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ABB TU552-CS31 product image front view
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ABB TU552-CS31 S500 24 V DC CS31 Bus Terminal Unit with Spring Terminals

ABB · S500 / CS31
TU552-CS31
ABB TU552-CS31 is a spring-terminal S500 base for 24 V DC CS31 communication interface modules, retaining bus and field wiring during module replacement.
Channel groups
3 × 8
Rated supply
24 V DC
Lifecycle
Active
Standard CS31 version · 0.159 kg catalog weight · module connections established through the base
CS31 terminal base
30
field terminals
CS31 bus interface
Spring connections
Retained field wiring
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  • Shipped from the China
Product Specifications
Manufacturer ABB
Item number TU552-CS31
Country of Origin Switzerland
Lead Time 2-3 DAYS
After-Sales Support For after-sales support, please contact May.
HS Code / Commodity code Please confirm the destination before shipping.
FAQ

Quotes are valid for 30 days from the day the quote is received unless stated otherwise at the time of quotation.

Yes,we offer one year warranty for all new products.

Yes. We worked with FEDEX/DHL/TNT/UPS/ allowing us to provide swift global delivery of parts to any corner of the world.

Normally 3-5 working days,some remote areas 5-7 days more.

Product information
01
 
CS31 wiring platform
Bus, supply and terminal assignments for the standard spring base.
ABB-published connection points distinguish the fixed base wiring from module-dependent signals.
01Signal terminals
30
02Maximum channels
24
03Channel distribution
3 groups of 8
04CS31 bus positive
B1
05CS31 bus negative
B2
06End resistor terminals
R1 / R2
07Process voltage positive
UP
08Process voltage zero
ZP
Terminal type
Spring
Country of origin
Switzerland
Catalog weight
0.159 kg
Official lifecycle
Active
Order review
Identify the matching I/O module, CS31 wiring and terminal arrangement before ordering.
02
CS31 base replacement
Keep field wiring fixed while the communication interface is exchanged.
Bus polarity, line termination, functional earth and the inserted module type must remain consistent.
The remaining signal assignments depend on the installed CS31 communication module.
01
Record the bus wiring
Identify B1, B2, functional earth and the active end-of-line resistor connections before releasing the module.
02
Verify the process supply
Confirm the positive and zero-potential rails and include the supply in the control-system earthing concept.
03
Match the inserted interface
Use only a compatible 24 V DC S500 CS31 communication module and verify every module-dependent terminal assignment.
04
Lock and commission
Secure both mechanical locks, inspect the I/O-bus connection and test CS31 communication before returning the station to service.
DIN-rail grounding
Direct functional earth
Mounting orientation
Horizontal / vertical
Wiring retention
Module removable
Module supply path
From UP / ZP
Official ABB sources: TU551/TU552 data sheet, CS31 terminal-unit help and S500 system description.
03
 
