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Reference Manual
IP2030/RM, Rev AA
Section 3: Installation
June 2014
Section 3: Installation10
3.2 Considerations before installation
Note
The Mobrey MCU900 Series is designed for non-hazardous (safe) area installation, but can
power and take input from an intrinsically safe transmitter installed in a hazardous area.
See Appendix B: Product Certifications for the control unit certifications.
3.2.1 Safety considerations
Guidelines
1. This product is classified type A in accordance with European EMC directive
2004/108/EC. To ensure electro-magnetic compatibility, in any member country, this
product should not be installed in a residential area.
2. Do not mount the control unit on a structure that is subject to vibration, or in a position
where damage may be caused by impact, thermal stress or liquid ingress.
3. The fuse must only be replaced with the type specified (see page 108 for procedure).
4. If the equipment is likely to come into contact with aggressive substances, it is the
responsibility of the user to take suitable precautions that prevent it from being
adversely affected, thus ensuring that the type of protection is not compromised.
Aggressive Substances - e.g. acidic liquids or gases that may attack metals or solvents
that may affect polymeric materials.
Suitable Precautions - e.g. regular checks as part of routine inspections or establishing
from the material's data sheet that it is resistant to specific chemicals.
5. The user should not repair this equipment.
6. Terminal 30 (intrinsically safe earth/ground) of the control unit must be connected to a
high integrity earth/ground point.
7. A mains powered Control Unit must not be connected to a supply exceeding 250 V
r.m.s. or dc, or to apparatus containing a source of voltage exceeding 250 V r.m.s. or dc.
8. A direct current (dc) powered control unit must not be connected to a supply
exceeding 30 Vdc or apparatus containing a source of voltage exceeding 30 Vdc.
9. The intrinsically safe outputs of the control unit may be connected to certified
equipment used in a hazardous area. Refer to Appendix B: Product Certifications for
details of relevant certifications.
10. Cable between the MCU900 Series control unit and a transmitter should be shielded,
twisted-pair with the shield connected to terminal 3 (marked with earth symbol) on the
MCU900 Series control unit. The shield should be left unconnected at the transmitter
unless there is a terminal specifically provided for this purpose.
11. Cable runs should be separate from any high voltage or mains cables to avoid crosstalk
or interference.
12. Refer to the technical data in Appendix A: Reference Data.