Honeywell SmartLine STIW400 User Manual Download

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1. Introduction

1.1. Purpose

Revision 1

SmartLine Wireless Temperature and Universal I/O User's Manual

1. Introduction

1.1 Purpose

This manual describes the Honeywell SmartLine Wireless Transmitter function, operation and
maintenance.

1.2 Scope

The manual includes:
Details of topics that relate uniquely to the Honeywell SmartLine Wireless Transmitter

1.3 OneWireless network overview

OneWireless is an all digital, two-way communication mesh network that interconnects industrial
field sensors to a central system.

OneWireless has defined standards to which field devices and operator stations communicate
with one another. The communications protocol is built as an "open system" to allow all field
devices and equipment that are built to OneWireless standard to be integrated into a system,
regardless of the device manufacturer. This interoperability of devices using OneWireless
technology is to become an industry standard for automation systems.

1.4 Security Considerations

SmartLine wireless transmitters conform to the security features specified in the ISA100.11a
standard. The security aspects of the ISA100.11a standard include multi-level authentication for
endpoint validation, data privacy consisting of network and end to end encryption, network
diversity using spread spectrum technology and time slot allocation, and data integrity using
quality and latency attributes. This section provides an overview of considerations for overall
security of SmartLine Wireless Temperature Multi I/O transmitter. Refer OneWireless Network
Planning and Installation Guide (OWDOC-X253-en-320A) for detailed information for planning
secure deployment of the transmitter.

To reduce security threats, wireless field device network ensures that all process data is 128-bit
encrypted. The data is encrypted at the source and decrypted at the destination to provide end-to-
end security for the process data. In addition to data encryption, ISA100.11a standard requires all
the devices to be authenticated before joining the network. SmartLine wireless transmitters
supports infrared authentication key distribution mechanism. This mechanism is very secure
since it requires the user to be physically located near the device to authenticate it. Devices can
also be authenticated by over the air provisioning. The keys are encrypted when distributed using
over the air provisioning mechanism. It is recommended to configure a suitable key rotation
period to further secure the network.

Prior to deploying the transmitter, a radio frequency assessment is recommended to determine
the number and placement of access points that provide adequate network coverage throughout
the network. To ensure availability, the placement of wireless transmitters and other wireless
network components should consider signal quality under various environmental conditions.
Signal quality can be monitored by inspection of the Receive Signal Strength Indicator (RSSI)
and Receive Signal Quality Indications (RSQI). The RSSI and RQSI for mesh links can be
viewed on the Wireless Device Manager (WDM) network display.