LEFM 3xxCi User Manual
IB1406 Rev 12
Section 5
Page 30
August 2017
Figure 4.6 Typical Analog Input
Analog Outputs(Terminal Block 2) – Recommended 16 to 28 AWG wire
TB2 contains the transmitter’s analog outputs, described below in Table 4.3. A typical schematic for the
analog outputs, including a depiction of the terminal block 2 configuration, is shown below in Figure 4.7.
Table 4.3 Analog Outputs (User 2)
Analog Output 1
TB2, Pin 9
4 to 20 mA (+)
TB2, Pin 10
4 to 20 mA (-)
TB2, Pin 11
Ground
Analog Output 2
TB2, Pin 25
4 to 20 mA (+)
TB2, Pin 26
4 to 20 mA (-)
TB2, Pin 27
Ground
Figure 4.7 Typical Analog Output
Optional HART (Terminal Block 2) – Recommended 16 to 28 AWG wire
TB2 contains the transmitter’s analog outputs, described below in Table 4.3. A typical schematic for the
analog outputs, including a depiction of the terminal block 2 configuration, is shown below in Error!
Reference source not found.7. Note that HART bus connections are made to the Analog Output 2
terminals. Hart does not interfere with the analog function.
Table 4.4 Optional HART Output
HART
TB2, Pin 25
4 to 20 mA (+)
TB2, Pin 26
4 to 20 mA (-)
TB2, Pin 27
Ground
Digital Outputs (Terminal Block 2) – Recommended 16 to 28 AWG wire
TB2 contains the transmitter’s digital outputs, described below in Table 4.. The voltages, +V, for the digital
signals are active, selectable as either 5 volts or 12 volts, and electrically isolated. The output impedance is
249 ohms. These outputs are intended for high-impedance (1 MΩ) devices.
Pulse B can be configured to indicate volume or flow direction. The desired function is selected by a
Modbus register. Refer to either the Modbus manual or the LEFMLink manual for changing parameters.
