TECSYSTEM T2612, T2612-B, T2612-C, T2612-AD Instruction Manual

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T2612
T2612-B
T2612-C

T2612-AD

INSTRUCTION MANUAL

TECSYSTEM S.r.l.

20094 Corsico (MI)

Tel.: [phone]

Fax: [phone]

T2612 UNI

TECSYSTEM S.r.l ®

R. 1.3 07/09/12

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T2612 UNI

TECSYSTEM S.r.l ®

POWER SUPPLY

• Rated voltage 120 or 240 Vac 50/60 Hz

• Selection through voltage jumper

• Tolerance +/- 10%

• Power input protected by 500 mA fast

fuse

COMMUNICATION:
ONLY FOR T2612 AND T2612AD

• Standard serial output RS485 Modbus®
RTU

ANALOGUE OUT:
ONLY FOR T2612C AND T2612AD

• 1 output 4-20 mA ref. 0-240°C

INPUTS

• 4 inputs RTD Pt100 sensors - 3 wires

• 4th additional input (selectable)

• Removable rear terminals

• Input channels protected against electri-

cal and magnetic noises and spikes

• Sensors length cables compensation up

to 500 m (1mm²)

OUTPUTS

• 2 alarm relays (ALARM-TRIP)

• Output contacts capacity of ALARM, TRIP,

FAULT relays: 5A 220Vac cosφ=1

• Fan 1 and Fan 2 outputs protected by sepa­rate 10A slow fuses (max 16A)

• Output contacts capacity of FAN relays: 20A
220Vac cosφ=1

TEST AND PERFORMANCES

• Assembling in accordance with CE rules

• Protection against electrical and mag-

netic noises CEI-EN61000-4-4

• Dielectric strength: 2500 Vac for 1 min­ute from relays to sensors, relays to
power supply, power supply to sensors

• Accuracy: ± 1% full scale, ± 1 digit

• Ambient operating temperature: -20°C to

60°C

• Humidity: 90% non-condensing

• Housing: painted steel panel, frontal part

in polycarbonate IP65

• Burden 7VA

• Data storage 10 years minimum

• Digital linearity of sensors signal

• Self-diagnostic circuit

• Program and reading resolution: 1 digit

• Opt. Protection treatment of electronic

part

DISPLAYING AND DATA MANAGEMENT

• 1 display 20.5 mm high with 3 digits for dis­playing temperatures

• LED for displaying reference channel

• LED’s indicating alarm or trip channel

• LED indicating FAULT

• Temperature monitoring from 0°C to 240 °C

• 2 alarm thresholds for channels 1-2-3

• 2 alarm thresholds for channel 4

• 2 alarm ON-OFF thresholds for fan control

• Manually operated fans

• Sensors diagnostic (Fcc-Foc-Fcd)

• Entering the programming by frontal push

button

• Automatic stop of programming cycle after 1
minute of no operation

• Wrong programming automatic display

• Possibility of setting automatic channel

scanning, hottest channel, manual scanning

• Maximum temperatures and alarms storage

• Frontal alarm reset key

• Possibility of setting HOLD function for out-

put relays

DIMENSIONS

• Frontal panel: 320mm x 210mm

• Depth 90mm

1) TECHNICAL SPECIFICATIONS

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T2612 UNI

TECSYSTEM S.r.l ®

2) MOUNTING

Make a hole with the dimensions of 155 x 280 mm (See cut-out diagram at page 13)

3) POWER SUPPLY

Select the power voltage (120 or 240 VAC) through the “Voltage change” jumper.

REMARK: In case of unit replacement, to grant the correct and safe operating, you
must replace the sensors, relays, and power supply connecting terminals with the
new terminals provided with the unit: this only if the terminal blocks are of different
brand.

4) ALARMS AND FAN CONTROL ELECTRICAL CONNECTIONS

Take the removable terminal board off the unit before wiring.
ALARM and TRIP relays energize only when the prefixed temperature limits are reached.
The FAULT relay always energizes when the apparatus is powered and it resets when the
Pt100’s are damaged or when there is no power voltage.
The FAN relays can be used for fan control or else they can be included in the conditioning
circuit of the transformer box.

5) THERMOMETRIC SENSORS CONNECTION

Each Pt100 sensor has three conductors : one white and two red (CEI 75.8)
Fig.1 shows the disposition in the terminal board of the connection cables to the unit.
Channel 2 must be always referred to the central column of the transformer.
Channel 4 must be always referred to the ambient Pt100 sensor, if you want to monitor the
temperature of the transformer box through the T2612 unit.

