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Reference Manual
00809-0100-4444, Rev AC
Section 3: Advanced Installation Details
January 2015
Advanced Installation Details
3.4.3 Connect discrete input
The discrete input can provide positive zero return (PZR) or net totalizer reset. The following
requirements apply:
Supply Voltage: 5 to 28 VDC
Control Current: 1.5 - 20mA
Input Impedance: 2.5 k plus 1.2V Diode drop. See Figure 3-11.
To connect the discrete input, complete the following steps.
1. Ensure the power source and connecting cable meet the requirements outlined
previously.
2. Turn off the transmitter and discrete power sources.
3. Run the power cable to the transmitter.
4. Connect -DC to terminal 5.
5. Connect +DC to terminal 6.
Refer to Figure 3-10 and Figure 3-11.
Figure 3-10. Connecting Discrete Input
Relay Contact or Control
System Output
5-28 V DC
Power Supply