Super Systems 7EK 31081 User Manual

Instruction Manual

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31081 (1/8 DIN)
Controller
With mA output.

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INDEX

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

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

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

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

PRELIMINARY HARDWARE SETTINGS ........................ 7

INSTRUMENT CONFIGURATION................................... 9

OPERATIVE MODE ....................................................... 18

OPERATIVE PARAMETERS ......................................... 21

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

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

MAINTENANCE ............................................................. 2 5

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

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

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

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GB

Display function...................................................... 18

Set points ............................................................... 1 8

Indicators ............................................................... 1 8

Pushbutton function during

operating mode ...................................................... 19

Enable/disable the control output .......................... 19

Manual function...................................................... 19

Direct access to the set point ................................ 20

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

SMART function ..................................................... 20

lamp test ................................................................ 2 0

Loop break alarm function ..................................... 21

OUTLINE AND CUT OUT DIMENSIONS

Fig. A1 31081

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IV

REAR TERMINAL BLOCK

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

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Fig. B 31081

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.

CONNECTIONS
A) MEASURING INPUTS
NOTE: Any external components (like zener barriers ecc.)

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

screw

bracket

gasket

screw

bracket

Fig. 1

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panel

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.

1

RTD INPUT

RTD

RTD

LINEAR INPUT

1

3

+

_

Shield

mA,

mV

or

V

4

3 4

1

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
NOTES:

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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3

1

1

3

Fig. 4 mA, mV AND V INPUTS WIRING
NOTES:

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

TX INPUT

IN +

1

IN -

3

AUX +

5

AUX -

6

IN +

1

IN -

3

AUX +

5

AUX -

6

IN +

1

IN -

3

AUX +

5

AUX -

6

Fig. 5 TX INPUT WIRING
NOTES:

1) Don’t run input wires together with power cables.

2) When shielded cable is used, it should be grounded at
one side only and possibly to the terminal 6 of the
instrument.

3) The impedance of the 20 mA input, is less than 5 W.

4) The auxiliary power supply (AUX) is rated:
24 V DC (+ 10%), 25 mA maximum.

5) The auxiliary power supply (AUX) is NOT isolated from
measuring input. A duble or reinforced isolation
between instrument input and power line must be
assured by the external transmitter.

OUT

+

OUT

-

PWR

+

PWR

-

OUT

+

PWR

+

GND

OUT

-

OUT

+

4-wire

3-wire

2-wire

B) LOGIC INPUT

Safety note:

1) Do not run logic input wiring together with power
cables.

2) Use an external dry contact capable to switch 0.5 mA,
5 V DC.

3) The instrument needs 100 ms to recognize a contact

transmitter

status variation.

4) The logic inputs are NOT isolated by the measuring
input. A double or reinforced isolation between logic
inputs and power line must be assured by the external
elements.

Log. input 2

8

Log. input 1

transmitter

7

6

Fig. 6 - LOGIC INPUT WIRING
This instrument is provided with 4 set points (SP, SP2,

SP3 and SP4).

transmitter

The set point selection is possible only by logic inputs 1
and 2 (terminals 6, 7 and 8).

Logic input 1 Logic input 2 Op. Set point

open (6 - 7) open (6 - 8) SP

open (6 - 7) closed (6 - 8) SP2
closed (6 - 7) open (6 - 8) SP3
closed (6 - 7) closed (6 - 8) SP4

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C) RELAY OUTPUTS

OUT 4

OUT 3

18
19

20

OUT 2

21
22

Fig. 7 RELAY OUTPUTS WIRING
All relay outputs are protected by varistor against inductive
load with inductive component up to 0.5 A.
The contact rating of the OUT 2 is 3A/250V AC 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.
The following recommendations avoid serious problems
which may occur, when using relay output for driving
inductive loads.

NOTES:

1) To avoid electrical shock, connect power line at last.

2) For supply connections use No 16 AWG or larger wires
rated for at last 75 °C.

3) Use copper conductors only.

4) Don’t run input wires together with power cables.

NO - OUT 4
NO - OUT 3

C - OUT 3/4

C

NO

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

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 show 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.

C

(mF)

0.047

0.1

0.33

R

(W)

100

22
47

P.

(W)

1/2

2
2

POWER

LINE

OPERATING

VOLTAGE

260 V AC
260 V AC
260 V AC

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4

VOLTAGE OUTPUTS FOR SSR DRIVE

+

OUT 2

16

_

+
_

17

SOLID STATE

RELAY

Fig. 9 SSR DRIVE OUTPUT WIRING
It is a time proportioning output.

Logic level 0: Vout < 0.5 V DC.
Logic level 1:

24 V + 20 % @ 20 mA.
Maximum current = 20 mA.

NOTE: This output is not isolated. A duble or reinforced
isolation between instrument output and power supply must
be assured by the external solid state relay.

LINEAR OUTPUT

This instrument is equipped with one isolated linear output
(OUT 1) programmable as:

- main output (heating or cooling)

- secondary output (cooling)

- analog retransmission of the measured value

- analog retransmission of the operative set point.

14

OUT 1

+

_

15

Fig. 10 mA OUTPUT WIRING
Output type: isolated 0 - 20 or 4 - 20 mA programmable.

Maximum load: 500 W.
Resolution:

- 0.1% when used as control output

- 0.05 % when used as analog retransmission.

+

20 mA

_

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5

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. 11 - 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).

D) POWER LINE WIRING

N

13

POWER LINE 100 V to 240 V A.C

(50/60Hz)

12

R (S,T)

or 24 V AC/DC

R (S,T)

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 electrical 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 to 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.

N

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