24
General
Warnings Concerning the use of Electrical Modules (E and ET)
The measurement and generation terminals of MC5P are pro-
tected against over voltage and over current as far as it has
been possible without affecting the accuracy. The circuits are
designed so, that you can connect a voltage source 50VDC/2A
between any terminals without damaging the device. However,
long exposure to this kind of stress may affect the accuracy.
Although there is a galvanic isolation between MC5P’s ET and
E modules, it is for functional purposes only. The max. 50 V
restriction applies between these modules too.
Maximum output voltage from MC5P’s terminals is below 30 V.
If you, however, connect together voltages from the ET and E
sections or if you connect external voltages to MC5P, the re-
sulting voltage may be high enough to be hazardous.
General Warnings Concerning Pressure Measurement
The accessory polyurethane hose supplied with an MC5P with
pressure modules is rated to the maximum pressure of 20 bar
at 21°C (290 psi at 70°F). Applying higher pressure can be haz-
ardous.
To avoid damaging the module, use hand tightening only when
connecting the pressure measurement hoses (max. torque 5
Nm, approx. 3.6 lbf ft). If the use of tools is required to secure
the connection (typically pressure modules with a pressure
range higher than 20 bar), apply the counterforce by placing a
14 mm (approx. 9/16”) A/F spanner on the flats found in the
module’s connector.
Always depressurize the system before opening or connecting
any pressure fittings or connectors. Use proper valves for vent-
ing the system. Ensure that all connections are made correctly
and that the hose and the connectors are intact.
Always use the pressure media stated in the module’s sticker.
Using unsuitable pressure media may destroy the pressure
module.
Never exceed the maximum pressure of a pressure module, be
it internal or external. The pressure module’s maximum pres-
sure is stated on the module’s sticker. The maximum pressure
of external modules is also mentioned in the Instruction Leaf-
let that is provided with the external module.
Never plug a hose with your hands or put the hands in front of
a gas spray coming from a leakage. A gas bubble in the blood
circulation can cause death.
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