Introduction to S900 I/O system

S900 provides the input and output modules needed for intrinsically safe field signal connection. The field signals are digitized in every S900 func tional module, electrically isolated, and then output via an internal serial bus. The communication inter face converts the signals to adapt them to the stan dardized PROFIBUS-DP V1 fieldbus protocol. Supervisory process control systems, DCS or SCADA systems use an intrinsically safe fieldbus to communicate with the communication inter face. A PROFIBUS connect allows the configu ration of the individual S900 stations with cyclic data exchange, acyclic services and communica tion with HART-compatible field instruments. All functional modules can be replaced easily and quickly, which is an advantage especially in the   installation or maintenance phase in hazardous area. 

The functional modules and the – optionally redundant – communication interface modules placed in Zone 1 can be removed and plugged in while operation is running. Integrated encapsulated switch-off mechanisms allow for hot swapping of the power supplies. Due to its little space requirements and robust design and its environmentally ruggedized case, the S900 Remote I/O System is a cost-saving   solution for use on site, in hazardous Zone 1 or Zone 2 areas (ATEX). No external signal adaptation   or routing required S900 provides various input and output modules: Analog input modules with or without integral transmitter supply, or with direct temperature measuring input for 2-, 3- or 4-wire resistance thermometers or thermocouples with internal cold junction compensation. Analog output   modules for direct positioner or actuator control. Solenoid driver units or NAMUR inputs for intrin sically safe and short-circuit-proof power supply of digital field instruments. Additionally, options are available for critical   applications, allowing for channel-wise electrical isolation of the inputs and outputs. S900 permits direct connection of the entire field level through only 2 lines. As no separate routing, power supply or fusing is needed, the installation cost is reduced considerably. Three different series with different use and with different approvals are available.

Redundant termination unit TU921S/B/N

• Termination unit for up to 16 I/O modules 

 • Prepared for redundant system power and communication 

 • Up to 4 terminals per channel 

 • Preselection of fieldbus address 

 • Prepared for certified field housing 

 • Mounting in Zone 1 or Zone 2 possible

PROFIBUS DP configuration for S700

TU921S Redundant Termination Unit (TU16R-Ex) For 16 I/O-modules. Redundant communication and power. (Delivery includes CD910). 3KDE175111L9210

TU921B 3KDE175112L9210

TU921N Redundant Termination Unit (TU16R) For 16 I/O-modules. Redundant communication and power. (Delivery includes CD910). 3KDE175113L9210

Power supplies SA920S/B/N

The remote S900 I/O system, type B and type S must be equipped in such way that total power consumption of all S900 I/O modules and S900 Communication Interfaces does not exceed 55 watts. SA920S, Power Supply for 24 V DC. Compared to previously used power supply SA910S (45 W) the SA920S (55 W) has a 10 W higher output power. SA920B, Power supply for redundant termination unit TU921B (TU16R-B) in S900 I/O. For installation in hazardous area Zone 2. For connecting intrinsically safe field devices installed in Zone 2 or Zone 1 or Zone 0. With an S900 I/O System of type N, the total power con sumption of the power units SA920N in an S900 I/O System station must not exceed the power limit of 70 watts.

SA920S  Power Supply For 24 VDC.   The power supply filter type BP901S is not required. Do not mix SA910S with SA920S for redundancy (observe Release Notes). 3BDH000602R1

SA920B Power Supply For 24 VDC.   The power supply filter type BP901S is not required.   SA920B is the functional replacement for SA910B Do not mix SA910B with SA920B for redundancy (observe Release Notes). 3BDH000601R1

SA920N Power Supply For 24 VDC.   The power supply filter type BP901S is not required.   SA920N is the functional replacement for SA910N Do not mix SA910N with SA920N for redundancy (observe Release Notes). 3BDH000600R1

Digital I/O modules

Digital I/O modules DX910S/B/N 

 • Input for dry contacts or proximity switches (NAMUR) 

