Eurotherm/Barber-Colman T640, Integrated Loop Processorr

SPECIFICATIONS for T640 Base Unit

Mechanical

Fascia dimensions:

height 144mm, width 72mm.

Mounting panel aperture:

height 138 +1 �0 mm, width 68 +0.7 �0 mm.

Behind mounting panel:

depth 258mm (measured from panel front).

Front of mounting panel:

depth 10.6mm.

Weight:

2.15kg.

Environmental

This product conforms to EMC Directive 89/336/EEC amended by 93/68/EEC, and with European Low Voltage Directive 72/23/EEC.

Electrical safety:

EN61010-1: 1993/A2:1995

EMC emissions:

EN50081-2 industrial

EMC immunity:

EN50082-2 industrial

Storage temperature:

�10�C to +85�C, at humidity of 5-95% (non condensing)

Operating temperature:

0�C to +50�C. The enclosure must provide adequate ventilation, and heating if required to avoid condensation at low temperatures.

Atmosphere:

Unsuitable for use above 2000m or in explosive or corrosive atmospheres.

Front panel sealing:

IP65.

Isolation:

LIN and ALIN ports are double-insulated as specified in EN61010 to provide protection

against

electric shock.

Vibration:

BS2011 Part 2.1, Test Fc, Table CII, �Equipment intended for large power plant and general industrial use� (2g, 10-55 Hz).

Shock:

BS2011 Part 2.1, Test Ea, Table II, �General test for robustness, handling and transport� (15g, 11ms).

Relays

Alarm relay:

SPST. 24V ac/dc at 1A.
Absolute maximum rating 30V rms, 60V dc.

Watchdog relay:

SPST. 24V ac/dc at 1A.
Absolute maximum rating 30V rms, 60V dc.

Power supplies

Mains version

Input voltage range:

90-265V ac rms.

Input frequency range:

45-65 Hz.

Maximum peak input current:

1.1A.

Power rating:

25VA

Holdup time:

20ms.

Fuse:

20 � 5 mm 250V ac antisurge cartridge, 500mA.

Number of inputs:

2 � Ch1 (main input) Ch 2 (backup).

Input voltage range:

19-85 V (including rectified 48V ac).

Power rating:

25VA.

Holdup time:

20ms.

Fuse:

20 � 5 mm 250V ac antisurge cartridge, 2A.

ALIN

The ALIN runs on screened twisted pair. Phase A, pin 21, should be bussed to other Phase A signals and likewise Phase B, pin 22. The cable screen should be connected to ALIN Gnd, pin 20. The ALIN connections are galvanically isolated within the T640 to assist with noise rejection and simplify system wiring.

The key specifications of the ALIN are summarized as follows:

Cable type:

screened twisted pair.

Impedance:

100Ω*, nominal.

Network topology

single non-branching network.

Network terminations:

100Ω* at each end.

Maximum load:

16 nodes.

Maximum length:

100 metres.

Grounding:

single point ground per system

HIGH LEVEL I/O

The specification given below is for a single I/O site. The T640 supports two I/O sites. For implementation reasons the electronics for both sites is on a single board. The I/O connections for the second site are brought out through a simple interconnection board. For this reason, the high level option cannot be chosen for site 2 if it has not been chosen for site 1.

Analogue inputs

Channels:

Input range:

0-5V and 0-10V, with software selectable range.
0-1.25V range jumper-selectable.

Resolution:

0.025%.

Accuracy:

0.05% of range.

Gain drift:

30ppm/�C.

Offset drift:

65μV/�C.

Input impedance:

1 MΩ pull-down to �1.2V.

Break detection:

within 1 sample. Protection strategy selected from within the configuration (up-scale, down-scale, etc.).

Isolation:

none.

Sample rate:

9ms per configured input. Only the configured inputs are scanned. The fastest loop update cannot be less than 20ms.

Internal burden resistors

Values:

HIB option � 250Ω
HGB option � 62Ω.

Power:

0.25W.

Tolerance:

0.1%.

Temperature coefficient:

15ppm/�C.

Note.
Tolerances and temperature coefficients must be added to the specified analogue input tolerances.

Transmitter power supplies

Channels:

Voltage:

24V �5%.

Current:

0-22mA.

Current limit:

30mA maximum.

Isolation:

60V working.

Voltage analogue outputs

Channels:

Output range:

0-5V and 0-10V, with software-selectable range.
0-1.25V range jumper-selectable

Resolution:

12 bits (1.25 and 2.5mV, for the 5 and 10V ranges resp.).

Accuracy:

0.05% of range.

Gain drift:

30ppm/�C.

Offset drift:

70μV/�C.

Current drive:

�5mA.

Overload detection:

triggered if the output cannot maintain the desired voltage.

Isolation:

none.

Current analogue outputs

Channels:

Output range:

0-20mA.
(Rangeable 0-10mA, 0-20mA, 4-20mA etc.).

Over-range:

22mA.

Resolution:

5μA.

Accuracy:

0.1%.

Gain drift:

80ppm/�C.

Offset drift:

0.9μA/�C.

Output drive:

0-1kΩ.

Isolation:

60V working.

Digital inputs

Channels:

Thresholds:

logic 1: 7.5V minimum
logic 0: 2.5V maximum.

Hysteresis:

1.0V minimum, 3.5V maximum.

Input voltage:

28V maximum.

