KROHNE H250 M9 Safet V1 EN - Manual (Page 11)

ANNEX
8
11
H250
www.krohne.com 02/2012 - 4000656701 MA H250-M9 SIL R02
Annex
8.1 Annex 1
Constricted Description Code for H250 Functional Safety Equipment acc. to EN 61508
The description code for H250 consists of the following elements 1
1 positions which are not needed are omitted (no blank positions)
The variable-area flowmeter H250/M9 (SIL) can be equipped with a maximum of two electronic
limit switches.
The limit switch function with a slot-type indicator which is operated inductively through the
semicircular metal vane belonging to the measuring pointer.
The correct ordering text for switches with different contact types and the fitting isolating
switching amplifier are found in the right column of the two tables "option 1" and "option 2" (see
next page).
1 Device type H250 - standard version
2 Materials / versions
RR - Stainless Steel
HC - Hastelloy
®
Ti - Titanium
3 Heating jacket version
B - with heating jacket
4 Series of indicators
M9 - Indicator M9 standard indicator
M9S - Indicator with added impact and corrosion protection
M9R - Indicator in Stainless Steel housing
5 Position not needed for SIL 2 applications
6 Position not needed for SIL 2 applications
7 Position not needed for SIL 2 applications
8 Limit switch
K1 - One limit switch
K2 - Two limit switches
S1 - One SIL2 Limit switch acc. to IEC 61508
S2 - Two SIL2 Limit switches acc. to IEC 61508
9 Explosion protection
Ex - Explosion-protected equipment
10 SIL
SK - SIL2 compliance of limit switches acc. to IEC 61508
MA_H250_M9_SIL2_R02_en_656701_PRT.book Page 11 Thursday, March 1, 2012 10:26 AM