Rockwell Automation 1770-HT8 SMART TRANSMITTER - Manual (Page 14)

Introducing the Smart Transmitter
Interface
Chapter 1
1-3
1770ĆHT8/16 Terminal Block
The Terminal Blocks pass both analog and digital signals to and from the
HART field devices. The analog signal is passed on to devices such as the
Allen-Bradley 1771-IFE Analog I/O module. The digital signal is routed to
the Communications Controller.
Each Terminal Block provides either 8 (1770-HT8) or 16 (1770-HT16)
channels. Each channel has connection points for HART field devices and
Analog I/O modules, loop fuses and loop power selection jumpers. Any
combination of 8 and 16 channel Terminal Blocks can be used to make up
the 32 channel maximum. The board address jumpers (see Figure 1.2 and
Figure 1.3) indicate to the Communications Controller which set of
channels a particular Terminal Block will use. These are set when the
Terminal Block is installed (see Chapter 2).
Figure 1.2
1770ĆHT8 8 Channel Terminal Block
90018
Board Selected LED
Connection to Communications
Controller or other Terminal Blocks
Board Address
Jumpers
Analog I/O Module
Connector
1 2 SH 1 2 SH 1 2 SH 1 2 SH
1
1 2 3 4 5 6 7 8 RTN SH
CH 1 CH 2 CH 3 CH 4
Loop
Power
LED
Power Fuse Power Connector
E D
1 2 SH 1 2 SH 1 2 SH 1 2 SH
CH 5 CH 6 CH 7 CH 8
Jumpers to select Loop Power
HART Transmitters -
Connectors
Loop Fuses
8 CHANNEL
TERMINAL BLOCK
17
+ -
Loop Power
CATALOG NO. 1770-HT8 VOLTS 24 VDC
HT1/HT8/HT16 INTERCONNECT
JP1
E D
JP1 JP1
E D
JP1
E D E D
JP1
E D
JP1 JP1
E D
JP1
E D
User writeable area