Connections; Standard Cable - Mantracourt ALA5 User Manual

Figure 2.1 Dimensions

Connections:

The ALA5 is supplied pre-wired with 2-core screened cable for the supply/signal and 4-core screened cable for the
loadcell connections.
If installing into a hazardous zone, the ALA5 must be connected via an approved ATEX Barrier with the following
parameters:
Uo = 28V, Io = 100mA, Po = 0.7W, Barrier Impedance 300Ω.
These are maximum values, actual barrier parameters will vary. However, the barrier impedance is not permitted to
change.
Please refer to Appendix A – 'Special conditions of safe use'
Two examples of suitable barriers are:
MTL7706+ (passive Zener diode type with active current limit) manufactured by MTL Instruments
KFD2-STC4-EX1/2 (3-way isolated type) manufactured by Pepperl and Fuchs

Standard cable:

IMPORTANT NOTE:
-25°C to +70°C.
Table 1
Country Supplier
UK Farnell
UK Farnell
Note 1: The maximum capacitance, Cc, can be taken as the capacitance between all cores connected together and
the screen (Annex C of the installations standard EN60079-14). A safety margin of +10% has been added.
3
Mantracourt Electronics Limited ALA5, ILEAtex and ICA5Atex User Manual
The cables factory-fitted to the ALA5 (see table 1) limit the operating temperature range to
Part No Description
1218651 Loadcell cable 1m: Belden 8132
Twin twisted pair cable (28 AWG)
100% overall foil shield + 65% tinned copper braided outer shield
O.D. 5.6mm
Capacitance: core to core 33 pF/m & core to shield 61 pF/m
Worst case capacitance: 224pF/m – see note 1
Temperature range: -30°C to +80°C
3855636 Output cable 5m: Van Damme 268006C
(per metre) Single twisted pair cable (24 AWG) + 95% tinned copper braided
798-551 shield
(100m reel) O.D. 4.85mm
Capacitance: core to core 100 pF/m & core to shield 165 pF/m
Worst case capacitance: 197pF/m – see note 1
Temperature range: -25°C to +70°C