OJ Electronics PTH-6201 Instructions page 5

HOLDING:
Addr-0 (REG-1)
ExternCalibrate
Kalibrerings Status (1 = NulKalibrering)
INPUT:
Addr-0 (REG-1) SoftwareVer
Addr-1 (REG-2) Pressure
Addr-4 (REG-5) PressHiRes
Addr-5 (REG-6) PressAvrDyn Dynamisk mid-
Addr-6 (REG-7) PressAvrAbs Dynamisk
SERVICE OG VEDLIGEHOLD
PTH-6201/6202/6502 indeholder ingen kompo-
nenter der kræver service eller vedligehold.
Kontakt venligst leverandøren til tilfælde af
problemer.
MILJØ OG BORTSKAFFELSE
Hjælp med at beskytte miljøet, ved at bortskaffe
emballage og brugte produkter, på en miljørigtig
måde.
Bortskaffelse af produktet
Produkter med dette mærke, må ikke
bortskaffes som almindeligt hushold-
ningsaffald, men skal indsamles
særskilt i henhold til de gældende
lokale regler.
OJ Electronics A/S
Stenager 13B • DK-6400 Sønderborg
Tel. +45 73 12 13 14 • Fax +45 73 12 13 13
oj@ojelectronics.com • www.ojelectronics.com
CE MÆRKNING
OJ Electronics A/S erklærer under ansvar, at
dette produkt opfylder Rådets Direktiv 92/31 og
efterfølgende ændringer om elektromagnetisk
kompatibilitet samt Rådets Direktiv 73/23 og
efterfølgende ændringer om elektrisk materiel
bestemt til anvendelse indenfor visse spæn-
dingsgrænser.
Benyttede standarder
EMC-emission EN 61000-6-3:2001
EMC-immunitet EN 61000-6-2:2001
English
LIST OF FIGURES
The following figures are located at the back of
the instructions:
Fig. 1: Dimensioned drawing
Fig. 2: Position of transmitter in relation to
bends and branches
Fig. 3: Wiring diagram, PTH-6202/6502
Fig. 4: Modbus connections
Fig. 5: Example of configuration
Fig. 6: Wiring diagram, PTH-6201
INTRODUCTION
PTH-6201/6202/6502 is an electronic pressure
transmitter which communicates via RS485
RTU Modbus and is primarily used to measure
differential pressure in a ventilation system.
The pressure transmitter is used in association
with monitoring, control and regulation via an
electronic regulator, i.e. in PLC, BMS or SCADA
systems. All commands and data exchanged
between the PTH-6201/6202/6502 and the
regulator unit are sent as digital values via the
RS485 RTU Modbus protocol. The integrated
Modbus communication makes the PTH-
6201/6202/6502 highly suitable for integration
into PLC, BMS and SCADA systems, due to
reduced installation costs.
Typical areas of application include:
- Measurement of pressure at a given point in a
ventilation system.
- Measurement of differential pressure across
Software a ventilation filter for optimum filter replace-
Version 1/100 ment.
Sensor tryk i Pa - Measurement of differential pressure across a
Sensor tryk i fan for the regulation of duct pressure
0,1 Pa
PRODUCT PROGRAMME
ling af Type
PressHiRes PTH-6201 RS485 RTU Modbus, IP54, 1,5 mm
PTH-6202 RS485 RTU Modbus, IP54, RJ12,
midling af 30
sidste målinger PTH-6502 RS485 RTU Modbus, IP54, RJ12,
på PressHiRes
FUNCTION
PTH-6201/6202/6502 is a pressure transmit-
ter for comfort or process ventilation. The unit
communicates via the RS485-Modbus with
a connected regulator unit (see fig. 5), and
displays, via Modbus communication, a value
dependent on the set measurement range in
the connected regulator unit which is propor-
tional to the measured pressure. PTH uses a
semiconductor pressure measurement unit with
no air through flow, which protects the unit from
dust from the ventilation system. The pressure
element is temperature compensated to provide
accurate pressure measurement throughout
the specified temperature range (see 'Technical
Data').
INSTALLATION
The enclosure is opened without the use of
tools by pressing the snap lock at the side of
the tube connectors.
PTH-6201/6202/6502 is attached onto a level
surface by 2 screws, which are screwed into
a solid underlay. PTH-6201/6202/6502 can be
fitted in all directions without accuracy being
affected. PTH-6201/6202/6502 also functions
with only one tube fitted to the connectors
(+ or -). However, two tubes should always be
fitted to ensure a suitable enclosure rating, if the
connectors do not face downwards.