 • Output for low power intrinsically safe valves 

 • Short and break detection 

 • Electrical isolation between input / bus and input / power 

 • Common return for all inputs / outputs 

 • Configurable as a mixture of inputs and outputs 

 • 8 I/O channel

Solenoid driver DO910S/B/N 

 • Output for intrinsically safe valves or alarms 

 • Integrated driving power 

 • Short and break detection 

 • Electrical isolation between output / bus and output / power 

 • Electrical isolation channel to channel 

 • 4 channels

DO910S  Digital Output (DO4-Ex) Output for intrinsic safe valves. 3KDE175321L9100

DO910B 3KDE175322L9100

DO910N Digital Output (DO4) Output for valves. 3KDE175323L9100

Frequency input DP910S/B/N

• Frequency input for dry contacts or proximity switches 

• Short and break detection 

 • Electrical isolation between input / bus and input / power 

 • Frequency measurement or counting applications 

 • 2 Function blocks 

 • Reset via fieldbus or control input 

 • Status outputs / Direction recognition

Analog I/O modules

Analog input AI910S/B/N

• Power supply for 4...20 mA loop powered 2-wire transmitters 

 • Short and break detection 

 • Electrical isolation between input / bus and input / power 

 • Common return for all inputs 

 • 4 channels

AI910S   3KDE175511L9100
AI910B   3KDE175512L9100

AI910N  3KDE175513L9100

Analog input, HART, AI930S/B/N

• Power supply for 4...20 mA loop powered 2-wire transmitters 

• Short and break detection 

 • Electrical isolation between input / bus and input / power 

 • Common return for all inputs 

 • 4 channels 

 • Transmission of HART frames via the fieldbus 

 • Cyclic HART variables

AI930S  Analog Input, HART (AI4H-Ex) Transmitter power supply, 4..20 mA. 3KDE175511L9300

AI930B Analog Input, HART (AI4H-B) Transmitter power supply, 4..20 mA. 3KDE175512L9300

AI930N Analog Input, HART (AI4H) Transmitter power supply, 4..20 mA. 3KDE175513L9300

Analog input, HART, passive, AI931S/B/N

 • Passive inputs for 0/4...20 mA 

 • Short and break detection 

 • Electrical isolation between input / bus and input / power 

 • Common return for all inputs 

 • 4 channels 

 • Transmission of HART frames via the fieldbus 

 • Cyclic HART variables

Temperature input AI950S/B/N

• Pt 100, Pt 1000, Ni 100, 0...3 kOhm in 2-/3-/4-wire technique • Thermocouple Type B, E, J, K, L, N, R, S, T, U, mV • Internal or external cold junction compensation • Short and break detection • Electrical isolation between input / bus and input / power • Electrical isolation channel to channel • 4 channels

Analog output AO910S/B/N

• Output signal 0/4...20 mA for actuators • Short and break detection • Electrical isolation between output / bus and output / power • Output with common ground • 4 channels

Analog output, isolated AO920S/B/N

• Output signal 0/4...20 mA for actuators • Short and break detection • Electrical isolation between output / bus and output / power • Electrical isolation channel to channel • 4 channels

Analog output, HART, AO930S/B/N

• Output signal 0/4...20 mA for actuators • Short and break detection • Electrical isolation between output / bus and output / power • Output with common ground • 4 channels • Transmission of HART frames via the fieldbus • Cyclic HART variables

Field housing

Field housing FH660S, FH680S

Stainless steel field housing for extended termination unit • Prepared for wall mounting • Mounting in Zone 1 or Zone 2

FH660S - 2000 Field housing Termination Unit (backplane) TU921S 4 Terminals (UK10N) Field housings are delivered without cable glands. Cable glands have to be ordered separately (see General information and Product Update 2PAA112874) 3KDE175804V2000 

FH660S - 2020 Field housing Termination Unit (backplane) TU921S 4 Terminals (UK10N) 2 Switches Field housings are delivered without cable glands. Cable glands have to be ordered separately (see General information and Product Update 2PAA112874) 3KDE175804V2020

