INFICON HPG400-SP High Pressure / Pirani Gauge - Manual (Page 3)

HPG400-SP Profibus
General Information
The HPG400-SP gauge has a fieldbus interface
that conforms to the Profibus DPV1 standard
(
→ [9]).
Via this interface, the following and further data
are exchanged in the standardized Profibus pro-
tocol (
→ [1], [2]):
• Pressure reading
• Pressure unit (mbar, Torr, Pa)
• Gauge adjustment
• Status and error messages
Two adjustable switching functions are integrated in the
gauge. The corresponding relay contacts are available at the
sensor cable connector.
The basic sensor and sensor electronics of the HPG400-SP
type are the same as in the standard HPG400 (
→ [1], [2]).
Technical Data HPG400-SP
General technical data of the sensor and sensor
electronics
→ [1], [2].
Fieldbus Interface
Fieldbus name Profibus
Standard applied → [9]
(Profibus DPV1)
Communication protocol,
data format
→ [4], [9]
Interface, physical RS485
HPG400-SP Profibus parameters
Data rate ≤12 Mbaud
(
→ [4], [9])
Node address
(adjustable via hexadecimal
"ADDRESS, MSD, LSD"
switches or programmable via
Profibus,
→ [2], [4]) 00 … 7D
hex
(0 … 125
dec
)
Profibus connection D-Sub, 9 pins, female
Cable Shielded special
Profibus cable
(
→ [7], [9])
Cable length, system wiring According to Profibus
specifications (
→ [7],
[9])
Supply Voltages
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-E according to
EN 61010). The connection to the gauge has to
be fused.
The power consumption of the HPG400-SP is higher
than that of the standard HPG400.
Supply voltage at sensor cable
connector, Pin 8
+24 VDC (+20 … 28 V)
Power consumption <18 W
Sensor Cable Connection
For reasons of compatibility, the expression "sensor
cable" is used in this document, although the pres-
sure reading of the SP-type gauge is normally trans-
mitted via the Profibus interface.
Connector D-Sub, 15 pins, male
Cable Max. 15 conductors,
shielded
Cable length
(cross section/conductor) ≤35 m (0.25 mm 2 )
≤50 m (0.34 mm 2 )
≤100 m (1.0 mm 2 )
Switching functions 2
Setpoints adjustable via
potentiometers (Setpoints
A and B), one floating,
normally open contact per
setpoint
Relay contact rating ≤60 VDC, ≤0.5 A
Gauge identification 56 k Ω between Pin 10
(sensor cable) and GND
Grounding principle → "Electrical Connection"
Dimensions
Housing and vacuum connection → [1], [2]
Weight
353-525
353-526 430 g
695 g
Electrical Connection
Make sure the vacuum connection is properly made
(
→ [1], [2], " Vacuum Connection ").
n
If no sensor cable is available, make one according to
the diagram.
Threshold SP A
Threshold SP B
SP A
SP B
TxD
RxD
+U
b
Measuring signal
56 kΩ
3
6
1
4
9
11
13
14
8
2
12
10
5
15
1.25 AT
24V
Identification
0V
RS232
1 8
9 15
D-Sub, 15 pins, female
soldering side
Pin 1 Relay switching function A, COM contact
Pin 2 Signal output (measuring signal) 0 … +10 V
Pin 3 Threshold (Setpoint) A 0 … +10 V
Pin 4 Relay switching function A, N.O. contact
Pin 5 Supply common, GND
Pin 6 Threshold (Setpoint) B 0 … +10 V
Pin 7 Not connected
Pin 8 Supply voltage +24 V
Pin 9 Relay switching function B, COM contact
Pin 10 Gauge identification
Pin 11 Relay switching function B, N.O. contact
Pin 12 Signal common, GND
Pin 13 RS232 TxD
Pin 14 RS232 RxD
Pin 15 Shielding, housing, GND
o
If no Profibus cable is available, make one according to
the following indications:
1 5
6 9
D-Sub, 9 pins, male
soldering side
Pin 1 Not connected
Pin 2 Not connected
Pin 3 RxD/TxD-P
Pin 4 CNTR-P 1)
Pin 5 DGND 2)
Pin 6 VP 2)
Pin 7 Not connected
Pin 8 RxD/TxD-N
Pin 9 Not connected
1) Only to be connected if an optical link module is
used.
2) Only required as line termination for devices at both
ends of bus cable (
→ [9]).
p
Connect the sensor cable to the gauge.
q
Connect the Profibus cable to the gauge.
Sensor cable
Profibus cable
r
Secure the sensor cable connector on the gauge using
the lock screws.
s
Lock the Profibus cable connector.
The gauge can now be put into operation.
Operation
Caution
Caution: data transmission errors
If the gauge is operated via an RS232 interface
(e.g. INFICON Vacuum Gauge Controller
VGC4XX) and the Profibus at the same time,
data transmission errors may occur.
The gauge must not be operated via an RS232
interface and the Profibus at the same time.
Operating Software
For operating the gauge via the Profibus network, prior in-
stallation of the gauge specific GSD file is required. This
software can be downloaded via internet (
→ [5]).
Note Address Setting
The node address (0 … 125
dec
) is set in
hexadecimal form (00 … 7D
hex
) via the
"ADDRESS", "MSD", and "LSD" switches.
The node address is polled by the firmware
when the gauge is switched on. If the
setting deviates from the stored value, the
new value is taken over into the NVRAM. If
a value >7D
hex
(>125
dec
) is entered, the
node address setting currently stored in the
device remains valid but it can now be
defined via Profibus ("Set slave Address",
→ [4]).
Adjusting the Gauge
→ "Adjustment and settings".
Setting the Switching Functions
→ "Adjustment and settings".
The gauge is now ready for operation.