Troubleshooting - OJ Electronics OJ Air2 EXT Anleitung

Voltage outputs
OJ Air2 EXT is equipped with two 24-10 V DC outputs.
The voltage outputs are terminals 5 (+) & 8 (+), each of which can be
loaded with max. 10 mA. (Modbus Registers see fig. 6).
GND
All GND terminals (terminal 1, 3, 6, 9, 11, 18, 20 & 22) are interconnected
within the module and have the same electric potential.
LEDs
The front of the OJ Air2 EXT module is equipped with two LEDs. One
"green" LED, which lights when power is supplied to the EXT module, and
one "red" LED, which flashes in the event of an alarm, e.g. lacking Modbus
communication.
TECHNICAL DATA
Supply voltage .......................... 24 V DC via Modbus
Power consumption .................< 100 mA
Electrical signal connection ......Max. 1.5 mm², screw/socket terminals
System Modbus ....................... RS485, 38,4 kBaud, 24 V DC, RJ12 port
Modbus connection .................2 x RJ12 6/6 ports
Modbus protocol ...................... 38.4 kBaud, 1 start bit, 8 data bits,
Digital inputs ............................. 2 x 3.3 kΩ, pull-up
Analogue inputs ........................ 2 x 0-10 V DC, resolution 10 mV
Sensor inputs ........................... 2 x PT1000 thermistors
Digital outputs .......................... 2 x 230 V AC relays (AC1)
Analogue outputs .....................2 x 0-10 V DC, resolution 10 mV
24 V DC outputs ...................... 2 x 24 V DC / 2 x 10 mA
Ambient temp., operation .........0°C /+50°C
Dimensions ............................... 70 x 90 x 58 mm
Modbus cable dimension ........MPFK6S or similar, max. 50 m
Enclosure .................................. IP20, ABS
Weight ...................................... 160 g
COMMUNICATION
Internal Modbus communication
Internal communication between the OJ Air2 system and OJ Air2 EXT is via
Modbus with the following communication protocol: 38.4 kBaud, 1 start
bit, 8 data bits, 1 stop bit and no parity.

TROUBLESHOOTING

Symptom
"Power" LED not lit
No communication between OJ
Air2 Master and OJ Air2 EXT
Lacking or incorrect readings
on sensor inputs
Lacking or incorrect readings
on analogue inputs
2
1 stop bit
Cause
OJ Air2 Master switched off
Poor or no connection
RJ12 connectors on Modbus cable incorrectly
fitted
OJ Air2 EXT wrongly addressed
Poor or no connection
RJ12 connectors on Modbus cable incorrectly
fitted
OJ Air2 EXT has not been configured in OJ Air2
Master
Sensor circuit short-circuited or broken
OJ Air2 EXT sensor inputs have not been config-
ured in OJ Air2 Master
Sensor is connected to the wrong terminals in OJ
Air2 EXT
Defective PT1000 sensor
Defective OJ Air2 EXT
Defective OJ Air2 Master
No 0-10 V DC signal on input
OJ Air2 EXT analogue inputs have not been
configured in OJ Air2 Master
Analogue input signal is connected to the wrong
terminals in OJ Air2 EXT
Defective OJ Air2 EXT
Defective OJ Air2 Master
SERVICE AND MAINTENANCE
No special maintenance is required.
Please contact your supplier if faults arise.
RESTRICTION ON USE AND WARRANTY
The product may only be used if the complete installation complies with
applicable directives.
The product carries a manufacturer's warranty if installed in accordance
with these instructions and applicable regulations.
If the product has been damaged by physical impact, e.g. during transport,
it must be inspected and checked by authorised personnel before being
taken into use and connected to the power supply.
DISPOSAL AND ENVIRONMENTAL PROTECTION
Help protect the environment by disposing of the packaging and redundant
products in a responsible manner.
Product disposal
Products marked with this symbol must not be disposed of along
with household refuse but must be delivered to a waste collection
centre in accordance with current local regulations.
OJ ELECTRONICS A/S
Stenager 13B • DK-6400 Sønderborg
Tél. : +45 73 12 13 14 • Fax +45 73 12 13 13
oj@ojelectronics.com • www.ojelectronics.com
CE MARKING
OJ Electronics A/S hereby declares under sole responsibility that the prod-
uct complies with the following standards:
EN 61000-6-2:2001 and EN 61000-6-3:2001 Electromagnetic compatibility
(EMC)
Incorporation in machines
The product is designed to be incorporated in machinery or to be com-
bined with other machine components for incorporation in machinery
covered by Directive 98/37/EEC of the European Parliament and of the
Council (and subsequent amendments). The product itself therefore does
not comply with the requirements of this directive in all respects.
Action
Switch on OJ Air2 Master
Check cable and connectors for poor connections
Check and if necessary adjust connectors (see fig. 5)
Set the correct Modbus address by turning the switch on the front of OJ Air2
EXT
Check cable and connectors for poor connections
Check and if necessary adjust connectors (see fig. 5)
Configure OJ Air2 EXT via the Web server in OJ Air2 Master
Check sensor and electrical connections in sensor circuit
The sensor must be a PT1000 thermistor with a resistance of 1000 Ω @ 0°C
Configure OJ Air2 EXT sensor inputs via the Web server in OJ Air2 Master
Check sensor connections: Tin 1 sensor should be connected to terminals 11
and 12. Tin 2 sensor should be connected to terminals 21 and 22.
Replace PT1000 sensor
Replace OJ Air2 EXT
Replace OJ Air2 Master
Check 0-10 V DC signal
Configure OJ Air2 EXT analogue inputs via the Web server in OJ Air2
Master
Check electrical connections: Analogue input Ain 1 should be connected to
terminals 9 (earth/GND) and 10(+). Analogue input Ain 2 should be connected
to terminals 6 (earth/GND) and 7(+).
Replace OJ Air2 EXT
Replace OJ Air2 Master
© 2018 OJ Electronics A/S