Yokogawa NM29*A Network Communication Module
The Yokogawa NM29*A, also cataloged as the NM29 Network Communication Module, operates as a dedicated hardware component for high-speed data exchange and redundant port routing within Yokogawa distributed control system networks.
Suffix Breakdown & Model Matrix
The style code revision specifies physical connector layouts and circuit design updates for the base network module series.
| Code Element | Specification / Description |
|---|---|
| NM29 | Base model designation for network communication module series |
| *A | Style code Revision A specifying circuit design layout and physical interface revision |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | NM29*A |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 1.3 kg |
| Dimensions | 330 mm x 250 mm x 60 mm |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 24 VDC / 5 VDC backplane powered |
| Module Type | Network Communication Module / Network Interface |
| Redundancy | Dual-redundant port management |
| System Compatibility | Yokogawa CENTUM VP / CS 3000 |
Channel-to-Channel Isolation and DCS Network Integration
The Yokogawa NM29*A coordinates deterministic data transmission between node controllers and field instrumentation networks. To prevent electrical transients from propagating across communication lines, the board incorporates channel-to-channel isolation circuits between field-side buses and core backplane logic. The module processes fieldbus packets including 4-20 mA HART loop protocol telemetry and FOUNDATION Fieldbus field device signals, maintaining signal integrity under heavy data traffic. Integrated hardware diagnostic routines monitor bus continuity and automatically failover to secondary redundant communication ports when link degradation or packet corruption is detected.
Frequently Asked Questions
Q: How does the NM29*A execute redundant port failover during a network cable fault?
A: The module continuously monitors line integrity on both primary and secondary communication channels. Upon detecting packet loss or physical link disconnect on the active port, the internal communication processor transfers data traffic to the backup port without interrupting scan timing or system logic execution.
Q: Are there hardware constraints when replacing the NM29*A in an active rack assembly?
A: Hot-swapping requires that the secondary redundant communication module is fully powered, synchronized, and carrying active bus traffic before removing the target module to prevent node disconnects.
Q: What grounding provisions protect the NM29*A against high-frequency bus interference?
A: The module relies on ground contacts integrated into the chassis guide rails and shielded connector housings, directing high-frequency electrical noise straight to the common cabinet earth ground plane.
Field Installation Guidelines
- Align the module card edges with the subrack guide rails and insert the card smoothly into the target slot until the ejector levers lock firmly into position.
- Ensure both primary and secondary network cables are securely connected to the designated RJ-45 or fiber optic ports prior to activating backplane communication loops.
- Maintain dedicated cable tray routing for network communication lines, keeping them segregated from high-power AC distribution lines and motor drive leads.
- Verify that the system cabinet grounding bus is bonded to protective earth (PE) using low-impedance copper conductors.
- Inspect link LEDs on the module front panel post-powering to confirm link establishment and proper node synchronization.
Yokogawa NM29*A Network Communication Module
Yokogawa NM29*A Network Communication Module
The Yokogawa NM29*A, also cataloged as the NM29 Network Communication Module, operates as a dedicated hardware component for high-speed data exchange and redundant port routing within Yokogawa distributed control system networks.
Suffix Breakdown & Model Matrix
The style code revision specifies physical connector layouts and circuit design updates for the base network module series.
| Code Element | Specification / Description |
|---|---|
| NM29 | Base model designation for network communication module series |
| *A | Style code Revision A specifying circuit design layout and physical interface revision |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | NM29*A |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 1.3 kg |
| Dimensions | 330 mm x 250 mm x 60 mm |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 24 VDC / 5 VDC backplane powered |
| Module Type | Network Communication Module / Network Interface |
| Redundancy | Dual-redundant port management |
| System Compatibility | Yokogawa CENTUM VP / CS 3000 |
Channel-to-Channel Isolation and DCS Network Integration
The Yokogawa NM29*A coordinates deterministic data transmission between node controllers and field instrumentation networks. To prevent electrical transients from propagating across communication lines, the board incorporates channel-to-channel isolation circuits between field-side buses and core backplane logic. The module processes fieldbus packets including 4-20 mA HART loop protocol telemetry and FOUNDATION Fieldbus field device signals, maintaining signal integrity under heavy data traffic. Integrated hardware diagnostic routines monitor bus continuity and automatically failover to secondary redundant communication ports when link degradation or packet corruption is detected.
Frequently Asked Questions
Q: How does the NM29*A execute redundant port failover during a network cable fault?
A: The module continuously monitors line integrity on both primary and secondary communication channels. Upon detecting packet loss or physical link disconnect on the active port, the internal communication processor transfers data traffic to the backup port without interrupting scan timing or system logic execution.
Q: Are there hardware constraints when replacing the NM29*A in an active rack assembly?
A: Hot-swapping requires that the secondary redundant communication module is fully powered, synchronized, and carrying active bus traffic before removing the target module to prevent node disconnects.
Q: What grounding provisions protect the NM29*A against high-frequency bus interference?
A: The module relies on ground contacts integrated into the chassis guide rails and shielded connector housings, directing high-frequency electrical noise straight to the common cabinet earth ground plane.
Field Installation Guidelines
- Align the module card edges with the subrack guide rails and insert the card smoothly into the target slot until the ejector levers lock firmly into position.
- Ensure both primary and secondary network cables are securely connected to the designated RJ-45 or fiber optic ports prior to activating backplane communication loops.
- Maintain dedicated cable tray routing for network communication lines, keeping them segregated from high-power AC distribution lines and motor drive leads.
- Verify that the system cabinet grounding bus is bonded to protective earth (PE) using low-impedance copper conductors.
- Inspect link LEDs on the module front panel post-powering to confirm link establishment and proper node synchronization.
