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1771-OFE1
Allen Bradley PLC-5 Analogue Output Module

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2 year warranty 2 year warranty*

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*Manufacturer's warranty does not apply

PLC-5 Analogue Output Module
Description

Informationen zu diesem Produkt

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The Analog Output Module (cat. no. 1771-OFE1) is an intelligent block transfer module that converts binary or four-digit BCD values (supplied by your processor) to analog signals at its four module outputs. The module accomplishes the data transfer with block transfer programming.

Block transfer write (BTW) programming moves up to 13 words of data from the processor to the module for digital to analog (D/A) conversion in one  program scan. This information is converted to analog signals and is sent to the appropriate output channels. A block transfer read (BTR) moves five words of data from the module to the processor data table, if desired, for diagnostic purposes.

The module has a scaling feature that converts data sent to the module in engineering units to the proper analog signals. You may connect up to four analog output devices--such as valve positioners, motor speed controllers, signal converters or recorders--to the analog output module’s four channels. All analog output device inputs should conform to the voltage or current ratings of each module output channel.

Features of the 1771-OFE1 Module

In the programmable controller system, the analog output module provides the following functions:

  • Four individually isolated differential outputs
  • Selectable scaling to engineering units
  • Selectable data format
  • Selectable voltage ranges (1771-OFE1 only)
  • No external power required--power is drawn from the 1771 I/O chassis backplane
  • Requires only one I/O slot
AB 1771-OFE1 Technical Specifications
Outputs per module4 individually isolated
Module locationBulletin 1771 I/O chassis - one slot
Output voltage ranges
(Nominal) -1771-OFE1 
+1 to +5 V DC
-10 to +10 V DC
0 to +10 V DC 
Output current (max.)10 mA per channel in voltage mode (1771-OFE1)
Digital resolution12-bit binary - 1 part in 4095
Output capacitance0.01 uF (voltage outputs)
0.022 uF (current outputs) 
Output impedance<0.25 ohms for voltage outputs exclusive of contact wiring resistance
Output overload protectionAll outputs are protected against short circuit load conditions not to
exceed one minute 
Backplance power1.50 A
Power dissipation7.9 W
Thermal dissipation26.9 BTU/hr
Isolation1000V ms between output channels tested at 1500 V (transient) for 1s
between the ouput circuit and the control logic (system side)
D/A converter specifications selling time0.8 ms maximum for a resistive load
Internal scan rate8.0 ms for all channels using BCD data and scaling
1.6 ms for all channels using binary data and no scaling 
Accuracy (linearity, gain and offset at 25°C) +0.1% of full scale
+1/2 LSD (BCD mode)
+1/2 LSB (BINARY mode) 
Temperature coefficient+50 ppm/°C full scale range
Part number1771-OFE1
PDFs

die Specs

Die nachfolgenden Angaben beziehen sich auf dieses Produkt

ManufacturerAllen Bradley
Range typeOutput Module
RangePLC-2
UPC612598003051
PDFs

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