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          Apter Power supports chain-position checks, official manuals, condition review, and exact-variant sourcing.

        1745-E101

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        1001 reviews ｜ Need a Specific Revision?
        Allen-Bradley 1745-E101 adds ten 85–132 V AC inputs and six hard-contact outputs to a supported SLC 100 or SLC 150 expansion chain.
        In Stock
        Ships by Wednesday, October 28
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
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        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for 1745-E101

        • Manufacturer:
          Allen-Bradley
        • Part Number:
          1745-E101
        • Product Family:
          SLC 100
        • Product Type:
          SLC Basic Expansion Unit
        • Stock:
          1
        • Expansion I/O:
          10 inputs / 6 outputs
        • Input circuits:
          85–132 V AC, current sinking
        • Output circuits:
          6 hard contacts, 10–250 V AC / 10–125 V DC
        • Maximum power requirement:
          12 VA
        • Input power fuse:
          315 mA / 250 V
        • Color patch:
          Red
        • Operating temperature:
          0–60 °C
        • Wiring:
          14–24 AWG stranded
        • Estimated shipping dimensions:
          25x9.5x12.4cm
        • Tariff Code:
          8537101190
        • Country of origin:
          USA
        • Place of shipment:
          Xiamen,Fujian,China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals I/O Address Input Match Relay Loads Product Applications

        Features:

        • Sixteen expansion points: ten inputs and six hard-contact outputs
        • Low-voltage AC branch: red-patch 85–132 V AC inputs
        • Position-based role: physical chain order determines the assigned I/O block
        This unit expands an existing controller; it does not contain the application program or operate independently.

        Its cable position and address block are therefore as important as the field-terminal wiring during replacement.

        Relay-output loads should be classified and protected before the original unit is removed.

        Apter Power can support 1745-E101 expansion-position review, official manuals, condition checks, and exact-variant sourcing.
        Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        • Physical order: photograph the unit between adjacent expansion devices
        • Address block: record the input and output words assigned by that position
        • Cable orientation: preserve connector direction and routing without live insertion
        • Red patch: confirm the 85–132 V AC variant
        • Field check: measure voltage, common, and off-state leakage at the terminal
        • Diagnostic path: compare the LED, terminal signal, address, and processor logic
        • Six contacts: list the controlled device and switching duty for each output
        • Inductive loads: retain the documented suppression at coils and solenoids
        • Reconnection: test for shorts, inrush, and safe state before energizing
        • Discrete expansion: add sixteen points to supported SLC 100 or SLC 150 systems
        • Low-voltage AC sensing: connect matched 85–132 V AC field circuits
        • Mixed-voltage switching: use hard contacts within the official AC or DC ranges
        Description
        A supported SLC 100 or SLC 150 system gains sixteen discrete points through 1745-E101. This red-patch basic expansion unit provides ten 85–132 V AC current-sinking inputs and six hard-contact outputs for AC or DC loads.

        Unlike a processor, 1745-E101 derives its control role and I/O addresses from its physical position in the expansion chain. The official 12 VA maximum power requirement, 315 mA input-power fuse, status indication, and interconnect arrangement guide installation and troubleshooting.

        Replacement work on 1745-E101 should preserve expansion order, address blocks, cable orientation, field voltage, output-load suppression, and terminal identification. E102 shares the I/O count but its black-patch inputs belong to the 170–265 V AC range.
        Alternative Names
        Allen-Bradley 1745-E101 1745 E101 SLC low-voltage basic expansion SLC100 16-point expansion unit
        Technical notes
        Expansion position determines I/O addressing for 1745-E101. Before disconnecting it, record the red 85–132 V AC variant, physical chain order, interconnect routing, assigned input and output blocks, relay loads, and suppression devices. Power down the processor, all expansion units, and field circuits before moving cables or terminal wiring.
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        Why can moving 1745-E101 within the expansion chain change machine behavior?
        Physical position determines the assigned I/O block. Moving the unit can shift program addresses, so preserve the original order and reconcile every mapped point before restart.
        Can 1745-E101 function as a standalone controller?
        No. It is an expansion unit and depends on a supported SLC processor, interconnect, address assignment, power arrangement, and application program.
        What should be traced when an input LED on 1745-E101 is on but the program bit is off?
        Start with the physical chain position and assigned address. If those agree, trace the terminal signal and common wiring before replacing the expansion unit.
        How should an inductive device connected to 1745-E101 be handled during replacement?
        Preserve the documented suppression at the load and verify that the circuit fits the hard-contact duty. Do not reconnect a coil with an unknown short or excessive inrush.
        How can maintenance distinguish 1745-E101 from the higher-voltage E102 unit?
        Use the full catalog label and red patch, then confirm the field voltage. This unit uses 85–132 V AC inputs rather than the black-patch 170–265 V AC bank.
        What must be isolated before the interconnect of 1745-E101 is unplugged?
        Remove controller, expansion, and field power under the approved procedure. The legacy interface is not intended for live insertion or removal.

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