Point-to-Point Connections
The BMEAHI0812 eX80 HART analog input module supports point-to-point 4-20 mA wiring connections to field instruments, including sensors and transmitters. You can make the connection to the input module using a 20-pin terminal block (BMX FTB 20•0), a pre-assembled cord set (BMX FTW •01S), or TELEFAST accessories.
The input module does not provide 4-20 mA current loop power. You need to include an external power supply in your network that can provide current loop power.
The BMEAHI0812 eX80 HART analog input module present the following 20-pin design, to which you can connect a terminal block, a pre-assembled cord set, or TELEFAST cable:
BMEAHI0812 with 2-Wire Transmitter
The following illustration shows you how to connect the input module to a 2-wire transmitter. Field power is supplied directly to the 4-20 mA current loop:
1
2-wire transmitter
2
4-20 mA current loop, with arrows indicating direction of current flow
3
Field power supply
4
Protective ground
5
Secondary HART master (hand-held)
BMEAHI0812 with 4-Wire Transmitter
This example illustrates how to connect the input module to a 4-wire transmitter. Field power is provided to the 4-20 mA current loop via the transmitter:
1
4-wire transmitter
2
4-20 mA current loop, with arrows indicating direction of current flow
3
Field power supply
4
Protective ground
5
Secondary HART master (hand-held) 
