Configurable logicConfigurable Logic is a powerful tool since it providesthe user with the means to configure general logicequations. These logic equations can be used to performdiscrete SCADA functions, modify control function, or addcommunications data points. Configurable Logic mustbe configured via the digital communications software,ProView NXG software.Control functions codes can be used to enable configurablelogic. See the information contained in Table 10 for FC 700-703 more information on this functionality.See document MN225015EN CL-7 Regulator ControlProView NXG Software Programming Guide for moreinformation on programming configurable logic.Figure 51 Optional I/O contact module connectorAuxiliary input and outputUp to two auxiliary I/O Modules can be added as options tothe CL-7 control (Figure 51). The modules enable connectionof contact-type input devices (switches, relays) and discreteindicating devices (relays, LEDs, lamps) to the control toeffect local discrete inputs and outputs. The I/O moduleaccessories can be used to supplement normal local controland status indicators.Each contact I/O module option contains four (4) inputsand four (4) outputs. When added to a control, the modulesrequire configuration to assign functionality to the inputand output contacts. The module must also be mapped forthe control to recognize it. Use ProView NXG software toconfigure logic and map the module. Refer to documentMN225015EN, CL-7 Regulator Control ProView NXGSoftware Programming Guide for additional information onconfiguring the control and control logic.The user can program the CL-7 control to use the discreteinput states, as well as other internal logic conditions, todetermine the operation of the control. Likewise, the usercan program the CL-7 control to toggle the discrete outputstates based on internal control logic.The input contacts can be activate using an ac or dc voltage;see Table 12, Contact I/O Option Module Input Ratingsfor more information on input activation limits. A whettingvoltage can be supplied from the control; the whettingvoltage connection can be made at terminal V9 on thelower terminal board on the back panel. See Figure 52 forconnection recommendations.Output contacts 1 and 2 on the Contact I/O outputs areForm A (single-pole normally open) relay contacts; outputcontacts 3 and 4 are Form C (single-pole, double throw NO/NC) relay contacts. All four outputs are non-latching type.Refer to Table 13 for output fusing recommendations.ote:N Latching is defined as an output that retains itsstatus when control power is removed. Non-latchingis defined as an output that returns to a defaultstatus when control power is removed.ote:N Following a firmware upgrade the Contact I/Omodule output relays will revert to the de-energizedstate. Additionally, the Contact I/O module may needto be remapped.NOTICEEquipment damage; misoperation External leads mustbe shielded and the shield must be grounded at bothends Terminate each lead with a 320 Vac, 160 Joulesmetal oxide varistor (MOV), or equivalent, at the remoteend Attach MOVs between the leads and groundFailure to properly shield and protect leads can result inequipment damage and/or unintentional operation149INSTALLATION, OPERATION, AND MAINTENANCE INSTRUCTIONS MN225003EN April 2018CL-7 Voltage Regulator Control