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MAN0448_Issue 13_01-2010
5704 Control System
005704-M-5001 A03249
CHAPTER 4 - INSTAllATION INSTRUCTIONS
11.2 Sensor line Resistance
Sensors should be located such that the line resistance of cable does
not exceed the maximum permitted. The table below gives a quick guide
to the maximum cable lengths permitted for specific sensors, when
connected by stranded copper conductor cables of various sizes to a
System 57 running at the minimum dc input voltage.
Maximum Cable Length (m)
Device or Sensor Type
Conductor Cross Sectional Area
AWG
21
19
18
16
14
mm˝
0.50 0.75
1.00
1.50
2.50
704/705
500
750
1000
1500
2500
780 (at 200mA bridge current) 500
750
1000 1500 2500
811
5600
8400
11200 16800 28000
910 (Single pair at 200mA)
480
720
960 1400 2400
910 (2 pair at 200mA)
230
340
460 690 1100
911
5600
8400
11200 16800 28000
SensePoint Flam. LEL/ppm
500
750
1000
1500
2500
SensePoint Toxic
3200
4800
6400
9600 16000
SignalPoint Flamable
500
750
1000
1500
2500
SignalPoint Toxic
2000
3000
4000
6000 10000
Digi-Cat
400
570
800
1150
1850
Digi-Chem
1000
1500
2000
3100
4800
Digi-Ana
1000
1500
2000
3100
4800
Digi-Optima
180
260
360
540
860
Life Line
3200
4600
6500
9750 15000
Searchline
(minimum dc supply 21V)
60
90
120
180
300
Searchpoint 500
32
48
64
96 160
Searchpoint OPTIMA
(minimum dc supply 19V)
180
270
360 540 900
Series 2000 Flammable
450
670
900 1300 2200
Series 2000 Toxic
1600
2400
3200 4800 8000
Searchline Excel Receiver
(Minimum dc supply 21V)
90
135
179
271
449
Searchline Excel Transmitter
(S/R) (Minimum dc supply 21V) 141
211
282
425
704
Searchline Excel Transmitter
(L/R) (Minimum dc supply 21V)
94
141
188
283
998
Searchline Excel Cross Duct
Transceiver assembly
(Minimum dc supply 21V)
55
82
109
165
274
Searchpoint Optima Plus
159
237
315
476
787
Apex - Toxic
180
270
360
540
900
Apex - Combustible/Thick Film
130
195
260
390
650
Opus/LLII - Toxic
300
450
600
900
1500
Opus/LLII - Combustible
250
375
500
750
1250
The figures in the table above provide a useful reference guide to
maximum cable lengths, however, in many circumstances longer cable
runs can be used. eg. Where the dc input voltage is higher than the
minimum. In these circumstances a more detailed analysis is required
to determine maximum line resistance.
WARNING
It is required that verification by testing that cable faults (open circuit and
short circuit) at the transmitter’s side are correctly detected by the control
card. The control card shall indicate ER81, ER87 or ER88 in this case.
Summary of Contents for 5704
Page 1: ...System 57 5704 Control System Operating Instructions ...
Page 4: ...4 MAN0448_Issue 13_01 2010 5704 Control System 005704 M 5001 A03249 ...
Page 6: ...6 MAN0448_Issue 13_01 2010 5704 Control System 005704 M 5001 A03249 User Notes ...
Page 14: ...1 8 MAN0448_Issue 13_01 2010 5704 Control System 005704 M 5001 A03249 User Notes ...