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Home >> ABB >> ABB S900 I/O Application-Guide CI920S/CI920B replaced by CI920AS/CI920AB
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ABB S900 I/O Application-Guide CI920S/CI920B replaced by CI920AS/CI920AB

From:ABB | Author:Wang | Time :2025-01-03 | 247 visit: | Share:

ABB S900 I/O Application-Guide CI920S/CI920B replaced by CI920AS/CI920AB

Products Concerned
Installed Products
Item Article number Item Description
CI920B V1.5.9 3BDS014112 Communication Interface for Zone 2
CI920S V1.5.9 3BDS014111 Communication Interface for Zone 1
BP910S 3KDE175831L9100 Intrinsically Safe PROFIBUS DP connector
Replaced by
Item Article number Item Description
CI920AB V2.1.0 3BDH000691R1 Communication Interface for Zone 2
CI920AS V2.1.0 3BDH000690R1 Communication Interface for Zone 1
BP914S 3BSE067082R1 Intrinsically Safe PROFIBUS DP connector
Reference Documents
Reference Document number Title
[1] 2PAA107377 S900 I/O Release Notes PROFIBUS DP Communication Interface
CI920A V2.1.0
[2] 2PAA107376 S900 I/O System - CI920S / CI920B replaced by CI920AS / CI920AB
[3] 3BDD015032R0101 I/O System S900 PROFIBUS Interface CI920 V1.5.9 Release Notes
[4] 3BDD010432R0103 I/O System S900 Assembly and Installation Guide, S- and N-System
with power supply SA910
[5] 3BDD010421R0303 I/O System S900 Assembly and Installation Guide, S- and N-System
with power supply SA920
[6] 3BDD010421R0201 800xA – Control and I/O S900 I/O System Version 5.0 Installation
Guide S- and N-System with Power Supply SA910
[7] 3BDD010421R0401 800xA – Control and I/O S900 I/O System Version 5.0 Installation
Guide S- and N-System with Power Supply SA920
[8] 3BDD010432R0103 I/O System S900 Assembly and Installation Guide, B-version with
power supply SA910
[9] 3BDD010432R0303 I/O System S900 Assembly and Installation Guide, B-version with
power supply SA920
[10] 3BDD010432R0201 800xA – Control and I/O S900 I/O System Version 5.0 Installation
Guide B-System with Power Supply SA910
[11] 3BDD010432R0401 800xA – Control and I/O S900 I/O System Version 5.0 Installation
Guide B-System with Power Supply SA920
[12] 3BDD010421R0501 S900 I/O Manual Installation Guide S-N-System SA920 CI920A
[13] 3BDD010421R0503 S900 I/O Manual Installation Guide S-N-System SA920 CI920A
[14] 3BDD010432R0501 S900 I/O Manual Installation Guide B-System SA920 CI920A

[15] 3BDD010432R0503 S900 I/O Manual Installation Guide B-System SA920 CI920

Term Definition
* Used as wildcard for ‘S’ or ‘B’, suffix of S900 components item
Example: CI920A* means both CI920AB and/or CI920AS
Used as wildcard for ‘S’, ‘B’, ‘N’, ‘AS’ or ‘BS’ suffix of S900 components item in configuration tools as
DTM, HWD, GSD
x Used as wildcard for sub-revisions ‘0’, ‘1’, … ‘9’
Example: CI920S V 1.4.x means CI920S V 1.4.1 and /or CI920 V 1.4.2
Description
1. General
This document provides information that will help you to update the communication interface
CI920* to CI920A* in existing plants as smoothly as possible.
The CI920A* is the successor of the CI920*. The previously used types CI920S and CI920B no
longer have the life cycle status ‘Active’. The compatibility of the new communication interfaces
CI920AS and CI920AB to the CI920S and CI920B is sufficient so that the predecessor types
(CI920S/CI920B) are no longer required. If there is a need for replacement, you should therefore
use the new types CI920AS or CI920AB.
Differences:
 The main difference between the new types (CI920AS/CI920AB) and the predecessor
communication interfaces (CI920S/CI920B) is the PROFIBUS connection for the
intrinsically safe PROFIBUS. The physical layer of the communication interfaces CI920S
and CI920B had previously been designed according to manufacturer specifications in
accordance with R. STAHL. The physical layer of the communication interfaces CI920AS
and CI920AB now meets the standard according to PROFIBUS International Guideline
RS485-IS.
 The communication interfaces CI920AS and CI920AB have been type approved
according to explosion protection standards EN 60079-0:2006, EN 60079-11:2007 and
EN 60079-25:2004.
 For the software design of the new communication interface CI920A* 2.1, all existing
functions of the communication interface CI920* 1.5.9 with external relevance have been
maintained. The existing system integrations in 800xA (HW Library, DTM), Melody (DTM)
and Freelance (GSD, DTM) can therefore still be used without any changes.
 Identified bugs of the communication interface CI920* in version 1.5.9 have been fixed in
the communication interface CI920A* Version 2.1. The bug fixing is described in the
Release Notes 2PAA107377 [1] for the communication interface CI920A* 2.1 in the
‘Corrected Behavior’ section
Compatibility with existing systems
2.1.1 Hardware compatibility with existing systems
The following installations of the intrinsically safe PROFIBUS segment can be found in existing
plants:
Start of bus
(master side)
S900 at center of bus S900 at end of bus
Installation
type
PROFIBUS
isolating
repeater/ coupler
PROFIBUS
connector
S900
communication
interface
PROFIBUS
connector
S900
communication
interface
1 BI912S
BP910S
(bus termination:
off)
CI920S
or
CI910B
BP910S
(bus termination:
on)
CI920S
or
CI910B
2 BI913S
3 BI914S
4 BI933S
5 BI934S
The existing installation types can be converted as follows using the new CI920AS or CI920AB.
2.1.2 Communication interface update without updating the physical layer
Only the S900 communication interfaces are replaced (highlighted grey), the network
components are not changed. The intrinsically safe physical layer according to manufacturer
specification in accordance with R. STAHL remains unchanged.
Start of bus
(master side)
S900 at center of bus S900 at end of bus
Installation
type
PROFIBUS
isolating
repeater/ coupler
PROFIBUS
connector
S900
communication
interface
PROFIBUS
connector
S900
communication
interface
1 BI912S
BP910S
(bus termination:
off)
CI920AS
or
CI910AB
BP910S
(bus termination:
on)
CI920AS
or
CI910AB
2 BI913S
3 BI914S
4 BI933S
5 BI934S
When converted during operation, it is possible to temporarily use a mixed configuration
consisting of CI920* and CI920A* on the same intrinsically safe bus segment.
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