9.
Return the control loop to automatic control.
6.2
Additional loops
There are three additional loop connections available on the Transmitter:
•
Pulse output - used for external or remote totalization.
•
Channel 1 can be configured as discrete input or discrete output.
•
Channel 2 can be configured as discrete output only.
6.2.1
Connect pulse output
The pulse output function provides a galvanically isolated frequency signal that is
proportional to the flow through the sensor. The signal is typically used in conjunction with
an external totalizer or control system. The default position of the internal/external pulse
power switch is in the EXTERNAL position. The user-selectable power switch is located on
the electronics board.
External
For transmitters with the internal/external pulse power switch (output option code A) set
in the EXTERNAL position or transmitters with intrinsically safe outputs (output option
code B) the following requirements apply:
•
Supply voltage: 5 to 28 VDC
•
Maximum current: 100 mA
•
Maximum power: 1.0 W
•
Load resistance: 200 to 10k Ohms (typical value 1k Ohms). Refer to the figure
indicated:
Output option code
Supply voltage
Resistance vs cable length
A
5-28 VDC
See
B
5 VDC
See
B
12 VDC
See
B
24 VDC
See
•
Pulse mode: Fixed pulse width or 50% duty cycle
•
Pulse duration: 0.1 to 650 ms (adjustable)
•
Maximum pulse frequency:
-
Output option code A is 10,000 Hz
-
Output option code B is 5000 Hz
•
FET switch closure: solid state switch
Advanced installation details
52
Rosemount
®
8732EM Transmitter with HART Protocol Reference Manual
Summary of Contents for Rosemount 8732EM
Page 2: ......
Page 6: ...Contents iv Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 10: ...Safety messages 4 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 14: ...Introduction 8 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 30: ...Sensor Installation 24 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 92: ...Operation 86 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 158: ...Maintenance 152 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 214: ...Product Certifications 208 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 217: ...Wiring 8732EM using combination cable Figure C 2 Wiring Diagrams Reference manual 211 ...
Page 222: ...Wiring Diagrams 216 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 253: ...Implementing a Universal Transmitter Reference manual 247 ...