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I/O Modules and Hardware

Specialty I/O Modules

1771 Process Control I/O Modules

Cat. No.	Number of Inputs/ Outputs	Resolution	Analog Inputs	Analog Outputs	Data Format	Slots	Backplane Current Load	External Power Required	I/O Connection Hardware
1771-TCM	8 temp. inputs (for 8 PID heat/cool loops)	16-bit resolution or 15-bits plus sign bit	Thermocouple	None	16-bit Integer (natural binary)	1	1.5 A	None	1771-RTP1
	This Temperature Control Module is an intelligent I/O module that can accommodate 8 heat/cool PID loops for temperature control applications. The module has 8 analog inputs, each of which functions as the input for a PID loop. The PID algorithm is performed on the module for each of the loops. The output of each loop is sent from the module to the PLC processor’s data table as both a numeric value and as a time-proportioned output (TPO) signal. Your ladder logic can send either the numeric value to an analog output module, or the TPO signal to a digital output module to close the loop. For very fast cut-off, your ladder logic can use the TPO signal single-transferred to the input image. The 1771-TCM module has a thermocouple input (+100 mV) for each PID loop. The module provides auto-tuning of PID loops, self-calibration (external reference required) self-diagnostics, and detection of input open-circuit (including thermocouple break). This module includes special tuning options for temperature control in plastics machinery applications but can be used in most other temperature control situations as well.
1771-TCMR	8 temp. inputs (for 8 PID heat/cool loops)	16-bit resolution or 15-bits plus sign bit	RTD	None	16-bit Integer (natural binary)	1	1.5 A	None	1771-RTP1
	This Temperature Control Module is an intelligent I/O module that can accommodate 8 heat/cool PID loops for temperature control applications. The module has 8 analog inputs, each of which functions as the input for a PID loop. The PID algorithm is performed on the module for each of the loops. The output of each loop is sent from the module to the PLC processor’s data table as both a numeric value and as a time-proportioned output (TPO) signal. Your ladder logic can send either the numeric value to an analog output module, or the TPO signal to a digital output module to close the loop. For very fast cut-off, your ladder logic can use the TPO signal single-transferred to the input image. The 1771-TCMR module has an RTD input for each PID loop. The module provides auto-tuning of PID loops, self-calibration (external reference required) self-diagnostics, and detection of input open-circuit (including thermocouple break). This module includes special tuning options for temperature control in plastics machinery applications but can be used in most other temperature control situations as well.

1771 Positioning I/O Modules

Cat. No.	Inputs	Input Frequency, Max.	Outputs	Module Update Period	Slots	Backplane Current Load	Wiring Arm
1771-DL	12…24V DC 8 bit absolute encoder (gray code format only)	1 kHz	(1) 120V AC 0.5 A continuous zero speed switch	1 ms	1	0.12 A	1771-WB
	The Gray Encoder Input Module contains a decoder that converts an 8-bit gray-code input value from an absolute encoder into an 8-bit natural binary value. This absolute position value is available through the I/O scan to the input image table. A zero-speed output disables machine motion if encoder failure is detected. This module is compatible with PLC-5 processors.
1771-IJ	Incremental encoder or single-channel device: 5V TTL single-ended or differential	50 kHz	(2) 5V DC open- collector 0.5 A per output	1.3 ms	2	1.2 A	1771-WB
	The Encoder Counter Module maintains a count (independent of the PLC-5 processor) of input pulses that typically come from such devices as quadrature-type encoders, high-speed optical-beam counters, and certain types of switches. The module makes decisions based on the count total by comparing it to previously programmed values and activating either one or both of its outputs based on the results of the comparison. The module can also return the AC cumulated count (BCD or binary numbers) to the processor for arithmetic computations or display. The module also provides inputs for a marker signal from an encoder and a voltage-level signal from a limit switch to allow for home positioning. 1771-IJ module outputs can either be driven from the 5V DC supply through the module or from a separate load supply of a different voltage.
1771-IK	Incremental encoder or single-channel device: 12…24V DC single-ended	50 kHz	(2) 5V DC open- collector 0.5 A per output	1.3 ms	2	1.2 A	1771-WB
	The Encoder Counter Module maintains a count (independent of the PLC-5 processor) of input pulses that typically come from such devices as quadrature-type encoders, high-speed optical-beam counters, and certain types of switches. The module makes decisions based on the count total by comparing it to previously programmed values and activating either one or both of its outputs based on the results of the comparison. The module can also return the AC cumulated count (BCD or binary numbers) to the processor for arithmetic computations or display. The module also provides inputs for a marker signal from an encoder and a voltage-level signal from a limit switch to allow for home positioning. 1771-IK module outputs can be driven either from the external supply through the module or from a separate load supply.

