Honeywell SV2 Series User Manual page 6

SV2 Series Safety Shut-off Valves
Environmental Usage Conditions:
Ambient Conditions
• The valve is only suitable for installation in enclosed rooms.
• Condensation and dew in and on the valve are not permitted.
• No icing permitted
• Avoid direct sunlight or radiation from red-hot surfaces on the valve.
• Avoid corrosive influences, e.g. salty ambient air or SO2.
• Permitted relative humidity: min 5%, max 95%.
• The valve shall only be stored/installed in enclosed rooms/buildings.
• Long-term use in the upper ambient temperature range accelerates the aging of the elastomer materials and reduces the
service life.
• This valve is not suitable for cleaning with a high-pressure cleaner and/or cleaning products.
Mechanical Conditions
• Gaseous fuel must be clean and dry in all temperature conditions and must not contain condensate.
Logistics
• Protect the valve from external forces (blows, shocks, vibration).
• The ambient conditions described in this document apply to transport.
SECURE MODBUS® COMMUNICATION
For SV2 Series valve configuration and monitoring, Modbus communication utilizing an RS-485 BUS is used.
The SV2 Series valves include a Honeywell-specific secure Modbus protocol. Standard Modbus RTU protocol is used, however,
safety-related and writable parameters are covered by a secure layer. As a result, they are only writable when accessed using a
valid user access level and an appropriate user interface, which are designed to work with the secure layer. Read only Modbus
addresses can be accessed without the Honeywell user interface or the secure Modbus layer
USER ACCESS LEVELS
A 3-level user access level framework has been implemented into the SV2 Series valves, consisting of the User, Installer and
OEM levels.
• OEM Read/write rights with the ability to assign read/write parameter groups for the OEM and Installer levels. OEM is
defined at the original provider/programmer of the valve.
• Installer Read/write rights as assigned by the OEM.
• User Read only rights via HMI/PC Tool and the ability to reset fault codes via valve display.
Valves are shipped with default OEM and Installer passwords pre-configured. These passwords have to be
changed before the valve can be used in an application without user observation.
NOTES:
• Default passwords are automatically pre-filled in the appropriate field during the initial user login.
• The OEM can choose to create the Installer main password or allow the Installer to assign it at the initial login.
• See CHAPTER 6 ACCESS LEVELS for detailed information regarding OEM/Installer password configuration, access level
assignments and password reset procedures.
Forgetting to change the default password results in persistent lockout when the secured session is terminated. This is a
security measure that avoids using a valve in unsecure mode (without proper password configuration).
Should the Installer and/or OEM main access level passwords be lost, password reset is possible, if the reset mechanisms were
enabled by the OEM. The reset mechanism will vary between the Installer and OEM levels. Note that cycling of the valve or user
interface power will not defeat this methodology.
A detailed description of the user access levels and reset mechanisms can be found in Chapter 6: Access Levels in this
document.
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