Description
Product Overview
The ABB Bailey NTMP01 is a Multi-Function Processor Termination Unit used in legacy INFI 90 and Harmony control systems. It provides the external serial connections and termination circuitry required by compatible processor and communication modules. Rather than executing control logic itself, the NTMP01 serves as an interface between the host module and connected serial devices. ABB’s product instruction describes applications involving multi-function processors, INFI-NET transfer modules, and multi-function processor interface modules.
The unit supports two isolated RS-232-C ports, or a configuration with one isolated RS-232-C port and one non-isolated RS-485 port. The selected interface depends on the hardware configuration and jumper settings. A separate serial connection can link an analog or digital control station through an NTCS04 Control I/O Termination Unit in supported installations. These configuration details matter during replacement because a physically compatible board may still be unsuitable if its port settings, cabling, or companion module do not match the original system.
For maintenance and procurement teams, the NTMP01 should be sourced as a system-specific termination assembly. Before ordering, identify the host module, check the original jumper configuration, and confirm the required cable type. Request photographs of the actual unit, connector condition, and revision markings. For used or refurbished stock, ask for documented checks of serial-port operation and termination connections; a basic visual inspection is not enough to establish communication reliability in a running DCS.
Product Introduction
The NTMP01 is designed for rack-based Bailey control installations where processor and communication modules need defined external serial interfaces. Depending on the application, the unit can support data connections, diagnostic terminals, or a control-station serial link. The applicable manual specifies port configuration and wiring requirements, so the intended use must be established before installation.
When replacing the unit, document existing wiring and jumper positions before disconnecting any cables. Confirm the correct termination panel and module cable for the installation; the NTMP01 instruction and associated system documentation identify specific companion hardware. Follow the approved site isolation procedure and validate serial communications and control-station functions after installation. Do not assume that settings from another NTMP01 installation will be correct for your system.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product model | |
| Manufacturer | ABB Bailey Controls |
| Product type | Multi-Function Processor Termination Unit |
| System family | Bailey INFI 90 / Harmony |
| Serial interface configuration | Two isolated RS-232-C ports, or one isolated RS-232-C plus one non-isolated RS-485 port |
| Control-station connection | Serial link for a compatible analog or digital control station |
| Host hardware | Supported multi-function processor and communication-interface configurations |
| Compatible cable | NKTU01 or NKTU11 in documented configurations |
| Mounting | NFTP01 Field Termination Panel in documented arrangements |
| Board format | Approximately 7 × 7 inches, as reported in supplier documentation |
| Operating temperature | 0–70 °C reported in supplier documentation; confirm against the applicable manual |
| Supply voltage | No standalone supply rating verified here; check the host-system wiring documentation |
| Protection rating | Not verified |
| Weight | Supplier listings vary; verify the actual unit and shipping documentation |
The interface configuration and companion hardware are described in the instruction and related documentation. Mechanical and environmental values above are based on supplier documentation and should be confirmed for the exact revision.
NTMP01
Related Products
These components are associated with documented applications, but they are not interchangeable with the termination unit itself.
- ABB IMMFP01 — Multi-Function Processor used with in documented configurations.
- ABB IMMFP02 — Related multi-function processor; verify the applicable termination and cable requirements.
- ABB IMMFP03 — Processor used in configurations that may require an IMMPI01 or IMMPI02 interface.
- ABB IMMPI01 / IMMPI02 — Multi-function processor interface modules used in specified system arrangements.
- ABB INIIT02 — INFI-NET transfer module whose termination and jumper configurations are documented in the system literature.
- ABB NTCS04 — Control I/O Termination Unit used for the documented serial connection to a control station.
Frequently Asked Questions
1. What is the ABB Bailey ?
It is a Multi-Function Processor Termination Unit for compatible Bailey INFI 90 and Harmony control-system configurations. It provides serial-interface termination rather than acting as a standalone processor.
2. Does the support RS-485?
Yes, in the documented configuration where one port is set for non-isolated RS-485 and the other remains isolated RS-232-C. The required jumper settings must match the intended application.
3. Which cable is required?
NKTU01 is identified for supported configurations; NKTU11 is also listed for an alternative cable construction. Verify the cable against the host module and installation documentation before ordering.
4. Can the be used with any INFI 90 processor?
No. Compatibility depends on the processor or interface module, termination arrangement, cable, and application. Consult the applicable module instruction before treating it as a direct replacement.
5. Does it require jumper configuration?
Yes. The instruction describes jumper and configuration settings for its serial ports and diagnostic applications. Record the original settings and confirm the correct configuration for the replacement.
6. What should be checked when buying refurbished stock?
Confirm the model marking, connector condition, board revision, and included accessories. Request test evidence for the required serial interfaces and verify that the unit can be configured for the intended host system.
7. Can it be replaced while the control system is running?
Do not assume it is safe to replace while energized. Follow the applicable ABB instructions and site isolation procedures, especially where serial links support active control or diagnostic functions.
Procurement Recommendation
The ABB Bailey is a suitable candidate when maintaining a compatible INFI 90 or Harmony installation, provided the exact host-module configuration is confirmed. The main purchasing risks are incorrect port configuration, a mismatched companion cable, and assuming that all termination arrangements use identical jumper settings.
Before approving a purchase, confirm the original part marking, processor or interface module, required RS-232-C/RS-485 arrangement, and cable type. For refurbished stock, request actual-unit photographs and documented serial-interface testing. After installation, verify communication, diagnostic access, and any connected control-station functions using the site’s approved commissioning procedure.
