Revisions: IC660BBD110A , IC660BBD110B , IC660BBD110C , IC660BBD110D , IC660BBD110E , IC660BBD110F , IC660BBD110G , IC660BBD110H , IC660BBD110I , IC660BBD110J , IC660BBD110K , IC660BBD110L , IC660BBD110M , IC660BBD110N , IC660BBD110O , IC660BBD110P , IC660BBD110Q , IC660BBD110R , IC660BBD110S , IC660BBD110T , IC660BBD110U , IC660BBD110V , IC660BBD110W , IC660BBD110X , IC660BBD110Y , IC660BBD110Z ,
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The 115 VAC 16 Circuit Input Block (IC660BBD110) has sixteen discrete input circuits in two banks of eight circuits each. Typical inputs are contact closures from switches, pushbuttons, or limit switches. The block can be used with both 2 wire and 3 wire proximity switch inputs. Control power for the block comes from the power line that supplies the inputs. No separate block power supply is needed. Features The block provides: Separate On/Off thresholds for each group of 8 inputs. On/Off thresholds are configurable from 25% to 85% of the incoming line voltage, allowing the use of a wide variety of input sensors. Optional Open Wire detection is selectable for individual inputs. The Open/Off threshold is configurable from 25% to 85% of the incoming line voltage. Separate Open/Off thresholds can be selected for each group of 8 inputs. Optional Short Circuit detection at 10% and 90% of the incoming line voltage can be selected for individual inputs. Fault reporting can be enabled or disabled circuit by circuit. Block LEDs verify proper block operation and CPU communications. Compatibility A 115VAC 16 Circuit Input block is designed for use with Hand held Monitor version IC660HHM501 only. It is not compatible with version IC660HHM500. The block can be used with any GE Fanuc Genius bus controller. It may also be used with any PCIM or QBIM module. a44483 115V 50/60 Hz 6 GEK-90486D-2 Chapter 6 115 VAC 16 Circuit Input Block 6-3 Block Operation The input circuitry is resistive. The resistive load is sufficient to activate most 2--wire proximity switch devices. Input resistance is 11.6K ohms, which provides a preload current of 9.9 mA at 115 volts. Input Device H N 11.6K Terminal Assembly Field Connections Voltage Sensing Circuits Electronics Assembly Internal +5V Processor 115 VAC A \" 47K B Y Vin ~ B Y Vsource Circuit LEDs Each circuit has its own LED that indicates the presence of On/Off threshold voltage. Input Data Format A 115 VAC 16 Circuit Input Block broadcasts 2 bytes of input data each bus scan. Appendix B shows reference usage for a Series 90, Series Six, or Series Five PLC. Byte # Description 0 Inputs 1 -- 8 (input 1 in bit 0) 1 Inputs 9 -- 16 (input 9 in bit 0) The block uses 16 input references and no output references. The value 1 in a bit indicates that the input is at or above its configured threshold voltage. Each bank of 8 inputs can have a different On/Off threshold. The factory configured default On/Off thresholds are 50% of the incoming line voltage. The default is suitable for most applications, or it can be changed within the range of 25% to 85% of the incoming voltage. Hand--held Monitor Input Display The HHM displays the current states of all inputs on line 4 of the Monitor Block screen REF 1- 16 I 1234567890123456 IIIIIIIIIIIIIIII 1101000101011101 Individual circuits are displayed on the Monitor/Control Reference screen (which also shows a circuit s fault status). 6 6-4 Genius I/O Discrete and Analog Blocks User s Manual -- September 1993 GEK-90486D-2 Optional Diagnostics 115VAC 16 Circuit Input blocks can be configured to perform Open Wire and Shorted Wire detection on any circuit. These diagnostics are optional; for a new block, both are disabled. Open Wire Detection If Open Wire Detection is enabled, the block monitors three voltage levels to sense On/Off/Open Wire conditions. To use this diagnostic, the Open Wire detection feature must be enabled for the circuit during configuration and resistance must be added across the terminals of the input device during installation. With the switch closed, the circuit senses a low source impedance. With the switch open, it sees the resistor (RP in the illustration below). If a wire is broken, cut, or removed the circuit sees a high impedance. The block then transmits 0 as the state of the input, and sends an OPEN WIRE message. a42532 N H IN Rp ON OFF OPEN 50% ON / OFF THRESHOLD 25% Open / OFF THRESHOLD ~ The resistor used for RP must be compatible with the block s thresholds. For dry contact sensors, the default thresholds are not changed, and a 22K ohm resistor can be used for RP . Shorted Wire Detection This option establishes four voltage levels for On/Off/Short Hi/Short Low. A series resistor (RS, below) near the input device allows the block to detect a shorted wire from a dry contact sensor to the input terminal high or neutral. Result: Block sets input state to 1 for short high or 0 for short low and issues a Short Circuit diagnostic. ~ a42533 N H Rs I N SHORT HI ON OFF SHORT LO 50% ON / OFF THRESHOLD With the switch closed, the circuit senses the resistor. With the switch open, the circuit sees a high impedance. If the input is shorted to the high or low side of the line, the circuit sees a low impedance. Short low and high limits are 10% and 90% respectively. RS must be compatible with the thresholds. For the default thresholds and a dry contact input, use a 3.9K ohm resistor for RS. 6 GEK-90486D-2 Chapter 6 115 VAC 16 Circuit Input Block 6-5 Using Open Wire and Shorted Wire Diagnostics Together Open Wire and Shorted Wire diagnostics can be selected for the same circuit. The circuit must include both a series resistor (RS) and a parallel resistor (RP) to detect Open/Short conditions from a dry contact sensor. For the default thresholds, use a 3.9K ohm resistor for RS and a 22K ohm resistor for RP. a42338 N H Rs IN Rp ~ SHORT HI ON OFF OPEN SHORT LO 90% 10% 50% ON / OFF THRESHOLD 20% OPEN / OFF THRESHOLD If sensors with non--zero voltage On state drop or non--zero Off state leakage current are used, the On/Off and Open/Off thresholds can be changed. This flexibility provides diagnostics capability with a wide range of sensors. Some solid state sensors may not require additional external resistance to be used. Consult the sensor manufacturer s specifications |
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