Rockwell Automation 1771-QDC PLASTIC MOLD.MODULE - Manual (Page 283)

Chapter
5
Publication 1771-6.5.88 – July 1997
Module Specifications
This chapter gives 1771-QDC module specifications including:
•
I/O specifications
•
environmental conditions
•
hardware requirements
•
process control options
The following table lists the I/O specifications.
Inputs 4 analog (4-20 mA, 1 to +5V dc, 0 to +10V dc selectable)
Outputs 4 analog (4-20 mA, 0 to +10V dc, –10 to +10V dc selectable)
I/O Resolution 12-bit binary
I/O Isolation 1500V rms between chassis and swingarm terminals, and
between input and output terminals
I/O Accuracy
(linearity, gain, and offset) 0.1% full scale @ 25 o C, and +/–50ppm/ o C of full scale range
Input Impedance Voltage Input: 50K ohms, differential mode
25K ohms, common mode
Current Input: 250 ohms
Loss of Input Detection Detects loss of position, pressure, and RPM input sensors:
out of range 4-20 mA sensors
out of range 1-5V dc sensors
out of range 0-10V dc sensors
Output Loading Voltage: 5 mA max for any range
Current: 15V dc compliance
(supports a max current-loop impedance of 750
ohms)
Output Overload
Protection Protects against short circuit for one minute, maximum
The following table lists environmental conditions.
Operational Temperature 0 to 85 o C (32 to 140 o F)
Thermal Dissipation 21 BTU/hr (outputs full ON)
Storage Temperature –40 to +85 o C (–40 to +140 o F)
Relative Humidity 5 to 95% (without condensation)
The following table lists the hardware requirements.
Compatible I/O Chassis Allen-Bradley Series B
Slot Size Any single I/O slot in 1771-I/O chassis
Power Requirements (Backplane) 1.2 amps at 5V dc
Swingarm Style 1771-WF
Keying Bands Between: 20-22
and 26-28
I/O Specifications
Environmental Conditions
Hardware Requirements