Gefran 40 TB Data Sheet

40 TB

TEMPERATURE AND PRESSURE DOUBLE INDICATOR / ALARM UNIT

Main Applications

• Indication and alarm of

melt temperature and pressure
on extrusion lines.

• Test benches.

• Food processing plants:

temperature and pressure
indication.

• Weighing

• Pressure switches, thermostats

• Textile plants

Main features

• Inputs configurable from faceplate.

• Easy strain-gauge calibration with

sensitivity auto-ranging.

• Control of sensor power supply (input 1).

• Selectable code protection.

• Possibility to configure the unit.

• Power supply for transmitters.

• Easy to configure . Custom

linearization available.

• Engineering units of the most common

physical quantities available either on
display or on labels.

• Acquisition and alarm programmable

from 15 up to 120 msec. with resolution
from 16000 to 4000 divisions

• Retransmission of variable values

• 3 alarms completely configurable from

faceplate.

• 4-wire, configurable serial line.

Protocol:
GEFRAN CENCAL or MODBUS

PROFILE

The 40 TB is a microprocessor based,
2-channel alarm unit, format 96x96
(1/4 DIN), manufactured with SMT.
Its operator interface is comprehensive
and efficient, with two 4-digit displays for
the two process variables and engineering
units indications. It is also equipped with
a red LED bargraph, which can be
associated to process variables and to
peak values. Three LEDs indicate the
output status, while 3 more LEDs can be
configured to indicate different functional
conditions. The instrument has a lexan
membrane faceplate (guaranteed to IP65)
with 4 keys.
Channel 1 has strain gauge, pressure or
force sensor inputs, with positive or
symmetrical polarisations, calibration with
sensitivity auto-calculation (from 1,5 up to
4 mV/V), indication of probe power supply
break.
The first input channel can also receive
signals from potentiometers with 100Ω
min. resistance. The A/D converter
performance can be configured via
keyboard, so that different options of
sampling time can be selected,
depending on the desired resolution.
Sampling time can be as low as15msec.,
while resolution can reach a max. value

of 16,000 divisions (by a 120msec.
sampling time). The second input channel
can be configured for inputs from
temperature sensors (TC, RTD, PTC,
NTC) and for mV, V, mA signals, with the
ability to have of having a customized
input for each kind of sensor .
The selection of the different options is
available from keyboard. There is the
possibility of having two digital inputs
from voltage-free contacts, configurable
for functions such as reset, hold, flash,
peak or memory reset control.
The instruments can be equipped with up
to three relay (5A/250V) or static (0-11Vdc)
outputs.
Two voltage or current analogue outputs
are available for the retransmission of
inputs, of alarm sets, of gross and tare
values. The serial communication option
may have current loop, RS422/ 485 and
RS232 connections with baud rate up to

19200.
The option “transmitter power supply” is
foreseen for each input channel.
For channel 1 it could be: 1V (potentiometer),
5 and 10V (strain-gauge), 15 and 24V ; for
channel 2: 15 and 24Vdc.
The programming of the instrument is
made easy by grouping the parameters in
function blocks and by a simplified data
entry menu. The configuration can be

simplified even further using the PC
programming kit containing connection
cable and a menu guide program that
runs under Windows (see technical data
code WINSTRUM).
A configurable personal software
protection code (password protection)
can be used to restrict the levels of
editing and displaying the configuration
parameters.

TECHNICAL DATA

INPUTS

Accuracy 0.2% f.s. ± 1 digit.

- Input 1

Sampling time 120 msec. with control of
sensor power supply, configurable down
to a minimum of 15 msec. with reduction
of the resolution to 4000 points.
Configurable decimal point position for
linear inputs, for strain gauge inputs or
potentiometer range -1999…9999,
indication of min. and. Max. over-range for
linear inputs. A 32-segment custom
linearisation can be entered.

- 4/6 wire strain gauge 350Ω, sensitivity:

1.5…7.5mV/V by 10V power supply

1.5…15mV/V by 5V power supply.

A - Indication of input 1 variable,

13mm high digits, red LED display.

B - Indication of input 2 variable,

13mm high digits, red LED display.

C - “Function” key
D - “Lower” key
E - “Raise” key
F - Configurable function key (CAL standard)
G - Indication of CAL, ZERO, REM, red LED display
H - Indication of Out1, Out2, Out3 alarms, red LED display.
I - Label for engineering units

IP 65 faceplate protection

FACEPLATE DESCRIPTION

Positive or symmetrical polarisation and
calibration that automatically calculates
the sensitivity.

