Installation 
12  UDC3500 Universal Digital Controller Product Manual  3/07 
Figure 2-22 Ethernet Communications Option 
Figure 2-23 Digital Inputs 
Figure 2-24 Optional Electromechanical Relay Outputs 
Figure 2-25 Transmitter Power for 4-20 mA — 2 wire 
Transmitter Using Open Collector Output 
Figure 2-26 Transmitter Power for 4-20 mA — 2 Wire 
Transmitter Using Second Current Output 
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