Description
Product Overview
The ABB NMBC-01 64079760 is associated with the connection hardware used on the panel/printer communication link of the ABB Advant Controller 80 (AC 80). The NMBC-01 provides a termination and connection point for the twisted-pair communication bus, allowing compatible equipment such as a CDP 80 control panel or an NAPI alarm-printer interface to connect to the controller’s RS-485 panel/printer link. The AC 80 documentation identifies this link as supporting Modbus protocol communications.
In a legacy drive-control installation, this component helps establish the physical communication path between the controller and connected operator or peripheral devices. Correct installation depends on the intended network mode, cable arrangement, device connections, and power requirements of the overall link. The NMBC-01 should not be confused with an independent programmable controller or assumed to be a universal Modbus adapter for modern ABB drives. Its documented role is specific to the AC 80 panel/printer connection arrangement.
For replacement procurement, compare the original board’s complete part number, connector layout, and wiring before ordering. The model is also advertised under the ordering number 64079760B in some supplier catalogs, but the suffix difference should be reconciled against the original label and bill of materials. For used or surplus stock, request actual-unit photographs and a clear statement of the testing performed.
Product Introduction
Communication faults in a legacy AC 80 installation can originate in cabling, termination, or connected devices—not necessarily in the controller itself. The ABB NMBC-01 provides the connection and termination hardware for the controller’s panel/printer communication link.
When replacing it, verify the ordering code, connector arrangement, cable type, and network configuration. Confirm that the offered item matches the installed assembly before returning the system to service.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Model | NMBC-01 |
| Part number supplied | 64079760 |
| Related catalog listing | 64079760B; verify suffix |
| Manufacturer | ABB |
| System family | Advant Controller 80 (AC 80) |
| Product type | Modbus termination / connection unit |
| Primary function | Provides a physical connection point for the panel/printer communication link |
| Communication protocol | Modbus on the AC 80 panel/printer link |
| Electrical interface | RS-485, twisted-pair bus |
| Connected equipment | Compatible CDP 80 control panel and NAPI alarm-printer interface, depending on system configuration |
| Bus topology | Point-to-point or multidrop, according to the configured Modbus system |
| Maximum communication speed | Up to 38.4 kbit/s for AC 80 Modbus, subject to configuration |
| Cable | Shielded twisted-pair cable specified by the applicable AC 80 documentation |
| Supply requirements | Follow the applicable NMBC-01 wiring diagram and connected equipment requirements |
| Mounting | Confirm the original assembly’s mounting arrangement |
| Protection rating | Not verified for this exact part number |
| Operating temperature | Confirm from the applicable hardware documentation |
| Condition | New surplus, used, or tested status must be confirmed |
Specification caution: The communication speed and interface details above describe the AC 80 Modbus link, not a guaranteed standalone performance rating for the assembly. Do not apply specifications from the similarly named NMBA-01 Modbus adapter to the termination unit.
NMBC-01 64079760
Related Products
These components belong to the same AC 80 communication environment or may be encountered during maintenance. They are not automatic replacements for .
- CDP 80 Control Panel — Operator interface that can connect to the AC 80 panel/printer link.
- NAPI-01 — Alarm-printer interface for compatible printer connections.
- NCPC-30 — AC 80 control-panel cable referenced in system connection diagrams.
- NPCU-01 — RS-232/RS-485 converter referenced in AC 80 Modbus documentation.
- PM820 — AC 80 processor and power-supply board family; verify the exact board designation.
- PM825 — AC 80 NCB board designation documented for relevant controller configurations.
- TC820 — AC 80 terminal board designation.
- NMBA-01 — A separately named ABB Modbus adapter; do not treat it as interchangeable with .
Frequently Asked Questions
1. What is the ABB used for?
It is a Modbus termination and connection unit used with the panel/printer communication link of the ABB AC 80 controller. It provides the physical bus connection for compatible operator or peripheral equipment.
2. Is a Modbus adapter or a termination unit?
The AC 80 system documentation describes as a Modbus termination unit. It should not be confused with NMBA-01, which ABB documentation identifies as a Modbus adapter module for supported drives.
3. Is part number 64079760 the same as 64079760B?
Some supplier listings associate 64079760B with . The exact equivalence of the supplied 64079760 number and the suffixed variant is not established by the sources reviewed. Check the original nameplate, parts list, and connector layout before approving a substitution.
4. Can the be replaced while the AC 80 system is running?
Do not assume that live replacement is permitted. Follow the plant’s isolation procedure and the applicable AC 80 maintenance instructions. Confirm whether removing the connection unit will interrupt communication with operator panels or other devices.
5. Does support modern Ethernet-based Modbus TCP?
The documented AC 80 panel/printer link is a serial RS-485 Modbus connection. should not be specified as an Ethernet or Modbus TCP interface without separate documentation confirming that capability.
6. What should be checked before installation?
Verify the full part number, terminal assignments, cable shielding, connected devices, network mode, and bus termination arrangement. After installation, check communication with the connected equipment and confirm that the AC 80 reports no link-related faults.
7. How should I verify a surplus ?
Request photographs of the actual unit and its label, inspect the connectors and terminals, and ask for evidence of any electrical or functional testing. Confirm whether the item is unused surplus, used, or repaired, and obtain written warranty terms.
Procurement recommendation: For 64079760, prioritize confirmation of the AC 80 application and the exact suffix. Its documented purpose is serial communication connection and termination; accurate part identification is more important than broad claims that it supports multiple unrelated industrial protocols.
