EN
Siemens 6ES7157-0AF81-0XA0 AFD Active Field Distributor
Manufacturer: Siemens
Condition: Brand New
Lead Time: In Stock
Origin: Germany
Warranty: 12 Months
Email: [email protected]
whatsApp: +86-18150117685
- Overview
- Hot Selling Models
- Recommended Products
Overview
- Confirm the PA segment uses the intended FDC 157-0 coupler and ring topology.
- Count no more than four connected PA field devices per AFD.
- Check each spur load against the 60 mA limit.
- Match IP rating, terminal technology, cable glands and grounding to the installed product version.
SIMATIC DP/PA Link · PROFIBUS PA
6ES7157-0AF81-0XA0 AFD Active Field Distributor
Four-spur active field distributor for PROFIBUS PA field devices in a redundant PA ring.
At a Glance
| Brand | Siemens |
|---|---|
| Model | 6ES7157-0AF81-0XA0 |
| Product Type | Active field distributor |
| Core Function | Connects up to four PROFIBUS PA field devices to a PA main line |
| Compatible Series | SIMATIC DP/PA Link / FDC 157-0 |
Four PA spur lines
Connect up to four certified PROFIBUS PA field devices through X1–X4.
Ring redundancy
Works with two FDC 157-0 DP/PA couplers to support a redundant PA ring.
On-device diagnostics
LEDs indicate PA main-line and spur-line status or faults.
Product Overview
6ES7157-0AF81-0XA0 is a Siemens AFD active field distributor for PROFIBUS PA installations. It provides four spur connections for PA field devices and two PA main-line connections.
The AFD operates in a PA segment with FDC 157-0 couplers and supports ring-redundant architectures. Confirm the installed product version before applying enclosure ratings.
Key Functions
Four protected spur connections
X1–X4 connect PROFIBUS PA instruments and support up to 60 mA per spur.
Redundant PA line operation
Two FDC 157-0 couplers and AFD devices can form a ring for improved segment availability.
Local indication
Green and red LEDs provide main-line and spur-line operating or fault indication.
Official Specifications
| Siemens article number | 6ES7157-0AF81-0XA0 |
|---|---|
| Product designation | Active field distributor (AFD) |
| Application | PROFIBUS PA field-device distribution |
| PA main-line connections | 2 (PA1 and PA2) |
| PA spur-line connections | 4 (X1–X4) |
| Maximum PA field devices | 4 per AFD |
| Maximum current per PA spur | 60 mA |
| Rated supply voltage | 16–32 V DC via PA line |
| Maximum supply voltage | 35 V |
| Polarity reversal protection | Yes |
| Internal current consumption | Max. 25 mA; 59 mA with open main line |
| Protection class, version 02 | IP65 |
| Protection class, version 01 | IP66 |
| Terminal technology, version 02 | Screw terminals |
| Terminal technology, version 01 | Spring-clamp terminals |
| Dimensions, enclosure | 125 × 57 × 80 mm |
| Dimensions with screw glands | 175 × 57 × 105 mm |
| Approximate weight | 700 g |
| Main-line status indication | Green LEDs for PA1 and PA2 |
| Main-line fault indication | Red LEDs for PA1 and PA2 |
| Spur status/fault indication | Green LEDs for X1–X4 |
Frequently Asked Questions
What does 6ES7157-0AF81-0XA0 distribute?
It connects the PROFIBUS PA main line to as many as four certified PA field devices through spur lines X1–X4.
How many PA instruments can 6ES7157-0AF81-0XA0 connect?
The AFD connects up to four PA field devices, one on each spur.
What current limit applies to each spur on 6ES7157-0AF81-0XA0?
Each PA spur line has a 60 mA maximum current.
Can 6ES7157-0AF81-0XA0 be used in a redundant PA ring?
Yes, the AFD supports ring redundancy with two FDC 157-0 DP/PA couplers.
How is 6ES7157-0AF81-0XA0 powered?
The distributor receives 16–32 V DC through the PA line without a separate auxiliary supply.
How do the enclosure versions of 6ES7157-0AF81-0XA0 differ?
Check the installed version because version 01 has IP66 protection with spring clamps, whereas version 02 has IP65 protection with screw terminals.
Which indicators on 6ES7157-0AF81-0XA0 support fault finding?
LEDs report PA1/PA2 main-line status and faults and X1–X4 spur status or faults.
