49
58-640 PULSAR Model R96 Pulse Burst Radar Transmitter - F
OUNDATION
fieldbus
™
Instruction Manual
5.3
F
OUNDATION
fieldbus Segment Checklist
There can be several reasons for a F
OUNDATION
fieldbus
™
installation to be in a faulty condition. In order to ensure
that communication can be established, the following
requirements must be met.
• Device supply voltage must be higher than 9 VDC
with a maximum of 32 VDC.
• Total current draw of a given segment cannot exceed
the rating shown on the power conditioner and/or
barrier.
• Two 100
Ω
, 1 µF terminators must be connected to
the network—one at each end of the segment.
• Cable length plus spur length must not exceed the
following values:
• The cable shield is to be hard grounded only at one
point close to the DCS. In addition, the cable shield
can be capacitively grounded in multiple places to
improve EMC protection.
• Ensure all devices are on the “live list,” and the
schedule has been downloaded.
• Ensure that the Resource Block, then the Transducer
Block, and lastly the Function Block(s) being used are
in“Auto” mode rather than Out of Service (OOS).
If all of these requirements are met, stable communication
should be established.
number of Spurs
1 device
2 devices
3 devices
4 devices
25–32
—
—
—
—
19–24
100 ft. (30 m)
—
—
—
15–18
200 ft. (60 m)
100 ft. (30 m)
—
—
13–14
300 ft. (90 m)
200 ft. (60 m)
100 ft. (30 m)
—
1–12
400 ft. (120 m) 300 ft. (90 m)
200 ft. (60 m)
100 ft. (30 m)
Pair
Shield
twisted
Size
Length
type
Single
Yes
Yes
AWG 18 (0.8 mm
2
)
6,200 ft. (1,900 m)
A
Multi
Yes
Yes
AWG 22 (0.32 mm
2
)
3,900 ft. (1,200 m)
B
Multi
No
Yes
AWG 26 (0.13 mm
2
)
1,300 ft. (400 m)
C
Multi
Yes
No
AWG 16 (1.25 mm
2
)
650 ft. (200 m)
D
