Chromalox 8004-2 Manuale utente
8004-2
Temperature Controller with Servomotor Output
Issue date rUSER'S MANUAL
May 2000
Chromalox
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INDEX
MOUNTING REQUIREMENTS .......................... 1
OUTLINE AND CUT OUT DIMENSIONS ........... 2
CONNECTION DIAGRAMS ................................ 3
PRELIMINARY HARDWARE SETTINGS ........... 9
CONFIGURATION PROCEDURE .................... 10
OPERATIVE MODE .......................................... 18
Display function ......................................... 18
Indicators ................................................... 19
Pushbutton function during operating mode
19
Feedback potentiometer calibration .......... 20
Enable/disable the control output .............. 20
Manual function ......................................... 21
Direct access to the set point .................... 21
operative set point selection ...................... 22
Serial link ................................................... 22
SMART function ........................................ 22
Lamp test ................................................... 23
OPERATIVE PARAMETERS ............................ 23
ERROR MESSAGES ........................................ 26
GENERAL INFORMATIONS ............................ 29
MAINTENANCE ................................................ 33
DEFAULT PARAMETERS ............................... A.1
GB
II
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Model identification
Model
8004 1/16 DIN Temperature Controller
Code Outputs
21 1 servomotor + 1 relay + 3 logic inputs
Code Output 2 - Alarm
0 None
1 Out #4
2 Out #4 + RS-485
Code Instrument Power
3 100 - 240 Vac
5 24 V AC/DC
Code
000 Add to complete model number
8004 21 1 3 000 Typical Model Number
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MOUNTING REQUIREMENTS
Select a mounting location where there is
minimum vibration and the ambient temperature
range between 0 and 50 °C.
The instrument can be mounted on a panel up to
15 mm thick with a square cutout of 45 x 92 mm.
For outline and cutout dimensions refer to Fig. 2.
The surface texture of the panel must be better
than 6,3 mm.
The instrument is shipped with rubber panel
gasket (50 to 60 Sh).
To assure the IP65 and NEMA 4 protection, insert
the panel gasket between the instrument and the
panel as shown in fig. 1.
While holding the instrument against the panel
proceed as follows:
1) insert the gasket in the instrument case;
2) insert the instrument in the panel cutout;
3) pushing the instrument against the panel,
insert the mounting bracket;
4) with a screwdriver, turn the screws with a
torque between 0.3 and 0.4 Nm.
Screw
Screw
Fig. 1
bracket Panel
Gasket
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OUTLINE AND CUT OUT
DIMENSIONS
Fig. 2
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CONNECTION DIAGRAMS
Connections are to be made with the instrument
housing installed in its proper location.
Fig. 3 REAR TERMINAL BLOCK
A) MEASURING INPUT
NOTE: Any external components (like zener
barriers etc.) connected between sensor and
input terminals may cause errors in measurement
due to excessive and/or not balanced line
resistance or possible leakage currents.
TC INPUT
Fig. 4 THERMOCOUPLE INPUT WIRING
NOTE:
1) Don’t run input wires together with power
cables.
2) For TC wiring use proper compensating cable
preferable shielded.
3) when a shielded cable is used, it should be
connected at one point only.
Shield
Shield
1
3
+
_
1
3
+
_
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RTD INPUT
Fig. 5 RTD INPUT WIRING
NOTE:
1) Don’t run input wires together with power
cables.
2) Pay attention to the line resistance; a high line
resistance may cause measurement errors.
3) When shielded cable is used, it should be
grounded at one side only to avoid ground loop
currents.
4) The resistance of the 3 wires must be the
same.
LINEAR INPUT
Fig. 6 mA, mV AND V INPUTS WIRING
NOTE:
1) Don’t run input wires together with power
cables.
2) Pay attention to the line resistance; a high line
resistance may cause measurement errors.
3) When shielded cable is used, it should be
grounded at one side only to avoid ground loop
currents.
4) The input impedance is equal to:
< 5 Wfor 20 mA input
> 1 MWfor 60 mV input
> 200 kWfor 5 V input
> 400 kWfor 10 V input
4
RTD
1
3 4
RTD
1
3
Shield
_
+mA,
mV
or
V
3
+
_
G
mA
mV
or
V
1
3
1
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B) LOGIC INPUT
Safety note:
1) Do not run logic input wiring together with
power cables.
2) Use an external dry contact capable of
switching 0.5 mA, 5 V DC.
3) The instrument needs 100 ms to recognize a
contact status variation.
4) The logic inputs are NOT isolated by the
measuring input
Fig. 7 - LOGIC INPUT WIRING
This instrument is provided with 3 logic inputs.
The binary combination of the logic input 1 and 3
allows to select the operative set point according
with the following table:
logic input 3 logic input 1 op. set point
open open SP
open close SP2
close open SP3
close close SP4
The logic input 2 function is programmed by P 24
parameter.