Cat. No.	Inputs	Input Frequency, Max.	Outputs	Module Update Period	Slots	Backplane Current Load	Wiring Arm
1771-QA Stepper Motor Positioning Assembly	The Stepper Motor Positioning Assembly provides open-loop stepper control and point-to-point positioning. The assembly consists of one 1771-M1 Stepper Motor Controller Module and one 1771-OJ Pulse Output Expander Module (see rows below). One M1 module can control three OJ modules. The system can be expanded modularly from one to three axes per I/O chassis by placing one to three OJ modules in the chassis. The OJ modules can be located in any I/O module slot and in any order in the I/O chassis. Multiple stepper assemblies can be distributed throughout the plant using remote I/O or Data Highway configurations. Each axis can control a linear slide although not limited to that type of mechanical load. The axes can be controlled independently or control of the axes can be synchronized. The OJ module will accept from TTL up to 30V DC inputs, and inputs from the 1771-IJ, -IK modules.
1771-M1	—	—	—	—	1	1.75 A	None
1771-OJ	5…30V DC digital inputs for Jogging & E Stop	—	20 kHz output to translator Source/Sink Push-Pull	2.4…3.1ms to update output	1 per OJ	0.80 A	1771-WB
1771-QC Servo Positioning Assembly	The Servo Positioning Assembly consists of one 1771-M3 Servo Controller Module and one 1771-ES Servo Encoder Feedback Expander Module. With a basic servo positioning assembly (plus a servo drive, motor, tachometer, and encoder) you can provide closed-loop servo control for point-to-point positioning of one axis. You can add a second 1771-ES expander to control a second axis and a third 1771-ES expander to control a third axis.
1771-M3	—	—	—	—	1	1.75 A	None
1771-ES	5…30V DC, Incremental encoder. Auxiliary digital inputs: Jog, Start-stop, Override	250 kHz differential input	±10V DC analog command	2.4 ms to update analog output voltage	2 per ES	1.7 A	1771-WB
1771-QB Linear Positioning Module	The Linear Positioning Module is an intelligent I/O module designed specifically for closed-loop hydraulic servo control using a magnetostrictive linear displacement transducer. Axis motion profiles reside in the module and provide blended, chained, or continuous operations. The velocity or position of the axis triggers the next segment in the profile. Segments control the state of programmable outputs. The user can configure 242 segments within a single profile.
	Auxiliary digital: •8 mA/input @ 12V DC •16 mA/input @ 24V DC •Logic 0: 0…4V DC •Logic 1: 10…30V DC Transducer	—	Auxiliary digital: •digital source Servo valve: •analog ±10V DC, ±20 mA, ±50 mA, ±100 mA	2 ms/axis	1	1.6 A max. 1.1 A typical	1771-WN
1771-QD Injection Control Module	The Injection Control Module is a self-tuning closed-loop control module designed for thermoplastic and thermoset injection molding machines. The injection control module works with a PLC-5 processor and an operator interface (1784-T30C or 2711-KC1) using ProSet™ software to create a total machine control system. The module controls hydraulic cylinder velocity and pressure independently of its processor. The module is user configurable. It has on-board program execution and selectable profiles.
	3 analog inputs	—	2 analog outputs	2 ms scan auto tune PID and Velocity	1	0.5 A	1771-WF
1771-QDC Plastic Molding Module	The Plastic Molding Module is a dedicated module that controls the inject, clamp, and eject phases of an injection molding machine. The module performs open- or closed-loop control and is adaptable to most hydraulic configurations. With the Allen-Bradley Expert Response Compensation™ (ERC) feature, the module automatically compensates for variation in the molding machine's hydraulic characteristics without user intervention. ERC is an adaptive learning capability which automatically compensates for process variations while providing closed-loop control in the plastics industry. Provides flexibility for: 1- through 4-valve system; proportional or servo valves; selectable profiles per phase; trending of injection profile. The ample number of steps in each profile lets you accurately model the desired flow or motion to be performed during each molding task.
	4 analog inputs	—	4 analog outputs	2 ms scan auto tune PID and Velocity	1	1.2 A	1771-WF
1771-QI Co-injection Module	A pair of Co-injection Modules can control the injection phase of a plastic injection molding machine with 2 injection heads. Each module controls one of the two heads. In conjunction with the two 1771-QI modules controlling co-injection, a 1771-QDC module can be used to control clamping and ejection. The module performs open- or closed-loop control and is adaptable to most hydraulic configurations. With the Allen-Bradley Expert Response Compensation™ (ERC) feature, the module automatically compensates for variation in the molding machine’s hydraulic characteristics without user intervention. ERC is an adaptive learning capability which automatically compensates for process variations while providing closed-loop control in the plastics industry. Provides flexibility for: 1- through 4-valve system; proportional or servo valves; selectable profiles per phase; trending of injection profile. The ample number of steps in each profile lets you accurately model the desired flow or motion to be performed during each molding task.
	4 analog inputs	—	4 analog outputs	2 ms scan	1	1.2 A	1771-WF
1771-VHSC High-Speed Counter Module	The High-Speed Counter Module has 4 high-speed BCD or natural-binary 12-bit counters. The counter inputs can accept pulses from encoders, DC pulse generators, DC flow meters, and mechanical limit switches. The count and the rate are available to the PLC processor. You can assign any number of the 8 outputs to any of the counters; you can assign them all to a single counter. The module provides 6 modes of operation (counter, encoder X1, encoder X4, period/rate, rate/measurement, and continuous/rate mode) to AC hieve application-specific results that help increase overall system performance. You can configure any of the four counters for any one of these modes. Compatible with PLC-5 processors.
	12 digital inputs (3 per counter)	1 MHz in counter mode	8 digital outputs	100 ms	1	0.65 A	1771-WN

