Rockwell Automation 1770-HT8 SMART TRANSMITTER - Manual (Page 30)

Installing the Smart Transmitter Interface
Products
Chapter 2
2-5
Linear Connection
For linear connection the cables go from the 17 pin connector on the
Communications Controller to the connector on the first Terminal Block.
Another cable of the same kind leads from the connector on the first
Terminal Block to the connector on the second Terminal Block, from there
to the connector on the third Terminal Block, and so on.
Figure 2.3
Example 1: Linear Connection
90031
1770ĆHT8
1770 Ć HT1
+ -
1770ĆHT16
1770ĆHT8
b
c
a
+ -
+ -
+ -
Example 1 assumes that the modules (HT1, HT16 and two HT8’s) are
installed in separate cabinets. The maximum cable lengths allowed for the
setup shown in this example are given in the table below.
Cable Size Cable a Cable b Cable c
Belden # 85168 250 ft 250 ft 250 ft
If you are using a linear arrangement, the connector at the
Communications Controller will have one set of 17 wires leading out of it.
The connector at each Terminal Block (except the last one) will have two
sets of wires in the same holes: the one coming from the previous
connection, (either the Communications Controller or the previous
Terminal Block), and the one leading to the next Terminal Block.