- Potentiometer supply 1.2V >100Ω

-Current 0…20mA, 4…20mA, Ri= 50Ω.

- Input 2

Sampling time 120 msec. for temperature
sensors, for linear inputs, configurable
down to a minimum of 15 msec. with
reduction of resolution to 4000 steps.
Configurable decimal point position for
linear inputs, for TC, RTD, PTC, NTC
inputs only one decimal point is allowed
in the maximum display range of

-199.9…999.9.
Indication of open circuit thermocouple or
RTD, PTC, NTC in open or short circuit,
indication of over- and under-range for
linear inputs.

TC – Thermocouple

Cold junction auto-compensation.

J (Fe-CuNi) 0...1000°C / 32...1832°F
K (NiCr-Ni) 0...1300°C / 32...2372°F

R (Pt13Rh-Pt) 0...1750°C / 32...3182°F
S (Pt10Rh-Pt) 0...1750°C / 32...3182°F
T (Cu-CuNi) -200...400°C / -328...752°F
B (Pt30Rh-Pt6Rh) 44...1800°C / 111...3272°F
E (NiCr-CuNi) -100...750°C / -148...1382°F
N (NiCrSi-NiSi) 0...1300°C / 32...2372°F

(

Ni-Ni18Mo) 0...1100°C / 32...2012°F
L-GOST (NiCr-CuNi) 0...600°C / 32...1112°F
U ( ) -200...400°C / -328...752°F
G ( ) 0...2300°C / 32...4172°F
D ( ) 0...2300°C / 32...4172°F
C ( ) 0...2300°C / 32...4172°F
Custom -1999...9999

RTD 3 wires

Pt100 -200...600°C / -328...1112°F
JPt100 -200...600°C / -328...1112°F

PTC

990Ω 25°C

-55...120°C / -67...248°F

NTC

1 KΩ 25°C

-10...70°C / 14...158°F

DC – Linear

With scale configurable within the limits:

-1999...9999 (4 digits)

0...60mV / 12...60mV

0...10V / 2...10V

0...5V / 1...5V

0...1V / 0.2...1V

0...20mA / 4...20mA
Input impedance for voltage signals
Ri>500Ω for V ≤ 1V; Ri >20KΩ for
V > 1V, for current signals: Ri = 50 Ω.
A 32-segment configurable linearisation
can be used.

Digital

2 inputs from contact free of potential.
The function is selectable among stored
alarm reset, hold, flash, zero, selection of
peak value (minimum, maximum, or
peak-to-peak).

OUTPUT

Relay with NO(NC) contacts 5A, 250V
cosϕ=1. Three alarms configurable as
output to calibrate 6-wire strain-gauge
probes.

Analogue retransmission

1500V Isolation

- 2 configurable retransmission analogue
outputs.

- Range configurable from keyboard.

- 0…10Vdc; 0/4…20mA configurable
outputs.

- Resolution 4000 steps.

SERIAL LINK

4-wire, optoisolated.
Passive current loop configurable
interface (1200 bauds), RS232 and
RS422/485 (1200, 2400, 4800, 9600,
19200 bauds) Protocol: GEFRAN,
CENCAL or MODBUS.

POWER SUPPLY

Standard: 100…240Vac/dc ±10%
On demand: 20…27Vac/dc ±10%
50/60Hz; 12VA max.
Protected by an internal fuse (not
replaceable by the operator).

SENSOR POWER SUPPLY (VS)

1.2Vdc for potentiometer > 100Ω
5Vdc, 10Vdc max 120mA for strain-gauge
Available for input 1 (Terminal 11).

TRANSMITTER POWER SUPPLY (VT)

24Vdc ±10% max. 50mA
15Vdc ±10% max. 80mA
Available for input 1 (Terminal 11) and
input 2 (Terminal 3).

AMBIENT CONDITIONS

Working temperature range: 0...50°C
Storage temperature range: -20...70°C
Humidity: 20...85% HR non condensing

ALARMS

- 3 alarm points configurable as absolute,
relative, with direct or inverse function.

- Alarm points with configurable limits on
the whole selected scale.

- The hysteresis of each alarm is
configurable individually.

- Alarm masking with exclusion on power
up, with memory, delay and minimum
alarm/intervention time.

- Alarms can be associated to single
inputs, either as “OR” or “AND”.

WEIGHT

Full version: 600g

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