3-3

MN1373

Figure 3-3 Current Signal Input Connection

4-20mA DC Signal Input:

No resistor required. Set Jumper J1 in “CUR” position.

10-50mA DC Signal Input (Use Large Resistor with Color Code “Brown-Green-Brown”):

Install the 150Ω - 1W resistor across Terminals “5” and “6”. Set Jumper J1 in“CUR” position.

1-5mA DC Signal Input (Use Small Resistor with Color Code “Brown-Black-Red”):

Install the 1kΩ - 1/4W resistor across Terminals “5” and “6”. Set Jumper J1 in “VOLT” position.

Procedure to Calibrate the Signal Isolator When Using Current Signal Input:

1. Connect a DC voltmeter (a digital voltmeter is suggested) to Terminals “9” (-) and“10” (+).

2. Apply the minimum signal input current to Terminals “5” (-) and “6” (+).

3. Adjust the MIN Trimpot on the Signal Isolator to obtain an output voltage of 0VDC.

4. Apply the maximum signal input current to Terminals “5” (-) and “6” (+).

5. Adjust the MAX Trimpot on the Signal Isolator to obtain an output voltage of 9VDC.