Rockwell Automation 1770-HT8 SMART TRANSMITTER - Manual (Page 39)

Installing the Smart Transmitter Interface
Products
Chapter 2
2-14
Figure 2.12
Connecting HART Field Devices to the Terminal Block
90021
1 2 SH 1 2 SH 1 2 SH 1 2 SH
CH 1 CH 2 CH 3 CH 4 CH 5 C
+ -
12 position COMBICON connector
on Terminal Block
12 position COMBICON plug
From HART Field Devices
Point-to-point Connection
A point-to-point connection exists when only one HART field device is
connected to any particular Terminal Block channel. This arrangement
allows the transmission of both analog and digital data to and from the
HART field device.
Multidrop Connection
A maximum of 15 HART field devices can be connected to each channel
on the Terminal Block in a multidrop network. A multidrop connection
supplies only digital data through the Terminal Block. See Figure 1.10 and
Figure 2.13 for illustrations of both point-to-point and multidrop
connections.
Any channel on the Terminal Block can be used for either point-to-point or
multidrop networking, and the same Terminal Block can support both at
the same time without any special settings or configuration of the
hardware.