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Here is all you need to know
The Proportional/Integral/Derivation Control (2-loop) Module Assembly (AB 1771-PD) is an intelligent I/O module that performs closed loop PID control. The PID module is a process controller and monitors the analog input process variable, compares the input to the desired set point and calculates the analog output control variable based on the control algorithm programmed in the module. The Allen Bradley 1771-PD PID module has the hardware inputs and outputs and microprocessor to perform PID control.
The PID module can control one or two PID closed loops. The two loops can be independent or linked together by and advanced control function such as cascade or decoupling. Expanded loop features can be chosen in addition to standard features to suite the application. All features are software selectable with the exception of the I/O range, the source of +5V DC, and the fault response to a hardware failure (which are selected using internal programming plugs). Write block transfers to the module allow program logic to enable the following features:
Process variable inputs | 2 |
Configuration | Differential |
Range (user selectable) | +4 to +20 mA +1 to +5 V DC |
Digital resolution | 12-bit binary, 1 part in 4095 |
Accuracy | +-0.1% range at 25°C |
Input impedence | 250 ohms (current) 10 megohms (voltage) |
Common mode rejection ratio | 70dB DC |
Common mode voltage range | +-200 V with respect to module common |
Common mode input resistance | 2.5 megohms |
Input frequency response | -3dB at 1kHz |
Maximum allowable input | +-30 mA (current) |
Digital resolution | 12-binary, 1 part in 4095 |
Accuracy | +-0.1% of range at 25°C |
Input impedence | 250 ohms (current) 4.7 megohms (voltage) |
Maximum allowable input | +-30 mA (current) 25 V ms (voltage) |
Temperature coefficient | +-50 ppm/°C |
Analog outputs | 2 |
Configuration | Single ended |
Maximum current | 250 mA |
Maximum power | 3 VA |
Backplane or external (digital circuits) | 1.2 A at 5 V DC |
External (analog circuits) | 100 mA at +15 V DC 100 mA at -15 V DC |
Loop update time | 100msec, typical |
Ambient temperature ratings | Operation 0°C to 60°C Storage -40°C to 85°C |
Part number | 1771-PDC |
The below specs apply to this product
Manufacturer | Allen Bradley |
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Range type | Power Supply |
Range | PLC-2 |
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