Electrical Connections - M&C SP Series Instruction Manual

For option 3VA connect the suitable tube (blow back or test gas) at the probe.
A back-purging gas suitable for the sampling point must be selected for back-
purging. At sampling points with inerting, back-purging must be performed with
corresponding inert gas. It must be ensured that the inert gas does not
introduce oxygen or combustible gases into the system.
The back-purging pressure must always be higher than the process pressure.
This minimum pressure must be monitored with a press switch at the inlet side
of the accumulator or the check valve. If the flush gas pressure drops below the
Warning
process pressure, the back-purging solenoid valve must not be operated.
The maximum permissible pressures of 6 bar abs. must not be exceeded (see
chapter 11 Technical data).
The probes SP3110 and SP3110V with blow back option or test gas option 3VA
must not be used for taking sample from zone 0.
For option pneumatic ball valve drive MS1 connect the suitable tube (e.g. control air) at the probe.
The permissible pressures of 3 up to 8 bar are not allowed to be exceeded or to fall below (see
chapter 11 Technical data).
The used pressure air can be dry or oily.
15

ELECTRICAL CONNECTIONS

Warning A wrong supply voltage can damage the device. Make sure that the supply
voltage corresponds to the voltage shown on the rating plate before connecting
the device.
The requirements of VDE 0100 and its associated standards and regulations
must be observed when erecting high-voltage power installations with rated
voltages of up to 1000 V! In any case, we recommend the use of heat-resistant
cables.
An external main switch must be provided.
The cable of the solenoid valve must be connected in a suitable EEx e
connection box.
www.mc-techgroup.com SP3110../SP3110V.. | 1.00.02 29