F
Operating instructions
cod. 1592001330
1592001330 XC642C GB r1.0 07.06.2004.doc
rel. 1.0
Pa. 16 / 21
Before connecting cables make sure the power supply complies with the instrument’s requirements.
Separate the input connection cables from the power supply cables, from the outputs and the power
connections.
Do not exceed the maximum current allowed on each relay
, in case of heavier loads use a
suitable external relay.
17.1 PROBES CONNECTION
Pressure probe (4 - 20 mA)
: respect the polarity. If using terminal ends be sure there are no bear parts
which could cause short circuiting or introduce noise disturbance at high frequencies. To minimise the
induced disturbances use shielded cables with the shield connected to earth.
Temperature probe:
it is recommended to place the temperature probe away from direct air streams to
correctly measure the temperature.
18. RS485 serial link
All models can be integrated into the monitoring and alarm system XJ500 using the TTL serial port. They use
the standard ModBus RTU protocol, so they can be fitted in a system integrator using this protocol.
19. Technical features
Housing:
Self extinguishing ABS.
Case:
Front panel 32x74 mm, depth 60mm (“C” format);
Mounting :
“C” format panel mounting in a 29x71 mm panel cut-out
Protection:
IP65.
Frontal protection:
IP65 with frontal gasket mod RG-C model.
Connections:
Removable terminal block 12 and 14 ways;
Power supply:
12Vac/dc
±
10%, 24Vac/dc
±
10%, 50-60Hz.
Power absorption:
5VA max.
Display:
3 digits red led and 4 digit orange led.
Inputs:
2 NTC probes, or 2 PTC probes and 2 4..20mA transducer.
Digital inputs
: 5 free voltage
Relay outputs:
5 relay SPST 5(3)A, 250Vac
Open collector:
alarm output: 12V, 40mA.
Analogue output:
4..20mA for fan control, trigger for fan control
Serial output :
TTL standard
Communication protocol:
ModBus – RTU
Data storing:
on the non-volatile memory (EEPROM).
Kind of action:
1B;
Pollution grade:
normal;
Software class:
A.
Operating temperature:
0÷60 °C.;
Storage temperature:
-25÷60 °C.
Relative humidity:
20
÷
85% (no condensing)
Measuring range: NTC probe:
-40÷110°C.
Resolution:
0,1 °C or 1°C;
Accuracy (ambient temp. 25°C)
: ±0,7 °C ±1 digit
20. Alarms list
Usually alarm conditions are signalled by means of:
1.
Activation of alarm output 0-12V
2.
Message on proper display
3.
Log of alarm: code and duration.
20.1 TYPES OF ALARMS AND SIGNALLING MANAGED
20.1.1
A12: Configuration alarm
The following configuration parameters are checked after each modification.:
OA1
÷
÷
÷
÷
OA4
Outputs 1- 4 configuration
P2P
Second probe presence.
dSEP
Dynamic set point enabling
AOP
Probe for analog output
tOP
Probe for triac output
When these parameters are set in wrong way an alarm message is generated:
