Revisions: IC660EBA105A , IC660EBA105B , IC660EBA105C , IC660EBA105D , IC660EBA105E , IC660EBA105F , IC660EBA105G , IC660EBA105H , IC660EBA105I , IC660EBA105J , IC660EBA105K , IC660EBA105L , IC660EBA105M , IC660EBA105N , IC660EBA105O , IC660EBA105P , IC660EBA105Q , IC660EBA105R , IC660EBA105S , IC660EBA105T , IC660EBA105U , IC660EBA105V , IC660EBA105W , IC660EBA105X , IC660EBA105Y , IC660EBA105Z ,
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circuits for devices that accept 4 to 20mA signals. Outputs 5 and 6 can also be used for voltage applications. Two Current source Analog Output Blocks are available: 115 VAC/125 VDC Current sour ce Analog 6 Output Block(IC660BBA105) 24/48 VDC Current sour ce Analog 6 Output Block (IC660BBA025) Features These blocks provide power to all circuits; no separate power is required for 4 20mA signals. Each output provides power and control of a 4 to 20mA current loop. This power is isolated from the rest of the block. The outputs and BSM circuitry are electrically common. Output accuracy is 0.15% at 25C. Output resolution is 6mA. A dedicated digital output is provided to drive a Bus Switching Module when a Current Source Analog block is installed in a redundant bus cable system. Additional configurable features include: Output Hold Last State or default Circuit scaling to engineering units values. Output feedback checking and feedback time CPU Redundancy Fault reporting can be enabled or disabled circuit by circuit. These blocks automatically perform the following diagnostic checks: Output Overrange and Underrange Output Feedback less than 1.5mA Compatibility These blocks are compatible with all Genius bus controllers, PCIM and QBIM modules. Hand held Monitor IC660HHM501E, version 3.7 (or later) is required for configuration. For a Series Six PLC, the CPU must be rev. 105 or later. For a Series Six Plus PLC, rev. 110 or later is required. The programming software must be Logicmaster 6 rel. 4.02 or later. For a Series Five PLC, the CPU must be rev. 3.0 or later. The Logicmaster 5 programming software must be rel. 2.01 or later. A Bus Switching Module must be the 24/48 VDC version (IC660BSM021) only. GND Current Source Output 115V 50/60 Hz .25A Max a44489 H N NC BSM IOUT RTN GND 12 GEK-90486D-2 Chapter 12 Current-source Analog 6 Output Blocks 12-3 Block Operation The block has six independent output circuits which are electrically common to each other and the Bus Switching Module outputs, but isolated from all other circuits on the block. Power for the outputs current loops is provided by the block. Output Circuits Output channels use a dual 12 bit digital to analog converter, and can independently Processor Isol. 12 12-4 Genius I/O Discrete and Analog Blocks User s Manual September 1993 GEK-90486D-2 Output Data Format A Current source Output Block receives 12 bytes of output data each bus scan. Each analog output consists of 2 bytes of engineering units data. Appendix B shows reference usage for a Series 90, Series Six, or Series Five PLC. The block automatically translates this engineering units value into the analog output signal used by the output device. Hand held Monitor Output Display Outputs are whole integers. For example, if the current value of an output was 35.81, it could be reported as: 35 engineering units, or 358 tenths of units, or 3581 hundredths of units Output values are displayed on the Monitor Block screen. REF 97 192 O O1: 962 O2: 3581 > Individual outputs are also displayed in the Monitor/Control Reference screens. 12 GEK-90486D-2 Chapter 12 Current-source Analog 6 Output Blocks 12-5 Diagnostics Current source Analog Output Blocks perform the diagnostics described below. If a fault occurs, the block will report it to the Hand held Monitor, and take appropriate corrective action. Individual circuits can be configured not to send a diagnostic message to the CPU if a fault occurs. If the CPU requests diagnostic information from the block using a Read Diagnostic datagram, the block returns current diagnostics for all circuits, including any with CPU fault reporting disabled. Output Underrange and Overrange Diagnostics The block sends an UNDERRANGE message if conversion of the engineering units output it receives from the CPU results in a commanded output less than 0mA. It sends an OVERRANGE message if conversion of the engineering units output it receives from the CPU results in an output signal level that exceeds 24mA. The block clamps the output to the selected range limit to protect external hardware. Output Feedback Error This diagnostic is used to detect wiring errors or other hardware faults on output circuits. After waiting for a configurable period of time, the block checks the current level of the output. If it is less than approximately 1.5mA, the block reports a Feedback Error. The block continues sending new values from the CPU to the output. Feedback fault reporting should be disabled if a channel is configured for a voltage application. Nuisance diagnostics may be reported if the Output Feedback Time selected for the circuit is too brief. If this happens, increase the feedback time or disable output feedback testing. 12 12-6 Genius I/O Discrete and Analog Blocks User s Manual September 1993 GEK-90486D-2 Field Wiring Terminals 5 through 32 are used for input power, Bus Switching Module control, and field wiring devices. These terminals accept AWG #22 to AWG #14 wires. Do not overtorque the terminal screws. The ground (GND) terminal (5) is for block safety. It is connected to the block chassis, and to terminals 13, 16, 19, 22, 27, and 32 which are marked GND. Each channel has one ground terminal for shield termination, if desired. Power Source Wiring Connect an appropriate power source to terminals 6 and 7. For AC block power, connect the source to the H terminal and neutral to the N terminal. For DC block power, connect the source to the DC+ terminal and the return to the DC terminal. Wiring for I/O Devices Typical wiring for various configurations is shown. Wiring for Voltage Outputs: If the load requires 0 to 5 volts power, connect the load across the VOUT and RTN terminals (circuits 5 and 6 only). Attach a jumper across the RTN and JMP terminals. If the load requires a different voltage range, connect it across the VOUT and RTN terminals. Do not jumper the RTN and JMP terminals. Install an appropriate resistor across the OUT and JMP terminals. For example, the maximum voltage obtainable if a 500 ohm resistor is used is: VMAX = 20mA / 500W = 10V Wiring for Current Outputs: If the load requires current in the 4 to 20mA range, connect it between the OUT and RTN terminals (for circuits 1 through 6). Connecting a Bus Switching Module to a CSO Block If an optional Bus Switching Module is installed, connect the BSM control wires to terminals 9 and 10. The polarity from the block is as marked; the BSM is insensitive to polarity. Features marked with an asterisk in the table are configured from the Program Block ID screen of the Hand held Monitor, as explained in chapter 3. The rest of the features can be configured either using a Hand held Monitor, or by sending a Write Configuration datagram to the block from the host. Before configuration begins, the features of each Current source Analog Output Block should be decided upon, then recorded on a copy of the Configuration Worksheet printed on the next page. |
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