Supply 1771-IK Allen Bradley Encoder/Counter Module Wholesale Factory

Product Specification And Image

Attribute	Value	Image
Manufacturer	Allen Bradley
Product No.	1771-IK
Product type	Encoder/Counter Module
External Supply	12- -24V dc
Output Ratings	lout = 500mA max per output
Power Dissipation	12.1 Watts maximum
Thermal Dissipation	12.1 Watts maximum
I/O Isolation	Tested to 1500V ac for 1s
Limit Switch Input	12- 48V dc

Details of AB 1771-IK

The 1771-IK module is designed to accept several types of devices that will operate in the 12 to 24V dc range. Since most high voltage quadrature encoder outputs produce signals through an open collector output, the module is configured for a pull-up on channel B. Channel A must be set for a pull-up by setting switch 1 on and switch 2 off.

AB 1771-IK

Certain counting devices may need an input designed to pull current down through the device. Switch 2 should be set on for pull-down and switch 1 left off. The module detects a minimum of 7.2V dc at its input channels as true for a 12V dc external supply and 14.4V dc at 24V dc external supply.

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More Description

The module will count in either BCD or binary numbers. In the BCD mode, the range is 000 to 999 with carry and borrow bits provided to cascade counters in the program. The binary mode allows a higher count total, with a range of 0000 to 409510, but the number appears at the processor in binary. Additionally, the module can improve the accuracy of certain quadrature type of encoders by adding the count at both channel A and channel B (times 2 mode), or by counting the rising and falling of both channel inputs to give a fourfold increase in the count (times 4 mode).

The encoder/counter module is available in two versions:

cat. no. 1771-IJ - uses a 5V dc external power supply that allows inputs to be TTL compatible. Outputs can either be driven from the 5V dc supply through the module or from a separate load supply of a different voltage.

cat. no. 1771-IK - uses a 12-24V dc external power supply. Input devices should be compatible with the voltage of the external power supply. Outputs can be driven either from the external supply through the module or from a separate load supply.