the same cabling and similar power requirements as the Controller:
• Power cable: 2-core plus Earth
• CAN cable <10 metres (32.8 Ft) using 0.2 to 2 mm
equivalent)
• Shielded signal cables
•
Avoid Earth (Ground) loops
The SMPS can deliver 150 W maximum, however a basic unit and an expansion unit each need 107 W so must be
wired as shown below when using AC Mains input.
Touchpoint Plus Controller
AC Line
AC Common
F-Ground
-V DC
-V DC
+24 VDC
+24 VDC
Note: The SMPS is attached to chassis ground and does not need a separate ground connection.
Note: The Main and Expansion Unit power cables should be matched in type and rating.
MAN0984_Iss 4_01/19
Pt. No. 3011M5001
Electrical Power Connection and Interfacing
Ground Bus Bar
Connecting the Touchpoint Plus and Optional Expansion Unit to a Mains Supply
/ 14 24 AWG shielded twisted pair cable (Belden #9841 or
2
Optional Expansion Unit
AC Line
AC Common
F-Ground
-V DC
-V DC
+24 VDC
+24 VDC
34
Ground Bus Bar
Touchpoint Plus
Technical Handbook