Input impedance:

200kΩ for inputs <10V, 100kΩ for inputs >10V.

Digital outputs

Channels:

Output levels:

logic 0: 0V
logic 1: 15V

(14.0V-15.5V internal supply, or external supply).

External supply:

15.5V minimum, 28V maximum.

Drive impedance:

logic 0:

68Ω, 25mA maximum sink current

logic 1:

2.2kΩ

THERMOCOUPLE I/O

The specification given below is for a single I/O site. The T640 supports two I/O sites.

mV/Thermocouple inputs

Channels:

Resolution:

>14 bits

Accuracy @ 25�C:

0.1% of mV range

Temperature drift:

less than � (0.7μV + 0.008% of reading)/�C @ 99% confid.

(less than � 0.3μV + 0.003% of reading)/�C typically)

Input Isolation:

250V ac rms

Break detection:

within 1 sample period (with options to go highscale, low-scale or retain last good value).

50/60Hz rejection:

60dB SMR, 120dB CMR (software-selectable between 50Hz and 60Hz)

Low level (mV) input mode

Input ranges:

�14.2 to 77mV, -7.1 to 38.5mV-3.5 to 19.2mV and -1.8 to 9.6mV (software-selectable)

Thermocouple input mode

Input ranges:	J	�210 to 1200�C	K	�270 to 1372�C
	T	�270 to 400�C	S	�50 to 1767�C
	R	�50 to 1767�C	E	�270 to 1000�C
	B	0 to 1820�C	N	0 to 1300�C
	W	1000 to 2300�C	W3	0 to 2490�C
	W5	0 to 2320�C	MoRe	0 to 1990�C

CJC accuracy @ 25�C:

�0.25�C to +1.1�C

CJC ambient rejection:

30:1 typically

Analogue input

Channels:

1, non-isolated (software-selectable between voltage and frequency input modes).

Voltage input mode

Input ranges:

0 to 10V, 0 to 2.5V (software-selectable)

Out of range capability:

� 10%

Accuracy @ 25�C:

0.1% of scale

Resolution:

>14 bits over 0-10V, 0-5V and 1-5V rangings

Temperature drift:

less than � (100μV + 0.008% of reading)/�C @ 99% confid.

(less than � 40μV + 0.004% of reading)/�C typically)

Break detection:

within 1 sample period (with options to go high scale, low scale or retain last good value)

Frequency input mode

Input ranges:

0.01Hz to 30kHz, 0.01Hz to 3kHz,
0.01Hz to 300Hz, 0.01Hz to 30Hz (software-selectable).

Over-range capability

up to 48kHz

Resolution:

>14 bits

Min. pulse length

8μs

Response time:

above 20Hz:

200ms maximum

below 20Hz:

waveform period + 200ms

Maximum Accuracy:

0.02% of reading

Timebase accuracy:

0.05% over 5 years

Gain drift:

<1ppm/�C

Max. tantalization rate:

1kHz � with simultaneous frequency measurement (LoFloTot set to TRUE)

48kHz � without simultaneous frequency measurement (HiFloTot set to TRUE)

Process output

Channels:

Output range:

0 to 20mA can be software ranged as 0-10mA, 0-20mA, 4-20mA, etc.

Isolation:

60V ac rms

Accuracy @ 25�C:

0.1% of scale

Resolution:

12 bits (5μA)

Temperature drift:

less than � (0.4μA + 0.008% of reading)/�C @ 99% confid

(less than � (0.2μA + 0.004% of reading)/�C typically)

Output drive capability:

0 to 1kΩ

Output fault detection:

Load fail detect (triggered if the output cannot maintain the desired current level), Over-driven detect (triggered if the output is overdriven by a larger current).

Output kill:

forces the output to low-scale current output, and
to a low-impedance state (<1V drop at 20mA). (Kill activated by connecting Kill terminal to I+ terminal, reported in flag Status.Killed.

Analogue output

Channels:

Output range:

0 to 10V can be software ranged as 0-10V, 0-5V, 1-5V, etc

Accuracy:

0.1% of scale

Resolution:

12 bits (2.5mV)

Temperature drift:

less than � (160μV + 0.009% of reading)/�C @ 99% confid.

(less than � (60μV + 0.004% of reading)/�C typically)

Output current drive:

+5mA (source), -0.3mA (sink)

Digital inputs

Channels:

3 (individually isolated)

Input isolation:

250V rms ac Input type: current sinking, polarized (but accepts ac)

Input voltage:

nominally 24V

absolute max. �40V

Threshold tolerance:

min. input for logic �1� 13.7V

max. input for logic �0� 5.8V

Input current:

max. current for logic �0� 0.1mA

min. current req. to ensure logic �1� 0.9mA

max. current at 30V 4.0mA

Digital outputs

Channels:

3 (non-isolated)

Output levels:

software-selectable between:
24V internal or external pull-up (open-drain)

Internal pull-up:

21.5V to 24.6V through 3.6kΩ

External pull-up:

60V absolute maximum

Sink current:

120mA maximum, <1V drop at 40mA

Fan-in/fan-out:

Maximum of 2 isolated digital inputs can be driven from a single non-isolated digital output.

General

The environment, physical, and electrical specifications for the High-level I/O and Thermocouple I/O assembly are the same as for the base unit. The confidence limits specifications quoted above have been generated in accordance with BS4889 �appenix A

Last Updated Friday, July 29, 2005