Q: How many modules can this base unit support?
A: Up to eight I/O or expansion modules in the AnS/QnAS series.
1 actual photo shown first. Reference images are model-matched and must be confirmed before purchase.
Mitsubishi
A1S58B-S1
8-Slot Extension Base Unit, Melsec AnS/QnAS, DIN-rail mount
Mitsubishi
From $209.44In stockDiscontinued
Product Description
The A1S58B-S1 is an eight-slot extension base unit for Mitsubishi Melsec AnS/QnAS PLC architectures, providing additional backplane capacity for I/O, communication, and specialty modules without a separate local power supply module. Designed for DIN rail installation, it integrates terminal blocks and grounding for straightforward wiring and panel integration. The unit supports up to eight I/O modules and specifies M4 FG terminal screws with a recommended tightening torque to ensure reliable terminations. Installation accommodates M5 hardware via 6 mm slotted holes, and wiring is suited for 0.75 to 2 mm² conductors with supported solderless terminal types. Typical accessories include a dust cover, mounting screws, and a DIN rail hook. Use this base to scale AnS/QnAS systems while maintaining compact dimensions and standardized mounting in industrial control enclosures.
Key Features
- •Eight-slot expansion for AnS/QnAS PLCs,DIN-rail mounting with included hook,Integrated terminal block and FG terminal,M4 terminal screws with specified torque,Supports 0.75 to 2 mm² conductors,6 mm slotted holes for M5 screws,No separate power supply module required
Buy Options
Condition, indicative price, stock, and lead time. Confirm current availability via RFQ.
ConditionPriceAvailabilityLead time
New
Price: $261.8
Availability: 9 in stock
Lead time: ~2 day lead
Never Used
Price: RFQ
Availability: Sourced on request
Lead time: Quoted after RFQ
Used
Price: $209.44
Availability: 48 in stock
Lead time: ~2 day lead
FNFP
Price: RFQ
Availability: 2 in stock
Lead time: Quoted after RFQ
Specifications
- Manufacturer
- MITSUBISHI
- Brand
- MITSUBISHI
- Manufacturer Part Number
- A1S58B-S1
- Product Type
- Slot extension base unit
- Series
- Melsec AnS/QnAS
- Number of I/O module slots
- 8
- Mounting
- DIN rail
- Power supply module loading
- Not required
- Installation hole size
- 6 mm slot for M5 screw
- Terminal screw size
- M4 (FG terminal)
- Applicable wire size
- 0.75 to 2 mm²
- Applicable tightening torque
- 12 kg·cm (118 N·cm)
- Included accessories
- Dust cover, four M5 x 25 mounting screws, DIN rail hook
- Part #
- A1S58B-S1
- Category
- PLCs/Machine Control
- Subcategory
- PLC Module/Rack
- Weight
- 2.09 lbs
Before we quote this part
Actual photos when available
Nameplate, condition, and visible wear can be shared before quote when stock photos are not enough.
Test notes for used units
Power-on or function test status is stated when available, with clear condition grading.
Trackable global shipping
DHL, FedEx, UPS, or forwarder options can be quoted with packing photos and tracking details.
Clear DOA boundary
For tested units, quote terms can include 7-day DOA support unless otherwise stated.
Independent sourcing disclaimer
We are not an authorized distributor, reseller, or representative of Siemens, Mitsubishi, Omron, or other manufacturers listed on this site. All product names, trademarks, brands, and logos are the property of their respective owners. Products may be used, refurbished, surplus, or sourced from the secondary market unless otherwise stated.
Need A1S58B-S1 availability?
Prices and stock can change. Submit quantity, required condition, and destination for a current quote.
FAQ
Q: Is a separate power supply module required?
A: No, it is driven by the main PLC power supply.
Q: What mounting hardware is compatible?
A: 6 mm slotted holes for M5 screws and DIN rail hook are supported.
Q: What wire sizes are supported for terminals?
A: Conductors from 0.75 to 2 mm² are supported.
Q: What is the specified terminal screw torque?
A: 12 kg·cm (118 N·cm) for secure connections.