6) PT100 EXTENSION CABLE: TECHNICAL SPECIFICATIONS

Cable 20xAWG 20/19 Cu/Sn
Section 0.55 mm²
Flame retardant Insulation PVC105
In accordance with CEI 20.35 IEC 332.1
Max working temperature: 90°C
Conformation : 4 terns of twisted and coloured conductors
Shield Cu/Sn
PVC flame retardant protection covering
External diameter 12.0 mm
Skeins of 100 m

In order to protect the electronic apparatus, we recommend the application of the
insulation transformer 240VAC/240VAC or 120VAC/120VAC.

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T2612 UNI

TECSYSTEM S.r.l ®

7) MEASURE SIGNALS TRANSPORT

All the transport cables of the Pt100 measure signals must absolutely:

• be divided from the power ones

• be realized with shielded cable with twisted conductors

• have a section of min 0.5 mm²

• be twisted if you have no shield

• be firmly fixed in the terminal board

• have tinned or silvered conductors

All the “T” series units have the sensors linearization with a max error of 1% v.f.s..

8) THERMOMETRIC SENSORS DIAGNOSTIC

In the event one of the thermometric sensors installed on the machine to protect is dam­aged, the FAULT relay energizes immediately, the ALARM and TRIP LED’s of the dam-
aged channel lighten and the FAULT LED is lightening.
The screen will automatically display a message showing the fault condition:

• Fcc sensor is short circuited

• Foc sensor is open

9) FCD FUNCTION - DEFECTIVE SENSORS

During the unit normal operation, if the Fcd-YES function has been selected, the display will
show Fcd indicating that a sensor is damaged and the LED corresponding to the affected
channel will lighten.
The FAULT relay will energize giving a signal to the operator.
After the replacement of the damaged sensor, you can reset the alarm pushing RESET until
the display shows the message rSt.

10) TEMPERATURES DIAGNOSTIC

When one of the thermometric sensors surveys a temperature exceeding by 1°C the alarm
limit, after 4 seconds the ALARM relay will energize and the ALARM LED of the affected
channel will switch on.
The same occurs when the TRIP temperature limit is detected: the TRIP relay energizes
and the TRIP LED corresponding to the affected channel is lightening.
When the surveyed temperature declines of 1°C below the prefixed limit for the ALARM and
TRIP switching , the relays de-energize and the respective LED’s switch off.

TECSYSTEM srl has realised a special cable for the measure signal transport
with all the protection requirements according to CEI Norms: mod. CT-ES

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T2612 UNI

TECSYSTEM S.r.l ®

11) COOLING-FAN CONTROL

The T2612 unit, if suitably programmed, can control the ON/OFF of the transformer fans
according to the set temperature values.
The fans of the machine can be controlled in two different ways:

• using the temperatures surveyed by the sensors on the three columns

CHF 1 2 3 - CH4 excluded

ALARM and TRIP LED 1.2.3 illuminated (e.g. F1: ON at 80°C - OFF at 70°C)

(e.g. F2: ON at 90°C - OFF at 79°C)

• by an additional sensor (CH4-YES) for the ambient temperature inside the transformer

box.

CHF 4
ALARM e TRIP LED Ch4 illuminated (e.g. F1: ON at 40°C - OFF at 30°C)

(e.g. F2: ON at 45°C - OFF at 35°C)

Press

▲ and ▼ key to select this function.

It is possible to operate the fans manually by pushing the AUTO/ON key.

12) FAN TEST

It is possible, through programming (HFn), to lay down that fans are activated for 5 minutes
each “xxx” hours, regardless of column or room temperature values (ex.: with HFn=001 fans
are activated for 5 minutes each hour; Maximum value: 240).
This function has the aim to periodically verify the working of the fans and their control ap­paratus during long idle periods.
Loading 000 value, this function is inhibited.

13) HOLD FUNCTION

To select the hold function choose the program option HLD-Yes. With hold function en­abled, when temperature exceeds the alarm set point value, the alarm relays will energize
and the alarm LED’s will illuminate until you reset the relay contacts in manual reset mode.
Reset is only possible when temperature falls below the set point value. To exclude the hold
function select the program option HLD-no.

14) DISPLAY MODE

By pressing DISPLAY MODE you can select one of the three display modes:

• HOT : the display shows automatically the temperature of the hottest channel

• MAN : each channel may be viewed manually by pressing the

▲ or ▼ key.

• T.MAX: the unit shows the max. temperature recorded by the sensors and any alarm
recorded after the last reset. To check the channels press

▲ or ▼ key.

• SCAN : channels cyclically change every 2 seconds