Helios Large Display Dual Analog Input Rate/Totalizer Instruction Manual
PD2-6262
14
Signal Connections
Signal connections are made to a nine-terminal connector labeled SIGNAL on Figure 7. The COM (common)
terminals are the return for the 4-20 mA and the
10 V input signals. The two COM terminals connect to the same
common return, and are not isolated.
Current and Voltage Connections
The following figures show examples of current and voltage connections.
There are no switches or jumpers to set up for current and voltage inputs. Setup and programming is performed through
the front panel buttons.
Figure 9. Transmitters Powered by Internal Supply
Figure 10. Transmitter Powered by Ext. Supply or Self-Powered
The current input is protected against current overload by a resettable fuse. The display may or may not show a fault
condition depending on the nature of the overload.
The fuse limits the current to a safe level when it detects a fault condition, and automatically resets itself when the
fault condition is removed.
Figure 11. Voltage Input Connections
The meter is capable of accepting any voltage from -10 VDC to +10 VDC.
