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3.1
FDAP description
The Field Device Access Point (FDAP) is a key component to the Honeywell
OneWireless system, a secure wireless network for industrial applications. It is a
ruggedized industrial radio device intended for use in hazardous location to provide
wireless connectivity for wireless sensor networks. It serves as a gateway between the
wired DCS network and wireless field instruments as depicted in Figure 1.
FDAP uses IEEE 802.15.4 standard based Direct Sequence Spread Spectrum (DSSS)
technology. FDAP has two IEEE 802.15.4 radios which enhances communication in a
complex multi-path environment and in large communication areas. It has an Ethernet
interface for connection to the backbone network and an ISA100 radio. It is a standalone,
pole mountable, intrinsically-safe device, suitable for use in Class I, Division 1, and Zone
1 hazardous locations. It is normally installed in the same area where industrial field
instruments are installed. FDAP is the Routing Access Point for ISA100 field
instruments. It connects the ISA100 network to the wired network. It operates at 24V DC
and 110/120V AC power, 10/100 Gigabit Ethernet and has dual antennas for diversity.
FDAP is an industrial meshing access points providing secure and reliable wireless
coverage for ISA100.11a field instruments only. Once deployed in the field, FDAPs self-
discover and self-organize into a managed, secure, and redundant wireless field
instrument mesh network. It acts as a bridge between the sensor network and the wireless
or wired infrastructure (backhaul). It allows you to achieve wired-like performance using
wireless field instruments. With FDAPs, wireless field instruments do not have to route
data from other field instruments. You get five years or more battery life from the field
instruments at one-second update rate. The FDAP receives and transmits ISA100.11a
data simultaneously using the entire 15 channels available on the 2.4 GHz ISM band as
defined in IEEE 802.15.4.
3.2
Types of FDAPs
There are two types of FDAPs. They are: standalone FDAP and embeddable FDAP.
Standalone FDAP
The standalone FDAP has a radio board and an autonomous power subsystem that
operates within a range of AC/DC inputs. Standalone FDAP implements IEEE 802.15.4
radio only. FDAP hardware is designed using intrinsically safe (IS) design technique and
it can used in Div1/Zone1 environment. The IS design does not support all power
options. FDAP is therefore available in two models – IS and non-IS. The standalone
R200
OneWireless Field Device Access Point User's Guide
October 2010
3. About FDAP
Honeywell Confidential & Proprietary
23
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