Description
ABB cHBX01K02 Compact Horizontal Bus Extender Kit
Product Introduction
When an SD Series cabinet needs to extend the HN800 bus from one horizontal module row to another, the physical bus segment has to be built with the correct left- and right-side termination hardware. ABB cHBX01K02 is the compact horizontal bus extender kit designed for that purpose. ABB specifies the kit as one cHBX01L left-side bus extender plus one cHBX01R right-side bus extender, forming the connection between horizontal HN800 bus segments.
The kit provides redundant HN800 bus connections, while the left-side cHBX01L also provides the 24 VDC module-power connection. ABB specifies a 4.0 Mbps redundant HN800 bus, a 90 mm HN800 bus length for each extender, horizontal-row mounting, and a compact 127 mm form factor. The important procurement point is that cHBX01K02 is a complete bus-extender kit, not an I/O module or fiber-optic repeater.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | cHBX01K02 / CHBX01K02 |
| ABB Ordering Number | 2VAA008580R1 |
| Manufacturer | ABB |
| Platform | ABB Ability Symphony Plus |
| Series | SD Series |
| Product Type | Compact Horizontal Bus Extender Kit |
| Kit Configuration | 1 × cHBX01L + 1 × cHBX01R |
| Primary Bus | HN800 |
| Bus Type | Redundant I/O bus |
| Bus Speed | 4.0 Mbps |
| Mounting | Horizontal row |
| Form Factor | Compact, 127 mm |
| Bus Length | 90 mm per cHBX01L/R |
| Module Power | 24 VDC |
| Maximum Current | 3.0 A @ 24 VDC |
| Power Connection | 4-point power terminal block on cHBX01L |
| Bus Connection | connectors on cHBX01L and cHBX01R |
| Inter-row Connection | SPK800-xx cables |
| Hot Swap | No |
| Operating Temperature | -40°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | 20–95% at 40°C, non-condensing |
| Protection Class | IP20 |
| Galvanic Isolation Test | 1500 V for up to 1 minute |
| Operating Altitude | Sea level to 3,048 m |
ABB’s current hardware selector gives the cHBX01K02 article number as 2VAA008580R1 and identifies its lifecycle status as ACTIVE. It also specifies 3.0 A maximum current at 24 VDC, #18–12 AWG acceptable field-power wiring, and the environmental ratings listed above.
Application Scenarios & Pain Points
Extending Horizontal Rows
The main purpose of cHBX01K02 is to connect horizontal SD Series bus segments. The cHBX01L is installed at the left side of the row and provides both the redundant connection and the 24 VDC module-power connection. The cHBX01R terminates the opposite side and provides the corresponding connection.
CHBX01K02
SD Series I/O Cabinet Expansion
In a larger Symphony Plus cabinet, I/O and communication modules may be distributed across multiple horizontal rows. The cHBX01K02 allows those rows to be connected through the architecture using the specified SPK800-xx inter-row cables.
New Cabinet Construction
For a new SD Series installation, the kit establishes the physical bus boundary required for a horizontal row. The module itself does not process application signals; it provides the bus and power infrastructure around the actual controllers, I/O modules, and communication modules.
Legacy System Expansion
For maintenance or expansion work, the kit can be relevant when an existing Symphony Plus SD Series cabinet needs additional horizontal bus capacity. The exact controller and I/O architecture should be checked before adding a bus segment.
Related Products
- ABB cHBX01L — compact horizontal bus extender for the left side; provides and 24 VDC module-power connections.
- ABB cHBX01R — compact horizontal bus extender for the right side; provides the connection.
- ABB HBX01K02 — conventional horizontal bus extender kit using HBX01L/HBX01R rather than the compact cHBX01 pair.
- ABB VBX01K02 — vertical bus extender kit for column-mounted arrangements.
- ABB SPK800-xx — cables used to connect bus segments between horizontal rows.
- ABB TER810 — enhanced bus terminator used at the ends of applicable bus arrangements.
- ABB cRBX01 — optical remote bus extender for extending the redundant I/O bus over fiber; this is a different function from cHBX01K02.
- ABB HRBX01K02 — redundant fiber-optic repeater kit containing two cRBX01 modules and an RMU610 base. It should not be confused with the cHBX01K02 horizontal electrical bus-extender kit.
Engineer’s Guide — Field Pitfalls to Avoid
1. Do not confuse cHBX01K02 with HRBX01K02.
The names are very similar, but the functions are completely different. cHBX01K02 is a compact horizontal electrical bus segment kit. HRBX01K02 is a redundant optical remote-bus repeater kit containing cRBX01 modules.
2. Do not order only one side when the requirement is for the complete kit.
cHBX01K02 contains one cHBX01L and one cHBX01R. If the existing cabinet requires only one replacement extender, purchase the individual component rather than assuming the complete kit is required.
3. Remember that the 24 VDC power connection is on the left-side extender.
The cHBX01L carries the module-power connection. The cHBX01R does not perform the same power-entry function.
4. Check the bus cable before commissioning.
ABB specifies SPK800-xx cables for connecting bus segments between horizontal rows. Do not substitute a generic cable simply because the connector appears mechanically compatible.
5. Do not treat the kit as an I/O module.
There are no application-level analog or digital channels associated with cHBX01K02. It is infrastructure for the bus and module power.
6. Account for the no-hot-swap specification.
ABB’s current hardware selector lists Hot swap: No. Cabinet work should therefore follow the plant’s approved shutdown, isolation, and ESD procedures rather than assuming the extender can be removed from a powered system.
7. Verify the exact ordering number.
For procurement, use 2VAA008580R1 together with the designation cHBX01K02. Similar-looking accessories have different mechanical positions and system functions.
FAQ
What is ABB cHBX01K02?
ABB cHBX01K02 is a Compact Horizontal Bus Extender Kit for the Symphony Plus SD Series. It creates a horizontal bus segment and consists of one cHBX01L and one cHBX01R.
What is the ABB part number for cHBX01K02?
The ABB article/order number is 2VAA008580R1. ABB’s current hardware selector lists the product as active.
What does the cHBX01K02 kit contain?
It contains one cHBX01L compact horizontal bus extender and one cHBX01R compact horizontal bus extender. The L version is installed on the left side of the horizontal row; the R version is installed on the right.
What communication bus does cHBX01K02 use?
It is designed for the redundant I/O bus of the Symphony Plus SD Series. ABB specifies the bus at 4.0 Mbps.
Does cHBX01K02 provide 24 VDC power?
Yes. The cHBX01L includes the module-power connection, and ABB specifies a maximum current of 3.0 A at 24 VDC for the bus extender kit.
Is cHBX01K02 a fiber-optic bus extender?
No. This is an electrical horizontal bus extender kit. ABB’s cRBX01 is the separate fiber-optic remote bus extender used for longer-distance connections.
What is the difference between cHBX01K02 and HBX01K02?
Both are horizontal bus-extension kits, but cHBX01K02 uses the compact cHBX01L/cHBX01R components, while HBX01K02 uses the larger HBX01L/HBX01R arrangement. ABB lists them as separate products.
What should be checked before purchasing a replacement?
Confirm cHBX01K02, ABB ordering number 2VAA008580R1, the SD Series architecture, horizontal mounting arrangement, and whether the project needs the complete L/R kit or only one individual extender. Also verify the required SPK800 inter-row cable and bus termination arrangement before installation.
