Siemens Transmitters for gage pressure for the paper industry, Device front view, Sitrans P DS

© Siemens AG 2008

SITRANS P measuring instruments for pressure

Transmitters for gage pressure for the paper industry

SITRANS P300 and DS III series

with PMC connection – Technical description

			SITRANS P300
	■Design
			The device comprises:
		SITRANS P, DS III series
			• Electronics
			• Housing
2
			• Measuring cell

Device front view, SITRANS P DS III

The transmitter comprises a range of different components, de- pending on the order specifications. The various options are listed in the ordering information. The components described below are the same for all transmitters.

The rating plate (3, Figure "Front view") with the Order No. is lo- cated on the side of the housing. The specified number together with the ordering information provide details on the optional de- sign details and on the possible measuring range (physical properties of built-in sensor element).

The approval label is located on the opposite side.

The housing is made of die-cast aluminium or stainless steel pre- cision casting. A round cover is screwed on at the front and rear of the housing. The front cover (6) can be fitted with a viewing pane so that the measured values can be read directly on the digital display. The inlet (4) for the electrical connection is lo- cated either on the left or right side. The unused opening on the opposite side is sealed by a blanking plug. The protective earth connection is located on the rear of the housing.

The electrical connections for the power supply and screen are accessible by unscrewing the rear cover. The bottom part of the housing contains the measuring cell with process connection

(1). The measuring cell is prevented from rotating by a locking screw (8). As the result of this modular design, the measuring cell and the electronics can be replaced separately from each other. The set parameter data are retained.

At the top of the housing is a plastic cover (5), which hides the input keys.

Perspective view of the SITRANS P300

The housing has a screwable cover (3), with or without an in- spection window depending on the version. The electrical termi- nal housing, the buttons for operation of the device and, de- pending on the version, the digital display are located under this cover. The connections for the auxiliary power UH and the shield are in the terminal housing. The cable gland is on the side of the housing. The measuring cell with the process connection (5) is located on the underside of the housing. Depending on the ver- sion of the device, the measuring cell with the process connec- tion may differ from the one shown in the diagram.

2/48

Siemens FI 01 · 2009