GE / IP FANUC Series 90/30 In Stock

Call Now




Rated 4.5/5 Based on 8 ratings.

Rate your purchase of the 1771-IS

Allen Bradley | PLC-5 | 1771-IS | Image

Allen Bradley | PLC-5 | 1771-IS | Image Allen Bradley | PLC-5 | 1771-IS | Image

SKU 2170259  UPC 0799705797772

Allen Bradley products are now sold by our affiliate company

Notice: By clicking this link, you will be redirected away from to

The Allen-Bradley 1771-IS multiplexer input module operates at a voltage rating of 5V DC. The module is single-slot and comes with the 1771-WF wiring arm. The module reads the status of 3 or 4-digit BCD thumbwheel switches and it is also capable of detecting an Off-On transition during a block transfer operation. The 1771-IS module has an LED status indicator to help in monitoring and troubleshooting. During the initial powering up, the module goes through an initialization process and when a fault is detected, the 1771-IS module will halt operation until the fault is corrected. The module is compatible with PLC controllers that support the 1771 Input and Output structure.

The 1771-IS module has a two-user selectable scan time; 15.3 milliseconds for the normal scan and 5.1 milliseconds for the fast scan. Unless interrupted by external factors like a user program, the scan time is continuous and after the interruption, the scanning continues from the last stop. The 1771-IS module has the capability to scan 72 switch contacts at the same time in a sequential order. The processor receives data from the 1771-IS that has already been scanned and multiplexed. The data comes from either the 3 or 4-digit thumbwheel switches.

The 1771-IS multiplexer input module uses switches to select a range of operating modes. The module is keyed using pins 8-10 and pins 26-28 for the lower and upper connections respectively. Additionally, the 1771-IS draws a current of 800mA from the backplane, has a switch power rating of 13 mA at 5V DC switch contact and accommodates a switch cable distance not exceeding 400ft. when more than 8 switch contacts are required, a decoupling diode is used. When wiring the 1771-IS module, use a cable capacitance of 0.039mF and an 18 or 20-gauge wire for cables that measure 100-400ft and cables <100ft respectively.

PDF Electric & Supply Inc. sells new, new surplus and refurbished products which are sourced through independent channels. All warranties and support, if applicable, are with PDF Electric & Supply Inc. and not the manufacturer. PDF Electric & Supply Inc. is not an authorized distributor or representative for the listed manufacturers and makes no representations as to any quality control performed by any listed manufacturer on the products. The products listed on this website may vary as to their country of origin; the accessories, and other items included with the product; and the language used on the packaging, the parts, and any related instructions or printed material related to the products. This website is not sanctioned or approved by any manufacturer or tradename listed. Designated trademarks, brand names and brands appearing herein are the property of their respective owners.