FH680S - 2020 Field housing Termination Unit (backplane) TU921S 4 Terminals (UK10N) 2 Switches Field housings are delivered without cable glands. Cable glands have to be ordered separately (see General information and Product Update 2PAA112874) 3KDE175811V2020

S900 - BI100 Field Housing roof Weather protection.   Fits to all field housing. 3KDE175831L1000

Accessories for S900

BI914S Fieldbus isolating repeater separates an intrinsically safe RS485 fieldbus from a non intrinsically safe RS485 fieldbus with bus termination mounted in DIN rail mounted housing with IP20 protection one channel version BARTEC - 07-7311-97WP/K1E0 3BDH000649R1

BI923S  Ring-coupler RS485 / FO - intrinsically safe - Slave Separates an intrinsically safe fibre optic ring from a non intrinsically safe RS485 interface BARTEC - 07-7311-97WP5400 integrated in DIN rail mounted housing with IP20 protection Optical Plug FSMA (Slave) 3KDE175831L9230

BI924S  Ring-coupler RS485 / FO intrinsically safe - Master Separates an intrinsically safe fibre optic ring from a non intrinsically safe RS485 interface BARTEC - 07-7311-97WP5400 integrated in DIN rail mounted housing with IP20 protection Optical Plug FSMA (Master) 3KDE175831L9240

BI934S Ring-coupler RS485 / FO intrinsically safe (slave) Separates an intrinsically safe fibre optic ring from one intrinsically RS485 fieldbus segment integrated in separate field housing BARTEC - 07-3103-2512/9003 Optical Plug FSMA 3BDH000674R0001

IP920 Module housing IP20 protection for empty slots on the termination unit.   For use in S900 S, B, and N systems. 3KDE175831L9200

IL910 Insert labels 380 pcs. 3KDE175839L9101

BP914S D-SUB Connector (color blue) for operating the intrinsically safe PROFIBUS-DP with CI920AS and CI920AB. Siemens 6ES7972-0DA60-0XA0 Connector can only be used with CI920AS and CI920AB. Do not use in combination with CI920S or CI920B. This would violate the explosion protection and could cause destruction of CI920S or CI920B. For CI920S and CI920B connector BP910S has to be ordered as spare part 3BSE067082R1

CD910 Additional Software CD ROM incl. S900 Documentation, Certificates, GSD (file) ABB DTM S900 DP and Software Tools CD ROM will be delivered with all TU921 and CB220 deliveries  3KDE175839L9100

PROFIBUS DP configuration for S700

When the Freelance controllers are equipped with the appropriate PROFIBUS Master module they can communicate over a single PROFIBUS DP seg ment with several remote I/O stations.  

PROFIBUS network components

RLM02  PROFIBUS Redundancy Link Module for PROFIBUS line redundancy Converts a non-redundant PROFIBUS line to two redundant RS485 lines or vice versa. 3BSE091723R1

PCO 011 PROFIBUS DP connector with bus termination Max. 12 Mbit/s, 35° cable outlet, IP40, switchable bus termination. 3BDZ000371R1

PCO 012 PROFIBUS DP connector with bus termination and adapter Max. 12 Mbit/s, 35° cable outlet, IP40, switchable bus termination, programming connection SUB-D. 3BDZ000372R1

FOUNDATION Fieldbus network components

LD 810HSE EX LD 810 HSE EX Linking Device LD 810 HSE EX module for DIN rail mounting with 4 H1 links and one HSE connector. The module itself needs external 24 VDC power supply. H1 links must be powered separately. Restrictions: Linking Device LD 810HSE Ex is not suitable for replacing one of the LD 800 Linking Devices in a redundant pair. To clarify, both devices in the redundant pair must be replaced with LD 810HSE Ex. Redundancy cable for LD 810HSE Ex can be made / procured by the end customer directly & need not be ordered through ABB.