1771 Specialized I/O Modules

Cat. No.	Number of Inputs/Outputs	Voltage Range	Backplane Current Load	Slots	Wiring Arm	Miscellaneous
1771-CFM	4 digital inputs: •50 mV…200V AC peak — magnetic pickup •4…40V DC (TTL compatible) •Bently 3300 5 & 8 mm — proximity pickups 4 digital outputs: 5…40V DC (supplied by user)		1.0 A max.	1	1771-WN	Module scan time: 1.3…5 ms (depending on configuration and frequency)
	The Configurable Flowmeter Module interfaces with magnetic pickups, single-channel shaft encoders, turbine flowmeters, or any source of TTL pulses. The module supports rates as high as 100 kHz and counts to a maximum of 9,999,999. The module has 4 independent input channels and 4 independent outputs. You can configure each input channel for any of 4 modes. You can configure each output to operate as a function of values from any of the input channels. This module is capable of performing a prover function for custody transfer.
1771-DS	8 direct digital inputs	10…27V DC	0.375 A	1	1771-WF	Pulse capture time: 0.1, 0.5, 1, 2.5 or 5 ms
	The Latching Input Module detects and latches pulses of 0.1 to 5.0 ms duration from optical transmitters that have isolated pulse and gate outputs. You select the mode of input operation: independent for a single-pulse environment, paired for a multi-pulse environment.
1771-IS	72 direct digital inputs for: •up to four 4-digit BCD TW •up to six 3-digit BCD TW •up to 72 discrete switches	5V DC (supplied by module)	0.8 A	1	1771-WF	Module scan: •15.3 ms (normal) •5.1 ms (fast)
	The Multiplexer Input Module reads the steady-state status of six 3-digit or four 4-digit BCD thumbwheel switches, latches the off-to-on transition of up to 72 momentary hard-contact switches from a keyboard, or reads the steady-state status of up to 72 discrete hard-contact switches.
1771-PM	—	—	1.2 A	1 x 2	1771-WB	—
	The Clutch/Brake Control System is designed for clutch/brake control of part-revolution mechanical power presses. Features such as independent and constant I/O monitoring provide safety levels required by ANSI and OSHA — in a system of flexible reliable programmable control. The heart of the system is the clutch/break module (1771-PM) which you install instead of an I/O adapter module in the left-most slot of each of two I/O chassis.
1771-SIM	8 input switches 8 output indicators	—	0.2 A	1	—	—
	The I/O Simulator Module has 8 dedicated inputs for 8 toggle switches and 8 dedicated outputs for 8 indicators built into its front panel. You can use the 8 switches to simulate other open/close devices. The 8 indicators identify which addressed outputs are turned on in its byte in the output image table. One or more 1771-SIM modules can be installed in various slots of a 1771 I/O chassis to do a processor/chassis-level checkout prior to connecting inputs or outputs. If one is installed in a spare chassis slot, the switches may be used to effect program changes and the indicators can be addressed to show program status.