The control unit is designed for installation in a safe area only. Positioning of the
instruments should be chosen with regard to the following points:
•
Away from sources of local heat with room for adequate ventilation
•
Within easy reach and audible distance of operating personnel
•
Convenient to a separately fused power supply
•
Incoming sensor cables and outgoing alarm annunciation
•
Sensor cables to be electrically shielded, steel wire armoured or screened cable
•
Sensor cables to be run separately from power cables.
Mains operated Units
•
The equipment should be supplied from a 2A fused/switched spur.
•
The spur unit should be identified and positioned locally to the equipment.
•
To prevent lateral cable movement the mains cable within the enclosure should be
restrained using a clamp.
•
Earth leads within the enclosure should be a minimum of 300mm longer than the
mains Live and Neutral cores
Field cables which are terminated within the control unit enclosure should be kept as
short as possible and not allowed to cross over electronic components or the ribbon
cable. See Figures 2, 3 and 5 for connection details.
To prevent any effect from earth currents the cable shielding should be grounded at the
equipment end only.
The instrumentation should be subjected to a minimum of vibration and shock.
Ascertain the voltage rating of the power supply to which the instrument will be connected
The Type of cable which should be used is:
Addressable CAN bus:
4 core,
1.5mm screened
Direct:
2 or 3 core, 0.5mm screened
DO NOT POWER UP THE INSTALLATION PRIOR TO COMMISSIONING BY OUR
ENGINEERING STAFF.
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