Design And Principle Of Operation - Samson Media 5 Mounting And Operating Instructions

Design and principle of operation

2 Design and principle of oper-
ation
The option module with a 4 to 20 mA
current loop can be added to the Media 5
Differential Pressure and Flow Meter. It
allows the measured value to be
electronically processed for measuring and
control tasks. The loop current is proportional
to the pressure and is measured from the
pointer position of the Media 5 device
without any contact or interference.
The option module is installed in the Media 5
device. When ordered together with the
Media 5 device, it is installed already in the
delivered state. In all other cases, it can be
retrofi tted by the customer.
4
6
Nameplate
(label)
1 Printed circuit board with operating controls
2 Terminal board
3 Magnetoresistive measuring system with mating
plate
4 Self-adhesive dot on fi lm
5 Cable gland
6 Nameplate (label)
Fig. 1: Current output option module
2
3
1
2
5
Notes on explosion protection
The option module is available in two differ-
ent versions:
The following applies to the version with
explosion protection (100049064):
1. When working on explosion-protected
versions of the option module, personnel
must undergo special training or instruc-
tions or be authorized to work on explo-
sion-protected devices in hazardous ar-
eas.
2. The current loop must be supplied only
by a supply unit which has a equivalent
or higher explosion protection approval.
Its electrical connection data must be
lower or identical to those in the explo-
sion protection certifi cate of the
Type 5005-3 device.
3. Permission to operate the option module
in hazardous areas becomes void after
the following events:
– One of the permissible electrical
values listed in the explosion-
protection certifi cate is exceeded,
even when only briefl y. To continue
operation of the option module in
hazardous areas in such cases,
SAMSON or a person with the
corresponding qualifi cations must
provide eviden that all safety/
protection features within the device
or module are fully effective.
– The specifi cations described in 2. for
the supply unit are not observed.
Operation of the option module must
not be continued in such cases. The
option module must be replaced.
IP 9519-1 EN