GE-IP | 9030 | GE Fanuc 90-30 GE-IP PLC

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  • Manufacturer: GE-IP
  • Description: GE Fanuc Series 90-30 12 bit res Analog Input Current 4 Channels
  • Weight: 1 lbs :: ≈ 1 kgs
  • Warranty: 1 Years
  • Product Revisions Available:
  • Other Available Revisions of the IC693ALG221 : A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z,

Product Manual Excerpt

Analog Current Input - 4 Channel IC693ALG221 The 4-Channel Analog Current Input module for the Series 90-30 Programmable Logic Controller provides four input channels, each capable of converting an analog input signal to a digital signal for use as required by your application. This module provides two input ranges. The default range is 4 to 20 mA with user data scaled so that 4 mA corresponds to a count of 0 and 20 mA corresponds to a count of 32000 with each 1000 counts representing 0.5 mA. When a jumper is added to the I/O terminal board, the input range is changed to 0 to 20 mA with user data scaled so that 0 mA corresponds to a count of 0 and 20 mA corresponds to a count of 32000 with each 800 counts representing 0.5 mA. Two range jumpers are provided with the module; one for channels one and two, and the other for channels three and four. Conversion speed for each of the four channels is one-half millisecond. This provides an update rate of two milliseconds for any channel. Resolution of the converted signal is 12 bits binary (1 part in 4096) over either range. User data in the %AI registers is in 16-bit 2 s complement format. The placement of the 12 bits from the A/D converter in the %AI data word is shown below. The relationship between the current input and the data from the A/D converter is shown in Figures 3-14 and 3-15. X D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 X X X MSB LSB X=not applicable to this discussion. 4 A/D BITS (decimal) CURRENT (mA) 4 TO 20mA RANGE a44647 0 20 0 4000 Figure 10-5. A/D Bits vs. Current Input If the current source is reversed into the input, or is less than the low end of the current range, then the module will output a data word corresponding to the low end of the current range (0000H in %AI). If an input that is out of range is entered (that is, it is greater than 20 mA), the A/D converter will output up to full scale (corresponding to 7FF8H in %AI). Input scaling is shown in the next figure. CURRENT (mA) 0 TO 20mA RANGE a44654 0 20 0 4000 A/D BITS (decimal) 10 10-6 Series 90-30 PLC I/O Module Specifications July 2000 GFK-0898F 4 %AI (decimal) CURRENT (mA) 4 TO 20mA RANGE a44655 0 20 0 32000 Figure 10-6. Scaling for Analog Current Input Input protection for the module is sufficient to guarantee operation with reduced performance with up to 200V common-mode. The module provides electrical isolation of externally generated noise between field wiring and the backplane through the use of optical isolation. To minimize the capacitive loading and noise, all field connections to the module should be wired using a good grade of twisted, shielded instrumentation cable. The shields can be connected to either COM or GND. The COM connection provides access to the common of the analog circuitry in the module. The GND connection provides access to the baseplate (frame ground). An LED at the top of the faceplate is ON when the module s power supply is operating. The main power source for the module is the isolated +24 VDC power supplied by the PLC power supply. This voltage is routed through an inverter/regulator to provide the operating voltage for the module. This module also consumes power from the +5 VDC output of the PLC power supply to drive the isolation circuitry. This module can be installed in any I/O slot of a 5 or 10-slot baseplate in a Series 90-30 PLC system. See page 3-11 to determine the number of Analog Current Input modules that can be installed in a system. Table 10-2. Specifications for Analog Current Input Module - IC693ALG221 Input Current Ranges 4 to 20 mA and 0 to 20 mA Calibration Factory calibrated to 4 A per count Update Rate 2 msec (all four channels) Resolution at 4-20 mA 4 A (1 LSB = 4 A) Resolution at 0-20 mA 5 A (1 LSB = 5 A) Absolute Accuracy 0.1% full scale + 0.1% reading Common Mode Voltage 200 volts Linearity < 1 Least Significant Bit Isolation 1500 volts between field side and logic side Common Mode Rejection > 70 db at DC; >70 db at 60 Hz Cross-Channel Rejection > 80 db from DC to 1 kHz Input Impedance 250 ohms Input Filter Response 325 Hz Internal Power Consumption 100 mA from the isolated +24 volt supply 25 mA from+5 volt bus on the backplane Refer to Appendix B for product standards and general specifications. In the presence of severe RF interference (IEC 801-3, 10V/m), accuracy may be degraded to 0.5% FS. %AI (decimal) CURRENT (mA) 0 TO 20mA RANGE a44656 0 20 0 32000 Analog Input Modules 10 GFK-0898F Chapter 10 Analog Input Modules 10-7 IC693ALG221 Analog Current Input Block Diagram The following figure is a block diagram of the 4-Channel Analog Current Input Module. IOCLK 15V 5V 15V INVERTER REGULATOR AND VOLTAGE SUPERVISOR RSTB PWR L5V EN IODT BID4 BID3 LGND ISOLATION BACKPLANE INTERFACE TIMING GENERATOR I24V IGND 5V MODE 1 (4 SIGNALS) ICLK AO, AI MXCLK BYSL WRB VOLT CHANGE ICS CIRCUITS RSTB ICLK ENAB SDOT DATA HIGH BYTE LATCH DATA BUSYB A/D CONVERTER VOLTAGE VREF REFERENCE POT 15V ADJUST OFFSET POT ADJUST FILTERED INPUTS DUAL 4:1 MUX TRI 2:1 MUX ANALOG INPUT INA117 DIFFERENTIAL AMP F I L E R T a44559 RAN2A RAN1A GND FRAME GROUND 250 RAN1B COM RAN2B F I * = OR MAXIMUM I SPECIFICATION Figure 10-7. Analog Current Input Module Block Diagram - IC693ALG221 10 10-8 Series 90-30 PLC I/O Module Specifications July 2000 GFK-0898F IC693ALG221 Analog Input Module Field Wiring Information The following figure provides information for connecting field wiring to the user terminal board on the 4-Channel Analog Current Input Module. Figure 10-8. Field Wiring for 4 Channel Analog Current Input Module Note In order to limit common-mode voltages, each current source common line may also be tied to its associated COM terminal if the source is floating. These optional connections are shown in the figure above. Please refer to Chapter 2 for wiring and shield ground connection details

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