How does the executive cartridge change the AS-S908-110 remote-drop limit?

For the listed 984-685E and 984-785E/K/D systems, AS-E908-016 supports 15 remote drops and AS-E908-131 supports 31. Check the installed executive rather than assuming the higher limit.

Can AS-S908-110 provide redundant A/B coaxial paths?

No. It is listed as a one-port RIO head. Redundant cabling requires two ports at the head and two ports on every participating drop adapter.

May a remote adapter connect directly to the AS-S908-110 trunk?

No. Connect each adapter through an individual tap port and drop cable. A direct adapter-to-trunk connection causes an impedance mismatch.

Which connections must remain terminated while servicing an AS-S908-110 network?

Keep the trunk end and unused tap ports terminated at all times. A disconnected drop cable may also require a 75-ohm terminator, especially during extended maintenance or on a time-critical network.

Does removing AS-S908-110 permit removal of the cable-system ground?

No. The permanent central ground must remain connected even when the RIO head is disconnected. Use the approved common, low-impedance single-point cable-system ground.

What controls the longest usable AS-S908-110 coaxial route?

Use the head-to-drop loss calculation, not cable length alone. The listed slot-mount S908 systems have a 35 dB dynamic range; include cable, tap, splitter, splice and terminator losses in the path.

Do physical drop positions determine AS-S908-110 RIO addresses?

No. Each remote adapter needs its own unique configured address. Its location along the cable does not determine that address or the network throughput.

What should be checked before replacing AS-S908-110 when drop retries increase?

Inspect cable routing, earth grounding and connectors first, then use documented network tests to isolate media problems. Excessive retries can result from noise or installation defects rather than a failed head processor.

AS-S908-110 RIO Processor | Schneider Electric

Name: AS-S908-110
Brand: Schneider Electric
SKU: AS-S908-110

AS-S908-110

RIO Processor

In Stock

Ships by Sunday, October 18

Fast Shipping Available

Technical specifications for AS-S908-110

Manufacturer:

Schneider Electric

Product Category:

PLC Systems

Spare Part Number:

AS-S908-110

Estimated shipping dimensions:

22.9 x7.6x27.9cm

Weight:

1.2 kg

Tariff Code:

8537101190

Counliy of origin:

France

Processor role:

S908 RIO head, master node

RIO ports:

Listed host controllers:

984-685E and 984-785E/K/D

RIO media:

75-ohm coaxial cable system

Executive AS-E908-016:

Up to 15 remote drops in the listed 984 systems

Executive AS-E908-131:

Up to 31 remote drops in the listed 984 systems

Head-to-drop attenuation limit:

35 dB for the listed slot-mount S908 systems

Drop addressing:

Unique address per remote adapter

Trunk layout:

Single-cable linear topology

Trunk terminator:

52-0422-000, 75 ohms

Unused tap-port terminator:

52-0402-000

Trunk splitter allowance:

1; a second is permitted for the documented hot-standby head connection

Drop connection:

Individual tap port and drop cable; never direct to trunk

Typical trunk medium:

RG-11; RG-6 permitted for small networks

Typical drop medium:

RG-6; RG-11 used where the plan requires lower loss or improved noise immunity

Cable-system ground:

Common low-impedance single-point ground near the RIO head

Supported 800-Series drop interfaces:

Listed J890/J892 and P890/P892 variants; match connector and termination version

Information

Overview Manuals Common Applications Product Precautions

Schneider Electric AS-S908-110 provides the single-port head-end communication path for the listed 984 S908 remote-I/O systems. The controller, executive cartridge, drop map and coaxial media design together determine the usable network.

Initiates exchanges with the configured remote-I/O drops.
Connects the listed slot-mount 984 controllers to the S908 cable system.
Uses a planned trunk, taps and individual drop connections.
Works with the executive-defined remote-drop allocation.

The cable system is part of the installation, not an Ethernet accessory. Retain the drop addresses, appropriate terminators and approved grounding arrangement, then verify network integrity and communication to each configured drop.

