Distech Controls ECL/ECB-PTU Series User Manual page 15

Table 1: Common Identification Labels for BACnet MS/TP Data Bus Polarity for Distech Controls' Products
Distech Controls Product
BACnet/IP to MS/TP Adapter
BACnet/IP to MS/TP Router
Except for an EC-BOS and ECB-PTU Line-Powered Controllers, never connect the
shield of the BACnet MS/TP data bus to the Reference terminal. See
Shield Grounding Requirements
Table 2: Common Identification Labels for BACnet MS/TP Data Bus Polarity for other Manufacturers
Device Manufacturer
Common identification labels
for BACnet MS/TP data bus
polarity by other Manufactur-
ers
When interfacing with BACnet MS/TP devices from other manufacturers, refer to
the documentation provided with the device to correctly wire the device.
Network Guide
BACnet MS/TP Communication Data Bus Fundamentals
Typical Data Bus Connection Terminals
Inverting
RT-
-
on page 24 for more information.
Typical Data Bus Connection Terminal
Inverting Non-inverting
B A
- +
TxD-/RxD- TxD+/RxD+
U- U+
RT- RT+
Sig- Sig+
Data- Data+
Non-inverting Reference
RT+ COM
+ SC
Reference
SC
G
GND
COM
REF
Data Bus
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