APPENDIX B
TECHNICAL SPECIFICATION
INPUT PERFORMANCE @20C
Type
Nominal range
(vii)
Resolution
(vi)
Accuracy
(i)
TC K
-270 to 1200C
0.1C
1C
TC J
-210 to 760C
0.1C
1C
TC T
-270 to 400C
0.1C
1C
TC R
0
to 1750C
0.5C
2C
TC S
0
to 1750C
0.5C
2C
TC E
0
to 650C
0.5C
1C
TC F
0
to 600C
0.5C
1C
TC N
0
to 1300C
0.5C
1C
TC B
1000 to 1800C
0.5C
3C
Cold Junction
0
to 50C
(iii)
0.1C
1C
(v)
Pt100
-200 to 800
0.05C
0.1 +/- 0.1%
(ii)
10volts
-10V to 10V
0.004%
0.02%
1-5volts
1V
to 5V
0.008%
0.04%
1volt
-1V to 1V
0.004%
0.02%
100mV
-0.1V to 0.1V
0.004%
0.02%
4-20mA
4 to 20mA
0.004%
0.1%
0-20mA
0 to 20mA
0.004%
0.1%
0-10mA
0 to 10mA
0.004%
0.1%
Transmitter excitation voltage:
19V
Maximum transmitter excitation current:
25mA
APPENDICES
APPENDIX B
SG4-2069-04
Page 75
ADDITIONAL INPUT SPECIFICATION
Input
Average
(iv)
Input impedance Thermal drift
Type
Acquisition Rate (RTD current)
per C
T/C
6.8Hz
1M ohm
(ix)
0.001%
mV
8.9Hz
1M ohm
(ix)
0.001%, 0.004%
(x)
Volts
8.9Hz
2M ohm
0.002%, 0.011%
(xi)
Current
8.9Hz
51 ohm
0.001%
Pt 1001.7Hz
(less than 1.1mA) 0.013C
Cold junction(see T/C)
NA
0.06C
Isolation
Power Supply:
2500VAC
)
Output Options:
500VAC
) see safety information
Comms Interface: 500VAC
) on page 8
INPUT OVER-RANGE PROTECTION
Input Pin
Usual Function
Absolute Maximum Rating
1
0V
NA
2
RTD
30VAC
(xii)
3
Volts
200VAC
(xii)
4
Millivolts
200VAC
(xii)
5
Curret
100mA
RELAY OUTPUT BOARD (OPTION 01 AND 02)
Maximum Rated Load
7A@250V 7A@30V
Maximum Power
1750VA
210W
Maximum Switching Voltage
380V
125V
Electrical Life
10
5
operations at rated load
Mechanical Life
50 million operations
Contact shunt capacitance
200pF
This is due to the Varistor and causes a reactance of 15Mohms at 50Hz.
Alarm detection delay
200mS
APPENDIX B
APPENDICES
Page 76
SG4-2069-04
CURRENT RETRANSMISSION BOARD (SOURCE AND SINK) OPTION 03
PERFORMANCE @20C
Accuracy:
20uA
(0.1% of Max current)
Resolution:
2uA
(0.01% of the input range )
Response:
100ms for approx 63% of step change
Minimum Current O/P:
0mA
Maximum Current O/P:
21mA (approx)
Thermal Drift:
900nA/C (0.0045% of Max current /C
)
Maximum loop impedance:
1000 ohms
(Source)
Output voltage drop @20mA:
3 Volts
(Source & Sink)
Maximum external loop power supply voltage:
30VDC
(Sink)
Minimum practical loop power supply voltage:
(R
L*
21mA)+3
(Sink)
Where R
L
is the Loop impedance
Ripple Current:
Approx 5uA
Isolation:
Input
500VAC
)
Power Supply
2500VAC
) See safety information
Comms I/F
500VAC
) on page 8
VOLTAGE OUTPUT BOARD (OPTION 04) PERFORMANCE @20C
Range :
2-24 volts DC
Accuracy:
24mV
(0.1% of Max voltage)
Maximum Current O/P:
50mA
(xi)
Thermal Drift:
1080uV/ C (0.0045% of Max voltage /C)
Ripple:
Approx 6mV
Fixed Voltage:
24V
Programmable Voltages:
2,2.5,3,3.5,4,4.5,5,6,7,8,9,10,12,15,20
Isolation:
Input
500VAC (see safety
Power Supply
2500VAC (information
Comms I/F
500VAC (on page 8
APPENDICES
APPENDIX B
SG4-2069-04
Page 77
RS485 COMMUNICATION OPTION
GENERAL
Configuration
Four wire, Half Duplex
Maximum fan-out
32 units
(viii)
Baud Rate
9600
Data bits
8
Start bits
1
Stop bits
1
Parity
none
Maximum line length
4km
Protocol
based on ANSI X3.28
TRANSMITTER
Maximum differential output voltage
5v
Output voltage with 50ohm load
>1.5v
RECEIVER
Differential input threshold voltage
+/-200mV
Input receiver impedance
12kohms
Common mode range
-7v to +12v
ENVIRONMENTAL
Ambient operating temperature range
0 to 50C
Ambient storage temperature range
-20 to 80C
Relative Humidity
20% to 95% non condensing
EMI Emissions
BS EN50081-1
EMI Susceptibility
BS EN50082-1
Safety
BS EN61010-1
Power Supply
240VAC,110VAC,24VAC 50/60Hz
Power consumption
6.5Watts max
Max in-rush current
100mA @240VAC
Front panel sealing(with gasket)
IP65
APPENDIX B
APPENDICES
Page 78
SG4-2069-04
PHYSICAL
Dimensions
48 x 96 x 140mm
Mounting
Panel cutout(91 to 92)mm x (43 to 44)mm
Terminals
All two part captive screw terminals
Weight
850g
(i)
The accuracy values represent +/- spread from nominal. Unless otherwise
stated '%' represents the percentage of full scale value.
(ii)
'%' represents percentage of reading in stated units
(iii)
Represents the valid thermistor temperature range used for measuring Cold
junction temperature.
Slight internal warming from the unit means that temperature is 3 or 4C
above ambient.
(iv)
Average taken over a 1 second time frame. Acquisition defined as complete
refresh of electrical sensor value including readings to compensate for gain
and offset errors.
(v)
Cold junction accuracy includes thermal tracking error, temperature
measurement error and linearisation
error. This should be added to the
individual thermocouple accuracy to get an overall accuracy value.
(vi)
'%' represents percentage of full scale value.
(vii)
Input is measured correctly within a small margin outside the normal range.
This is 7% for bipolar (+/-) electrical inputs. Current inputs that go down to
zero do not under-range otherwise all other sensor inputs have a 7%
over/under-range margin.
(viii) This may be extended with suitable buffering
(ix)
There is an internal 10M ohm pull down resistor to -2.5V. This is only
significant for high source impedance mV inputs.
(x)
50mV and 100mV respectively.
(xi)
1V and 10V respectively.
(xii)
With respect to Pin 1 or Pin 5.
APPENDICES
APPENDIX B
SG4-2069-04
Page 79
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