Rockwell Automation 1771-OFE/B Analog Output Module User Manual - Manual (Page 69)

Appendix
A
Publication 1771Ć6.5.30 - November 1998
Specifications
Outputs per Module 4 Individually Isolated
Module Location Bulletin 1771 I/O Chassis - One Slot
Output Voltage Ranges (Nominal) -
1771ĆOFE1
+1 to +5V DC
-10 to +10V DC
0 to +10V DC
Output Current (maximum) 10mA per Channel in Voltage Mode (1771-OFE1)
Output Current Ranges (Nominal) +4 to +20mA (1771-OFE2)
0 to +50mA (1771-OFE3)
Digital Resolution 12ĆBit Binary - 1 Part in 4095
Output Capacitance 0.01 µ F (Voltage Outputs)
0.022 µ F (Current Outputs)
Output Impedance <0.25 ohms for Voltage Outputs Exclusive of
Contact Wiring Resistance
>1.5 megohms for Current Outputs
Max Loop Impedance in the Current Mode 1771ĆOFE2 - Up to 1200 ohms Load Resistance
1771ĆOFE3 - Up to 400 ohms Load Resistance
Output Overload Protection All outputs are protected against short circuit load
conditions not to exceed one minute.
Backplane Power 1771ĆOFE1 1.50A
1771ĆOFE2 1.50A
1771ĆOFE3 2.50A
Power Dissipation 1771ĆOFE1 7.9W
1771ĆOFE2 7.9W
1771ĆOFE3 13.1W
Thermal Dissipation 1771ĆOFE1 26.9 BTU/hr
1771ĆOFE2 26.9 BTU/hr
1771ĆOFE3 44.5 BTU/hr
Isolation 1000V rms Between Output Channels
Tested at 1500V (Transient) for 1s Between the
Output Circuit and the Control Logic (System
Side)
D/A Converter Specifications Settling Time 0.8 ms Maximum for a Resistive Load
Internal Scan Rate 8.0 ms for All Channels Using BCD Data and
Scaling
1.6 ms for All Channels Using Binary Data and No
Scaling
Accuracy (Including Linearity, Gain, and
Offset at 25 o C)
+0.1% of Full Scale
+1/2 LSD (BCD Mode)
+1/2 LSB (BINARY Mode)
Temperature Coefficient +50 ppm/ o C of Full Scale Range
Specifications continued on next page