8
Log. input 3
7
Log. input 2
6
5
Log. input 1
17
18
19
Servo-
motor
Power
line
20
21
22
s(Open the valve)
t(Close the valve)
Feedback
potentiometer
Shield
C) VALVE MOTOR DRIVE OUTPUT.
Fig. 8 - SERVOMOTOR WIRING
The two relay outputs are interlocked.
NOTE:
1) Before connecting the instrument to the power
line, make sure that line voltage and the load
current are in accordance with the contact rating
(3A/250V AC on resistive load).
2) To avoid electric shock, connect power line at
the end of the wiring procedure.
3) For servomotor connections use No 16 AWG or
larger wires rated for at last 75 °C.
4) Use copper conductors only.
5) Don’t run input wires together with power cables.
6) For feedback potentiometer, use shielded cable
with the shield connected to the earth at one point
only.
7) The relay outputs are protected by varistor
against inductive load with inductive
component up to 0.5 A.
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D) RELAY OUTPUTS
Fig. 9 RELAY OUTPUTS WIRING
NOTE: OUT 1 can be used either as servomotor
output or as time proportional relay output;
by the P5 parameter (see pag.11) it is
possible to set the desired output.
All relay outputs are protected by varistor against
inductive load with inductive component up to 0.5 A.
The contact rating of OUT 1 is 3A/250V AC on
resistive load, the contact rating of OUT 3 and 4
is 2A/250V AC on resistive load.
The contact rating of the OUT 3 and 4 is 2A/250V AC
resistive load.
The number of operations is 1 x 105at specified
rating.
Alarm 2 and alarm 3 are in OR condition on the
out 4.
The following recommendations avoid serious
problems which may occur, when using relay
output for driving inductive loads.
INDUCTIVE LOADS
High voltage transients may occur when switching
inductive loads.
Through the internal contacts these transients
may introduce disturbances which can affect the
performance of the instrument.
The internal protection (varistor) assures a correct
protection up to 0.5 A of inductive component.
The same problem may occur when a switch is
used in series with the internal contacts as shown
in Fig. 10.
Fig. 10 EXTERNAL SWITCH IN SERIES WITH
THE INTERNAL CONTACT
In this case it is recommended to install an
additional RC network across the external contact
as shown in Fig. 10
The value of capacitor (C) and resistor (R) are
shown in the following table.
Anyway the cable involved in relay output wiring
must be as far away as possible from input or
communication cables.
16
14
15 C - OUT 3/4
NO - OUT 3
NO - OUT 4
OUT 3
OUT 4
LOAD
(mA)
<40 mA
<150 mA
<0.5 A
C
(mF)
0.047
0.1
0.33
R
(W)
100
22
47
P.
(W)
1/2
2
2
OPERATING
VOLTAGE
260 V AC
260 V AC
260 V AC
17
18 C
NO
OUT 1
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SERIAL INTERFACE
RS-485 interface allows to connect up to 30
devices with one remote master unit.
Fig. 11 - RS-485 WIRING
The cable length must not exceed 1.5 km at 9600
BAUD.
NOTE: The following report describes the signal
sense of the voltage appearing across the
interconnection cable as defined by EIA for
RS-485.
a) The ” A ” terminal of the generator shall
be negative with respect to the ” B ” terminal
for a binary 1 (MARK or OFF) state.
b) The ” A ” terminal of the generator shall
be positive with respect to the ” B ” terminal
for a binary 0 (SPACE or ON)
10
9COMMON
11
B'/B
B/B'
A/A' A'/A
M
A
S
T
E
R
I
N
S
T
R
U
M
E
N
T
R (S,T)
R (S,T)
N
N
POWER LINE 100 V to 240 V A.C
(50/60Hz)
or 24 V AC/DC
E) POWER LINE WIRING
Fig. 12 POWER LINE WIRING
NOTE:
1) Before connecting the instrument to the power
line, make sure that line voltage corresponds to
the descrtiption on the identification label.
2) To avoid electric shock, connect power line at
the end of the wiring procedure.
3) For supply connections use No 16 AWG or larger
wires rated for at last 75 °C.
4) Use copper conductors only.
5) Don't run input wires together with power cables.
6) For 24 V DC the polarity is a do not care condition.
7) The power supply input is fuse protected by a sub
miniature fuse rated T, 1A, 250 V.
When fuse is damaged, it is advisable to verify
the power supply circuit, so that it is necessary to
send back the instrument to your supplier.
8) The safety requirements for Permanently Con-
nected Equipment say:
- a switch or circuit-breaker shall be included in
the building installation;
- It shall be in close proximity to the equipment
and within easy reach of the operator;
- it shall be marked as the disconnecting device
for the equipment.
12
13
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