Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | GRVSW-664FA |
| Manufacturer | Yokogawa |
| Vendor Model | MACH104-20TX-FR |
| Product Family | MACH104 |
| Network Type | Vnet/IP |
| Switch Type | Managed Layer 2 switch |
| Total Ports | 24 |
| RJ-45 Ports | 24, including 4 dual-purpose RJ-45/SFP ports |
| SFP Capability | 4 combo ports |
| Power Input | Dual AC |
| Nominal Input | 100–240 VAC, 50–60 Hz |
| Operating Input Range | 90–265 VAC, 47–63 Hz |
| Maximum Power Consumption | 35 W |
| Operating Temperature | 0 to +50°C |
| Storage Temperature | -20 to +85°C |
| Humidity | 10–95% RH, non-condensing |
| Protection Rating | IP30 |
| Mounting | 19-inch rack, 1U |
| Dimensions | Approx. 448 × 44 × 345 mm |
| Weight | Approx. 4.4 kg |
| Fault Contact | 1 A max., 60 VDC max. |
Yokogawa’s documentation identifies the GRVSW-664FA as the AC-input redundant-power MACH104 model. The hardware specification gives 24 ports, dual AC inputs, 90–265 VAC operating range, 35 W maximum consumption, 0–50°C operating temperature, IP30 protection, and 19-inch rack mounting.
Product Introduction
The Yokogawa GRVSW-664FA is a managed Layer 2 industrial network switch intended specifically for Vnet/IP systems. It is based on the MACH104-20TX-FR hardware platform and provides 24 Ethernet ports, with four ports supporting either RJ-45 or SFP operation. The dual AC power inputs are intended to support redundant power arrangements in Vnet/IP control networks.
This is not simply a general-purpose Ethernet switch that happens to use industrial connectors. Yokogawa states that its Recommended Switches are supplied with configurations customized for Vnet/IP and should be used specifically for Vnet/IP networks. The distinction matters when maintaining a CENTUM VP or related Yokogawa control network, particularly where existing switch configuration, redundancy, and network diagnostics are part of the validated system.
Application Scenarios & Field Pitfalls
Engineering Pain Point
Vnet/IP networks carry control-system traffic between FCS, HIS, engineering stations, and other system components. A switch replacement that appears electrically compatible can still cause problems if the port configuration, Vnet/IP topology, redundancy arrangement, or stored switch configuration does not match the existing installation.
Typical Applications
- CENTUM VP DCS networks — connecting Vnet/IP stations and control-system equipment.
- Large process plants — centralized and distributed control networks requiring managed switching.
- Power generation facilities — Vnet/IP communication infrastructure between control-system nodes.
- Industrial Ethernet cabinets — rack-mounted switching with dual AC power feeds.
Technical Pitfalls to Avoid
- Do not treat GRVSW-664FA as a generic managed Ethernet switch. Yokogawa specifically states that its Recommended Switches are dedicated to Vnet/IP and that use on non-Vnet/IP networks is not supported.
- Do not confuse GRVSW-664FA with GRVSW-663FA. Both use the MACH104 family and provide 24 ports, but GRVSW-663FA has single AC power, while GRVSW-664FA has redundant AC power inputs.
- Both power inputs should be considered during commissioning. Yokogawa specifically notes that the redundant-power model uses P1 and P2 and that failure to use both can generate a power-fail alarm.
- Do not assume every SFP is interchangeable. Yokogawa provides a defined list of compatible SFP modules for its Recommended Switches. For example, the documented options include 1000BASE-LX, 1000BASE-LH, 1000BASE-LH+, and 100BASE-FX variants with different fiber types and transmission distances.
- Back up the switch configuration before replacement. Yokogawa provides an Auto-Configuration Adapter (ACA) specifically for saving and loading Recommended Switch configurations. This can be important when replacing a switch without redesigning the existing Vnet/IP network.
Related Products
- GRVSW-663FA — MACH104-20TX-F single-AC-power version; similar 24-port architecture but lacks the redundant AC input arrangement.
- GRVSW-665FA — MAR1040-family managed Layer 2 switch with a different 16-port architecture and fiber-oriented configuration.
- GRVSW-668FA — managed Layer 3 switch for Vnet/IP BUS1; intended for inter-domain networking rather than ordinary same-domain Layer 2 switching.
- GRVSW-671FA — managed Layer 3 switch for Vnet/IP BUS2; function differs from the GRVSW-664FA L2 switch.
- GRVSW-660FA — RS40-family managed Layer 2 switch with redundant DC power and DIN-rail mounting.
- GRVSFP-675FA — 1000BASE-LX SFP for compatible Recommended Switches; supports single-mode or multimode fiber under the specified conditions.
- GRVSFP-696FA — 1000BASE-LH SFP for long-distance single-mode fiber connections, with up to 80 km specified transmission distance under the documented conditions.
- GRVACA-677FA — Auto-Configuration Adapter used to save/load Recommended Switch configurations.
- GRVCAB-678FA — terminal cable used for configuration and CLI access through the switch’s V.24 interface.
Procurement Check
Before purchasing GRVSW-664FA, verify:
- Exact Yokogawa model: GRVSW-664FA
- Vendor hardware designation: MACH104-20TX-FR
- 24-port configuration
- Required Vnet/IP domain and topology
- Dual AC power arrangement
- Existing SFP type and fiber infrastructure
- Current switch configuration and backup availability
- ACA configuration, if used
- Existing Vnet/IP redundancy arrangement
- Rack space and ventilation
- Firmware/configuration compatibility
- Condition of RJ-45 and SFP interfaces
Bottom line: the Yokogawa GRVSW-664FA is a 24-port managed Layer 2 Vnet/IP Recommended Switch based on the MACH104-20TX-FR, with redundant AC power inputs and four RJ-45/SFP combo ports. The key procurement issue is not simply port count; it is preserving the validated Vnet/IP configuration, power redundancy, SFP arrangement, and network topology of the existing control system.
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