Super Systems 7EK 31082 User Manual

Instruction Manual

P/N 31082

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7 EK (1/8 DIN)
Controller
With Servo output.

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II

INDEX

OUTLINE AND CUT OUT DIMENSIONS ....................... IV

REAR TERMINAL BLOCK .............................................. VI

MOUNTING REQUIREMENTS ........................................ 1

CONNECTION ................................................................. 1

PRELIMINARY HARDWARE SETTINGS ........................ 6

INSTRUMENT CONFIGURATION ................................... 7

OPERATIVE MODE ....................................................... 16

OPERATIVE PARAMETERS ......................................... 20

ERROR MESSAGES ..................................................... 23

GENERAL INFORMATIONS .......................................... 25

MAINTENANCE ............................................................. 25

DEFAULT PARAMETERS ............................................ A.1

CODING ........................................................................ A.3

SECURITY CODES ....................................................... A.3

GB

Display functions .................................................... 16

Indicators ............................................................... 16

Pushbutton function during

operating mode ...................................................... 17

Feedback potentiometer limits setting ................... 17

Enable/disable the control output .......................... 18

Direct access to the set point ................................ 18

Manual function ...................................................... 18

Loop break alarm ................................................... 19

SMART function ..................................................... 19

Lamp test ............................................................... 19

Operative set point selection ................................. 20

Serial link ................................................................ 20

III

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OUTLINE AND CUT OUT DIMENSIONS

Fig. A 31082 Servo

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IV

CONNECTION DIAGRAMS

Connections are to be made with the instrument housing
installed in its proper location.

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Fig. B 31082 Servo

V

MOUNTING REQUIREMENTS

This instrument is intended for permanent installation, for
indoor use only, in an electrical panel which encloses the
rear housing, exposed terminals and wiring on the back.
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.
For outline and cutout dimensions refer to page IV.
The surface texture of the panel must be better than
6,3 mm.
The instrument is shipped with rubber panel gasket.
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

bracket

gasket

bracket

screw

panel

CONNECTIONS
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

1

+

_

3

Shield

1

+

_

3

Shield

Fig. 2 THERMOCOUPLE INPUT WIRING
External resistance: 100 W max, maximum error 0,1% of
span.

Cold junction: automatic compensation from 0 to 50 °C.
Cold junction accuracy : 0.1 °C/°C
Input impedance: > 1 MW
Calibration : according to IEC 584-1 and DIN 43710 -

1977.

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.

Fig. 1

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1

RTD INPUT

RTD

RTD

LINEAR INPUT

1

3

+

_

Shield

mA,

mV

or

V

4

Fig. 3 RTD INPUT WIRING

Input circuit: current injection (135 mA).
Line resistance: automatic compensation up to 20 W/wire

with no measurable error.

Calibration: according to DIN 43760

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.

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13 4

13

GB

1

3

Fig. 4 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.

Input type

0 - 60 mV

13

12 - 60 mV

14

0 - 20 mA

15

4 - 20 mA

16

0 - 5 V

17

1 - 5 V

18

0 - 10 V

19

2 - 10 V

20

2

impedance

> 1 MW

< 5 W

> 200 kW

> 400 kW

Accuracy

0.2 % + 1 digit
@ 25°C

+

mA
mV

_

or

V

G

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. A duble or reinforced isolation between logic
inputs and power supply must be assured by the
external elements.

Log. input 3

8

Log. input 2

7

Log. input 1

6

C) VALVE MOTOR DRIVE OUTPUT.

s (Open the valve)

17

18

19

Power

line

t (Close the valve)

20

21

22

Servo-

motor

Shield

Feedback

potentiometer

5

Fig. 5 - 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.

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Fig. 6 - SERVOMOTOR WIRING

The two relay outputs are interlocked.

Potentiometer type: from 100 W to 10 kW.
Minimum working stroke: 50 % of the potentiometer

rang in order tu assure the 1% display resolution.

NOTES:

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.

3

D) RELAY OUTPUTS

OUT 3

OUT 4

OUT 1

14

15

16

17

18

NO - OUT 3

C - OUT 3/4

NO - OUT 4

NO

C

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. 8.

C

R

LOAD

POWER

LINE

Fig. 7 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 105 at 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.

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Fig. 8 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.

LOAD

(mA)

<40 mA
<150 mA
<0.5 A

Anyway the cable involved in relay output wiring must be
as far away as possible from input or communication
cables.

4

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

SERIAL INTERFACE

RS-485 interface allows to connect up to 30 devices with
one remote master unit.

I

11

10

A/A'

B/B'

9

COMMON

N
S
T
R
U
M
E
N

A'/A

B'/B

M
A
S

T
E
R

T

Fig. 9 - RS-485 WIRING

The cable length must not exceed 1.5 km at 9600 BAUD.
It is an isolated RS-485 interface.
Interface type: isolated RS-485
Protocol types: MODBUS, JBUS, ERO polling/selecting.
Baud rate: programmable from 600 to 19200 BAUD.
Byte format: 7 or 8 bit programmable.
Parity: even, odd or none programmable.
Stop bit: one.
Address:

- from 1 to 95 for ERO protocol

- from 1 to 255 for all the other protocols
Output voltage levels: according to EIA standard.

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).

E) POWER LINE WIRING

N (L2)

13

12

L (L1)

Fig. 10 POWER LINE WIRING

100V to 240V AC 50/60Hz (-15% to + 10% of the nominal
value).
24 V AC/DC (+ 10 % of the nominal value).

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 Connected
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.
NOTE: a single switch or circuit-breaker can drive more
than one instrument.

9) When a neutral line is present, connect it to terminal

13.

L (L1)

N (L2)

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5

PRELIMINARY HARDWARE SETTINGS

How to remove the instrument from its case

1) Switch off the instrument.

2) Push gently the lock A on the right.

A

3) While the lock A is maintained out, slide out the right
side of the instrument.

A

4) Push gently the lock B on the left.

5) While the lock B is maintained out, slide out the
instrument.

INPUT SELECTION

1) Remove the instrument from its case.

2) It is necessary to set J1 according to the desired input type
as shown in the following figure.

INPUT J1

TYPE 1-2 3-4 5-6 7-8 9-10

TC-RTD open close open open open

60 mV open close open open open

5 V close open close open open

10 V open open close open open

20 mA open open open close close

NOTE : the not used jumper can be positioned on pin 7-9

B

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J1

6

2 4 6 8 10

1 3 5 7 9

Fig. 11