Ms/Tp 2 Wire Segment; Shield Continuity And Termination - Delta Controls DZNR-768 Installation Manual

Network layout

MS/TP 2 WIRE segment

When using a MS/TP 2 WIRE port for twisted pair wiring, follow the wiring conventions
described in the Delta Controls Wiring and installation Guidelines document. The guidelines
include the following cable specifications:
22-24 AWG twisted pair
•
100-120 ohms impedance
•
17 pF/ft or lower capacitance
•
Braided or aluminum foil shield
•
Wire the controllers on the segment in a daisy-chain fashion. Attempting to connect them
using a starred or bus configuration will cause problems on the segment. The maximum
length for each MS/TP 2 wire segment is 4000 ft (1220 m).

Shield continuity and termination

For MS/TP 2 WIRE segments, the shield must be continuous from node to node and be
terminated as shown in the diagram found here:
Do not connect the shield to the ground lug.
Page 16 of 28
Data wires termination jumpers
DZNR-768 Revision 1.2 Installation Guide
Document Edition 1.5