TripleGauge™
Bayard-Alpert Pirani Capacitance Diaphragm Gauge
With Fieldbus Interface
BCG450-SD
BCG450-SP
Instruction Sheet
tima41e1-b (2011-04)
About this document
This document is a supplement to the standard Instruction
Sheet enclosed with the BCG450 ( [1]). It should be
used together with the standard Instruction Sheet.
The symbol (→ [XY]) refers to documents and files
listed under "Further Information".
Product Identification
In all communications with INFICON, please specify the in-
formation on the product nameplate. For convenient refer-
ence copy that information into the space provided below.
Model:
PN:
SN:
V W
INFICON AG, LI-9496 Balzers
Validity
This document applies to products with the following part
numbers:
BCG450-SD (DeviceNet):
353-557
(DN 25 ISO-KF)
353-558
(DN 40 CF-R)
353-562 (DN 25 ISO-KF, with baffle)
BCG450-SP (Profibus):
353-554
(DN 25 ISO-KF)
353-556
(DN 40 CF-R)
The part number (PN) can be taken from the product name-
plate.
If not indicated otherwise in the legends, the illustrations in
this document correspond to the vacuum connection
DN 25 ISO-KF. They apply to other vacuum connections by
analogy.
We reserve the right to make technical changes without prior
notice.
All dimensions in mm.
Trademarks
DeviceNet™ Open DeviceNet Vendor Association, Inc.
TripleGauge™ INFICON AG, Balzers
Intended Use
The BCG450-SD and BCG450-SP gauges have been de-
signed for vacuum measurement of gases in the pressure
range 5×10
-10
… 1500 mbar.
They must not be used for measuring flammable or combus-
tible gases in mixtures containing oxidants (e.g. atmospheric
oxygen) within the explosion range.
Safety
Symbols Used
DANGER
Information on preventing any kind of physical injury.
Caution
Information on correct handling or use. Disregard can lead
to malfunctions or minor equipment damage.
Personnel Qualifications
Skilled personnel
All work described in this document may only be carried
out by persons who have suitable technical training and
the necessary experience or who have been instructed by
the end-user of the product.
General Safety Instructions
All safety instructions given in [1] and [2] apply to the
sensor types described in this document, too.
Liability and Warranty
INFICON assumes no liability and the warranty becomes null
and void if the end-user or third parties
• disregard the information in this document
• use the product in a non-conforming manner
• make any kind of changes (modifications, alterations etc.)
to the product
• use the product with accessories not listed in the product
documentation.
The end-user assumes the responsibility in conjunction with
the process media used.
Gauge failures due to contamination or wear and tear, as
well as expendable parts (e.g. filament), are not covered by
the warranty.
BCG450-SD
General Information
The BCG450-SD gauge has a fieldbus interface that
conforms to the DeviceNet standard (→ [8]).
Via this interface, the following and further data are
exchanged in the standardized DeviceNet Protocol
(→ [3], [8]):
• Pressure reading
• Pressure unit (mbar, Torr, Pa)
• Degas function
• Status and error messages
Two adjustable switching functions are integrated in the
gauge. With the built-in atmosphere switching function an
atmospheric pressure thresold can be programmed
(→ [2]). The corresponding relay contacts are available at
the sensor cable connector.
The basic sensor and sensor electronics of the BCG450-SD
type are the same as in the standard BCG450 (→ [1], [2]).
Technical Data
General technical data of the sensor and sensor
electronics → [1], [2]
Fieldbus Interface
Fieldbus name DeviceNet
Standard applied
→ [8]
Communication protocol,
data format
→ [3], [8]
Interface, physical CAN bus
DeviceNet Parameters
Data rate (adjustable via
"RATE" switch)
125 kBaud
250 kBaud
500 kBaud (default)
"P" (programmable
125 kBaud, 250 kBaud,
500 kBaud via DeviceNet
(→ [3])
Node address (MAC ID)
(adjustable via "ADDRESS,
MSD, LSD" switches)
0 … 63
dec
(default 63
dec
)
"P" (programmable
0 … 63
dec
via DeviceNet)
(→ [3])
DeviceNet connector Micro-Style, 5-pin, male
Cable Shielded special
DeviceNet cable,
5 conductors
(→ [6], [8])
Cable length, system wiring According to DeviceNet
specifications
(→ [6], [8])
Supply Voltages
Supply voltage at the sensor
connector, Pin 8
+24 VDC (+20 … +28 V)
Power consumption <20 W
DeviceNet operation requires an additional,
separate power supply.
DANGER
The gauge may only be connected to power
supplies, instruments or control devices that
conform to the requirements of a grounded pro-
tective extra-low voltage (SELV). The connection
to the gauge has to be fused.
Supply voltage at the DeviceNet
connector, Pin 2
+24 VDC (+11 … +25 V)
Power consumption <2 W
The gauge is protected from reversed polarity of the supply
voltage.
(52 pages)
(44 pages)
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