Description
ABB HBS01-EPD Mounting Base
Product Introduction
In an SD Series cabinet, the mounting base is the part that determines how the I/O module reaches the field wiring and HN800 bus. ABB HBS01-EPD is a full-size horizontal Module Termination Unit designed for externally powered field devices and differential signal applications. It provides the mechanical mounting, field termination, and bus connection required by compatible Symphony Plus SD Series I/O modules.
The important distinction is that ABB HBS01-EPD does not perform the I/O function itself. The active I/O electronics are supplied by the module installed on the base. ABB lists HBS01-EPD as compatible with a broad group of singular analog, digital, and pulse I/O modules, making it useful when maintaining or expanding an existing HN800 I/O installation without changing the basic cabinet architecture.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | HBS01-EPD |
| Manufacturer | ABB |
| Product Family | Symphony Plus SD Series I/O |
| Product Type | Module Termination Unit / Mounting Base |
| Configuration | Singular |
| Channels | 16 |
| Form Factor | Full-size |
| Approx. Form Factor Size | 190 mm tall × 45 mm wide |
| Mounting Orientation | Horizontal row |
| Mounting Rail | Standard 35 mm DIN rail |
| HN800 Bus Length | 150 mm |
| Hot Swap | No |
| Field-Power Arrangement | Externally powered field signals / differential inputs |
| Field Connections | Two 16-point headers |
| Terminal Interface | Two pluggable 16-point terminal blocks or SPK0x_-yy marshaling cables |
| Supported Modules | AI01, AI02, AI05, AI06, AO01, AO02, AO05, AD11, DI01, DI02, DI03, DI04, DO01, DO02, DO05, PI01 |
| Bus Architecture | HN800 I/O bus |
| MTBF | 6,802,416 hours, per MIL-HDBK-217-FN2 |
| MTTR | 8 hours |
| Protection / Compliance | RoHS and WEEE compliant |
| Typical Application | Symphony Plus SD Series analog and digital I/O termination |
ABB’s current data sheet specifies two 16-point headers for direct field termination or connection through SPK marshaling cables. The base is also mechanically keyed, where configured, to help prevent installation of an incorrect I/O module.
Application Scenarios & Practical Pain Points
1. Externally Powered Field Devices
HBS01-EPD is specifically intended for field signals where the field devices have an external power arrangement. That makes it different from the FPH/FPN base configurations, where the field-power distribution arrangement is part of the base architecture.
2. Analog and Digital SD I/O
The base supports both analog and digital SD Series modules. Depending on the installed module, the same base architecture can support analog inputs, analog outputs, digital inputs, digital outputs, and pulse inputs.
HBS01-EPD
3. Existing Symphony Plus Cabinet Maintenance
For maintenance work, can be important when the active I/O module is still serviceable but the physical termination base has suffered terminal damage, mechanical damage, or wiring-related deterioration. The replacement must match the installed field-power arrangement—not merely the module’s electrical function.
4. Marshaling-Cable Installations
The two 16-point headers can accept pluggable terminal blocks or SPK0x_-yy marshaling cables. This gives the cabinet designer a choice between direct field-wire termination and connection to third-party termination hardware.
Related Products
- ABB HBS01-FPH — Horizontal full-size base with switched-hot field-power arrangement; not the same field-power architecture as .
- ABB HBS01-FPN — Horizontal full-size base with switched-neutral field-power arrangement.
- ABB VBS01-EPD — Vertical-column counterpart for externally powered field signals.
- ABB HBS01-CJC — Full-size base associated with cold-junction-compensation applications.
- ABB DO05 — 16-channel electromechanical relay output module supported by .
- ABB DO02 — 16-channel open-collector digital output module supported by .
- ABB DI01 — SD Series digital input module supported by .
- ABB AI02 — SD Series analog input module supported by .
- ABB PI01 — SD Series pulse input module supported by .
ABB’s hardware selector explicitly lists as compatible with these SD Series modules. Compatibility with the base does not mean the modules have identical field-power, signal, or configuration requirements.
Engineer’s Guide — Field Pitfalls to Avoid
1. Do not treat as an I/O module
There is no analog conversion, digital sensing, relay switching, or pulse processing performed by the base itself. The installed SD Series module provides that function.
2. Verify the field-power architecture
The EPD designation matters. is intended for externally powered field signals or differential inputs. Replacing an FPH/FPN base with EPD—or the reverse—without checking the cabinet wiring can create a field-power mismatch.
3. Check the exact I/O module and keying
ABB lists a large number of compatible modules, but compatibility is not a blanket statement that every SD Series module can be installed. The hardware selector provides module-specific compatibility and keying information.
4. Do not assume hot replacement
ABB specifies Hot Swap: No for . Cabinet work should therefore follow the site’s approved isolation and maintenance procedure rather than assuming the base can be removed while the HN800 system remains energized.
5. Inspect the termination hardware on used parts
For a used , inspect the 16-point headers, terminal interfaces, DIN-rail latch, bus contacts, mechanical keying components, and enclosure condition. A base can have a correct part number while still having field-wiring or connector damage.
6. Confirm horizontal versus vertical installation
is a horizontal-row full-size base. ABB separately lists VBS01-EPD for vertical-column installations. Do not assume the two are interchangeable simply because both use the EPD field-power concept.
FAQ
What is ABB ?
ABB is a full-size Module Termination Unit (MTU) and mounting base for Symphony Plus SD Series I/O. It provides the mechanical, field-termination, and HN800 bus interface for a compatible I/O module.
How many channels does support?
The base is specified for 16 field signal channels and uses two 16-point headers for field connections.
Which modules can be installed on ?
ABB lists AI01, AI02, AI05, AI06, AO01, AO02, AO05, AD11, DI01, DI02, DI03, DI04, DO01, DO02, DO05, and PI01 as supported modules. Always check the exact module’s current ABB compatibility information before replacement.
Is a backplane?
It is often described commercially as a backplane, but ABB’s own documentation identifies it as a Module Termination Unit / mounting base. For procurement and engineering documentation, the ABB terminology is preferable because the component also provides field termination and mounting functions.
What is the difference between and HBS01-FPH?
The principal difference is the field-power arrangement. is intended for externally powered field signals or differential inputs, while HBS01-FPH is a switched-hot configuration. The correct choice depends on the installed field wiring and I/O module application.
Can be mounted vertically?
No. ABB identifies as a horizontal-row full-size base. The corresponding vertical EPD option is VBS01-EPD.
Is hot-swappable?
ABB’s current data sheet lists Hot Swap: No. Do not remove or replace the base under power unless the site’s engineering procedure and ABB documentation explicitly permit the specific maintenance activity.
What should procurement verify before purchasing ?
Match the exact designation, then verify the installed I/O module, horizontal mounting requirement, EPD field-power arrangement, bus configuration, terminal/header condition, and mechanical keying. For a used spare, the physical condition of the bus contacts and 16-point field connectors deserves as much attention as the part number.