Important Notice: Two-path redundant cabling requires two head ports and two ports on every participating drop adapter; that is not the single-port AS-S908-110 configuration.

Schneider Electric AS-S908-110 Manuals & Downloads

Schneider Electric AS-S908-110 Technical Reference (PDF)Schneider Electric AS-S908-110 Installation & Commissioning Guide (PDF)

The technical reference maps the S908 head, executive and coaxial network limits; the installation guide separates topology checks, termination, grounding, media inspection and network acceptance.

984 remote-I/O head endProvides the RIO master path for the listed 984-685E and 984-785E/K/D controller configurations.

Single-trunk distributed dropsCommunicates with independently addressed remote adapters connected through individual taps and drop cables.

800-Series I/O continuityMaintains the documented legacy remote-I/O arrangement with the appropriate J890/J892 or P890/P892 adapter variants.

Coaxial-network maintenanceSupports restoration of the approved S908 topology followed by documented grounding, media and communication checks.

Read the S908 network instructions before work. Verify AS-S908-110, its host controller and executive cartridge, the configured drop map, coaxial termination and the approved maintenance state.

Match the head processor to the listed 984 controller and the installed executive cartridge.

Keep the drop count within the selected executive's 15- or 31-drop allocation; do not treat either limit as universal.

Retain the single-port topology; redundant cabling requires two head ports and matching dual-port drop adapters.

Connect every drop through its own tap port and drop cable, never directly to the trunk.

Keep the trunk end and unused tap ports terminated with the correct 75-ohm components.

Preserve the permanent single-point cable ground when disconnecting the RIO head; do not leave the system floating.

Maintain approved cable routing and connector installation; keep shield braid clear of the center conductor.

Test network integrity and verify every configured drop after restoration before releasing the process.

Technical notes

Select the S908 executive for the actual controller and remote-drop allocation: AS-E908-016 supports 15 remote drops and AS-E908-131 supports 31 in the listed 984 configurations. A single-port AS-S908-110 does not provide the two head ports required for redundant cabling.

FAQS

How does the executive cartridge change the AS-S908-110 remote-drop limit?

For the listed 984-685E and 984-785E/K/D systems, AS-E908-016 supports 15 remote drops and AS-E908-131 supports 31. Check the installed executive rather than assuming the higher limit.
Can AS-S908-110 provide redundant A/B coaxial paths?

No. It is listed as a one-port RIO head. Redundant cabling requires two ports at the head and two ports on every participating drop adapter.
May a remote adapter connect directly to the AS-S908-110 trunk?

No. Connect each adapter through an individual tap port and drop cable. A direct adapter-to-trunk connection causes an impedance mismatch.
Which connections must remain terminated while servicing an AS-S908-110 network?

Keep the trunk end and unused tap ports terminated at all times. A disconnected drop cable may also require a 75-ohm terminator, especially during extended maintenance or on a time-critical network.
Does removing AS-S908-110 permit removal of the cable-system ground?

No. The permanent central ground must remain connected even when the RIO head is disconnected. Use the approved common, low-impedance single-point cable-system ground.
What controls the longest usable AS-S908-110 coaxial route?

Use the head-to-drop loss calculation, not cable length alone. The listed slot-mount S908 systems have a 35 dB dynamic range; include cable, tap, splitter, splice and terminator losses in the path.
Do physical drop positions determine AS-S908-110 RIO addresses?

No. Each remote adapter needs its own unique configured address. Its location along the cable does not determine that address or the network throughput.
What should be checked before replacing AS-S908-110 when drop retries increase?

Inspect cable routing, earth grounding and connectors first, then use documented network tests to isolate media problems. Excessive retries can result from noise or installation defects rather than a failed head processor.

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AS-S908-110

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AS-S908-110

Product Describe：

Ask our team:

Warranty Policy

Return Notice

Shipping Method

Parts Availability

How to order

Technical specifications for AS-S908-110

Technical specifications for AS-S908-110

Information

Information

Technical notes

Technical notes

Our World，Made Possible By Manufacturing.

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