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About SIIS
SIIS has produced a Recommended Practice (RP) document for three communication protocols between Subsea Control Modules (SCMs) and subsea sensors
Our Members
The 28 member companies consisting of Operators, control system suppliers and instrument suppliers worked together to define a standard for instrument interfaces.
SIIS Deliverables
SIIS RP document and API Standard Text will be available soon.

Welcome to SIIS

The Subsea Instrumentation Interface Standardisation (SIIS), a JIP run by OTM Consulting, was established in 2003.  With a remit to create an open standard for the benefit of the oil and gas industry as a whole, SIIS recently finished producing the Recommended Practice (RP) and text for an API Standard, which defines three instrument interface protocols for communication between subsea control modules and subsea sensors: 

Level 1: Analogue Devices:  These devices are 4-20mA sensors, 2 wire loop powered analogue output sensing devices.

Level 2: Digital Serial Devices (CANopen): 

Level 3: Ethernet TCP/ IP Devices.  

SIIS has 27 member companies consisting of controls systems suppliers, instrument suppliers and operators.

Although the SIIS JIP has now delivered Levels 1-3 of the SIIS Recommended Practice, it is still possible to join the JIP.  For further details, please see membership tab.