Buyer decision notes
Questions customers ask about ABB TU552-CS31.
Use these answers to review bus integration, replacement checks and purchasing details.
Clear, model-specific information for a confident purchasing decision.
Which communication interfaces are intended for ABB TU552-CS31?
ABB specifies the terminal unit for S500 CS31 interface modules using 24 V DC I/O or interface signals. Check the current module compatibility list before selection.
01
How is CS31 line termination handled on ABB TU552-CS31?
The terminal unit provides dedicated R1 and R2 end-resistor points. Terminate only according to the physical bus topology and preserve B1/B2 polarity.
Why is ABB TU552-CS31 useful during maintenance?
The communication interface can be removed after unlocking while bus, process-supply and field wiring remain connected to the terminal unit.
02
Does ABB still classify ABB TU552-CS31 as an active article?
Yes. ABB lists the standard spring-terminal order code as Active. Confirm condition, quantity and delivery date in the quotation.
Can ABB TU551-CS31 replace ABB TU552-CS31 without changing the wiring method?
The two bases serve the same CS31 family but use different terminal technologies and order codes. Review conductor preparation, tooling and cabinet service practice before changing.
03
Which records should accompany an ABB TU552-CS31 inquiry?
Send the base label, inserted CS31 module type, bus-termination arrangement, terminal photographs, requested condition, quantity, destination and required date.
04 · Professional Team
A professional team you can trust for complex automation sourcing.
Careful identification and patient communication support every stage of the purchasing decision.
Professional automation sourcing team in a project meeting
Collaborative project review
10+
Years of Industry Experience
Our team members have an average of more than 10 years of industry experience. We have worked with customers worldwide, including those from India, Germany, Sweden, Italy, Russia, Venezuela, Israel, and many other countries. Throughout our careers, we have collectively completed over 3,000 orders and established long-term business relationships with customers across nearly 30 countries.
Professional Product Judgment
We can often identify a product’s manufacturer, series, configuration, and function from its model number or nameplate photo. We also understand how revisions, firmware, and specifications affect compatibility and whether an alternative model can be used safely.
Sincere and Patient Service
Our team treats every inquiry sincerely and answers every question patiently. Even for complex requests, we verify and respond to each detail instead of providing a rushed or uncertain answer.
In Practice
An Indian customer urgently needed a discontinued control module after several suppliers reported no stock. We identified its exact revision and function from the nameplate, checked compatible alternatives, and contacted factory and warehouse channels to locate matching inventory. After installation, the customer confirmed that the module operated correctly and later asked us to source additional spare parts.
In Practice
A German customer sent a mixed list of automation products and asked repeated questions about revisions, condition, photos, and delivery. Our team organized the requirements, checked every item, and replied point by point. The customer said our detailed communication made the purchasing decision easier and continued sending us new inquiries.
05
 
Transaction Cases
Sincere Cooperation, Long-Term Trust
Real service experience shaped by verification, communication and dependable follow-through.
CASE 01
Russia
A Russian customer urgently needed a replacement for a discontinued automation component. After reviewing the product label, technical parameters, and application details, our engineers recommended a compatible alternative and provided photos and test videos before shipment. The alternative performed well, enhancing the customer's confidence in our technical capabilities and leading to multiple repeat orders.
CASE 02
India
An Indian customer still had doubts after initial online communication with us, so they visited our company in person for a face-to-face meeting and product inspection. This visit increased the customer's trust and led to the successful placement of their first order. Over the next few years, we completed multiple orders and established a stable, long-term partnership.
CASE 03
Venezuela
A Venezuelan customer needed a specific automation component and compared products and services from several suppliers online. After nearly three weeks of careful consideration, our sincere communication, professional service, and reliable product quality won the customer's trust. After receiving the product and using it for several weeks without any problems, the customer gave us positive feedback and subsequently placed multiple orders.
06
 
Cross-brand sourcing desk
More automation options for your next project.
A mixed selection for maintenance, retrofit and hard-to-find spare-part requests.
Sourcing support
Exact part-number review
Mixed-brand list consolidation
Availability and delivery coordination
Share your brand, model and required date.
01
EB401-10
02
XD26
03
102044-00-48-15-02 DR TSE 060-987-166
04
AIR-ANT2547V-N
05
IS23DI0XCD000
06
1763-L16BWA
07
TSXDSY64T2K
08
CT-0155NSP-SB2L-E
09
SENSUS 04410580
10
D-1101-RSG2100 RJ45TX01
11
FF20-S33
12
MS-RA205
13
084053 HDP5000
14
1SVR427025R0000
15
JL086A
16
KE1051 A004-9
17
CR1000 CR1021-04
18
EXP-2200 LBL-EXP2200
19
ABB PM867K01
20
FG5448
21
Yokogawa ADV869
22
Honeywell TC-CCR014
23
FMZ5000 903466
24
21188-1 0P6237
25
837447005 737 839-001 G00
26
PW6K1R2
27
k01-0958
28
VJP-4E
29
Rockwell Automation 1756-A13
30
MTN6730-0003
31
ATW-RC13 SYSYTEM10
32
MA1479A
33
Emerson KJ3204X1-BA1
34
OPT-B8-V:3 Pt100 181B0305 OPT-B8-V
35
ABB/BBC HEIE420318R3 XT375A-E 9090/006
36
GH118-GYDXI
37
ABB SD834
38
SL0105 -SLG23CEEAKOA
39
SIR88N
Request a quote
Ask about ABB TU552-CS31.
Send the full nameplate, installed system, condition, quantity, destination and required date.

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