3-10 L60 Line Phase Comparison Relay GE Multilin3.2 WIRING 3 HARDWARE33.2.5 CONTACT INPUTS/OUTPUTSEvery digital input/output module has 24 terminal connections. They are arranged as three terminals per row, with eightrows in total. A given row of three terminals may be used for the outputs of one relay. For example, for Form-C relay out-puts, the terminals connect to the normally open (NO), normally closed (NC), and common contacts of the relay. For aForm-A output, there are options of using current or voltage detection for feature supervision, depending on the moduleordered. The terminal configuration for contact inputs is different for the two applications.The digital inputs are grouped with a common return. The L60 has two versions of grouping: four inputs per common returnand two inputs per common return. When a digital input/output module is ordered, four inputs per common is used. The fourinputs per common allows for high-density inputs in combination with outputs, with a compromise of four inputs sharing onecommon. If the inputs must be isolated per row, then two inputs per common return should be selected (4D module).The tables and diagrams on the following pages illustrate the module types (6A, etc.) and contact arrangements that maybe ordered for the relay. Since an entire row is used for a single contact output, the name is assigned using the module slotposition and row number. However, since there are two contact inputs per row, these names are assigned by module slotposition, row number, and column position.UR-SERIES FORM-A / SOLID STATE (SSR) OUTPUT CONTACTS:Some Form-A/SSR outputs include circuits to monitor the DC voltage across the output contact when it is open, and the DCcurrent through the output contact when it is closed. Each of the monitors contains a level detector whose output is set tologic “On = 1” when the current in the circuit is above the threshold setting. The voltage monitor is set to “On = 1” when thecurrent is above about 1 to 2.5 mA, and the current monitor is set to “On = 1” when the current exceeds about 80 to 100mA. The voltage monitor is intended to check the health of the overall trip circuit, and the current monitor can be used toseal-in the output contact until an external contact has interrupted current flow. The block diagrams of the circuits are belowabove for the Form-A outputs with:a) optional voltage monitorb) optional current monitorc) with no monitoringFigure 3–12: FORM-A /SOLID STATE CONTACT FUNCTIONSLoadI~#a~#b~#cIf Idc 1mA, Cont Op x Vonotherwise Cont Op x VoffV~827821A5.CDR+++++-----a) Voltage with optionalcurrent monitoringVoltage monitoring onlyLoadIVBoth voltage and current monitoringIf Idc 80mA, Cont Op x Ionotherwise Cont Op x Ioff~If Idc 1mA, Cont Op x Vonotherwise Cont Op x Voff~LoadIVb) Current with optionalvoltage monitoring Current monitoring only Both voltage and current monitoring(external jumper a-b is required)If Idc 80mA, Cont Op x Ionotherwise Cont Op x Ioff~LoadIVIf Idc 80mA, Cont Op x Ionotherwise Cont Op x Ioff~If Idc 1mA, Cont Op x Vonotherwise Cont Op x Voff~Loadc) No monitoring~#a~#b~#c~#a~#b~#c~#a~#b~#c~#a~#b~#c