Pressure is supplied to the measurement unit
by tubes, the highest pressure being connected
to the '+ connector' and the lowest pressure to
'÷ connector' (see fig. 3).
The pressure tubes must be as short as pos-
sible and must be secured in position to prevent
vibration.
To obtain the best possible results, pressure
must be measured where there is least risk of
turbulence, i.e. in the centre of the ventilation
duct and at a distance of at least twice the
width of the duct from bends and six times the
width from branches (see fig. 2).
If there is a risk of condensation forming in
connection tubes, PTH-6201/6202/6502 is to be
located in such a way that condensated fluids
cannot flow back into the pressure transmitter.
The enclosure is equipped with screw holes
(see fig. 1).
Modbus cable installation
The enclosure is opened without the use of
tools by pressing the snap lock beside the tube
connectors.
PTH-6201: Modbus is connected to PTH-6201
via the four terminals. PTH-6201 is equipped
with four screw terminals for Modbus connec-
tion and loops to other Modbus components
in the application concerned. PTH-6201 must
be provided with a 24 V DC power supply con-
nected to screw terminals 1(+) and 4 (GND),
see fig. 6.
PTH-6202/6502: Connect the Modbus cable
to PTH-6202/6502 using the RJ12 socket.
PTH-6202/6502 is equipped with two Modbus
RJ12 sockets, allowing Modbus connection
and loops to other Modbus components in the
Product
2500 Pa
5000 Pa
© 2013 OJ Electronics A/S
application concerned. The supply voltage for
PTH-6202/6502 is 24 V DC and PTH-6202/6502
is supplied with electrical power through the
RJ12 socket (see fig. 4).
A rubber membrane is fitted to both the lid and
the bottom edge of the enclosure so that the
Modbus cable (flat transmission cable, such
as cable type MPFK6S or equivalent) can be
led into the enclosure through the lid opening.
When the lid is fitted, the rubber diaphragm is
pressed sufficiently tightly around the Modbus
cable to make the enclosure comply with IP54.
TECHNICAL DATA
2
Supply voltage ............ 24 V DC ±15% via Modbus
Electrical connections, PTH-6201
............... ......4 x screw terminals, max. 1.5 mm²
Electrical connections, PTH-6202/6502
...........................................2 x RJ12 6/6 sockets
Modbus protocol
...........................................8 data bits, 1 stop bit
Measurement ranges, pressure
PTH-6201/6202 .................................. 0/2500 Pa
Measurement ranges, pressure
PTH-6502 ........................................... 0/5000 Pa
Max. height above sea level ...................1300 m
Accuracy output signal, PTH-6201/6202
..............................................0,5 %xMV + 2,5 Pa
Accuracy output signal, PTH-6502
..............................................0,5 %xMV + 5,0 Pa
Maximum pressure ...................................20 kPa
Ambient air humidity ....................... 10-95 %RH,
Enclosure dimensions ..............75 x 36 x 91 mm
Cable dimension ....................MPFK6S or similar
Pressure tubes .......................................2 x ø 6,2
Environment data
Power consumption ............... 0,5 VA (-20/+40 °C)
Ambient temperature ........ -20/+40°C (operation)
........................................(transient -30 to +50°C)
Ambient temperature, storage -50/+70° to +70°C
Enclosure rating ............................................IP54
Weight ........................................................ 110 g
OPERATION
Status light in normal operation:
"Power ON" (green LED) lights up to indicate
that voltage is received from the Modbus cable.
Valid communication on Modbus is similarly
indicated by a 'Modbus Communications' (yel-
low LED) which flashes, the intensity of flashing
being dependent on communication intensity.
LED ON FLASHING
Valid Modbus
Top
communica-
(yellow)
tion
Bottom POWER
(green) ON
Modbus protocol
PTH-6201/6202/6502 has an address range of
16 and can be set to addresses between 0x50
(hex) (dec 80) and 0X5F (hex) (dec.95). The
communication protocol is: 38.4 kB, 1 start bit,
8 data bits, 1 stop bit and no parity.
The address can be set on the address switch
inside the PTH-6201/6202/6502.
Modbus addresses
HexEncoder: ID
0- 0x59(89 dec)
1- 0X56(86 dec)
2- 0X50(80 dec)
3- 0X51(81 dec)
4- 0X57(87 dec)
5- 0X52(82 dec)
6- 0X58(88 dec)
7- 0X55(85 dec)
8- 0X53(83 dec)
9- 0X54(84 dec)
10- 0X5A(90 dec)
11- 0X5B(91 dec)
38.4 kBaud, 1 start bit,
(MV = measured value)
non-condensing
OFF
Invalid Modbus
communication
Power OFF
5