ACL CSC400 Installation And Operation Manual
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514-20mA Input Connection Notes for Rev 1D CSC400 BoardsThe CSC400 Rev 1D board changes how the 4-20mA inputs and outputs are powered. The CSC400 Rev 1D board provides ashared 12-24VDC power switch with a combined maximum output current of 1A for all 4-20mA Inputs and Outputs. Theprovided input voltage (eg: 12VDC or 24VDC) will be the same voltage on the power output terminals for the 4-20mA Inputs(terminals 10 and 12) and the same voltage supplied to the two sets of 4-20mA Output circuitry.Figure 13 - CSC400 4-20mA Input Connections Wiring Diagram Examples4-20mA Input DIP SwitchesThere are 4 DIP switches for each 4-20mA Input. They select the inline (series) resistor added to each 12/24V Output(terminals 10 and 12). A DIP switch is "On" when it is moved to the right side (towards the "Local Mount of the IgnitionModule" area). The inline resistance options are present to assist with 4-20mA Input impedance adjustments and for possibleHART communication devices. DIP Switches labeled "1:" correspond to "Level Input (1)". DIP Switches labeled "2:"correspond to "Pressure Input (2)". Operation of each 4-20mA Input is identical regardless of the "Level" or "Pressure" label.Number of DIP Switches On Resulting Inline Series ResistanceAll DIP Switches Off 249 ohms1 of top three DIP switches "On" 124.5 ohms2 of top three DIP switches "On" 83 ohms3 of top three DIP switches "On" 62 ohms"Short" DIP switch "On" 0 ohms: All external resistors are bypassed, shorting the internal 12/24V powersupply output to the terminal(s) (10 and 12) directly |
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