KROHNE BM 26 A EN - Manual (Page 41)

Installation and Operating Instructions BM 26 A 41
7.3 Technical data: limit switches
Limit switch
MS 20/STD MS 20/EXI
Max. switching capacity 30 VA 0.5 A
0.5 A, 230 V AC
Ambient temperature –20°C … 120°C
–4°F … 250°F -20°C … +80°C
-4°F … 175°F (T6) or
-20°C … +95°C
-4°F … 200°F (T5)
Process temperature < 250°C / < 480°F < 250°C / < 480°F
Protection category IP 65 IP 65
to EN 60529 NEMA 4/4X NEMA 4/4X
Cable entry PG 9 PG 9
Max. safety values - Ui= ****
Ii = 100 mA
Ci= 0 nF, Li= 0 µH
Housing material polycarbonate polycarbonate
Hysteresis 0 0
Weight 85 g / 0.2 lb 85 g / 0.2 lb
Limit switch
MS 15/STD MS 15/EXI MS 15/EXD MS15/*/NAMUR
max. switching capacity 20 VA 1.5 A According to
LC (low power cut-out) 1.5 A, 250 V AC
20 VA
1.5 A
250 V CA*****
NAMUR 19234
max. switching capacity
HC (high power cut-out) Max. 100 VA
Min. 3VA
1.5 A
250 VA - Min. 3 VA
1.5 A
250 V CA***** *
Ambient temperature –20°C … 120°C *** *** *
–4°F … 250°F
Process temperature HT
(high) < 250°C
< 480°F *** *** *
Process temperature BT
(low) < 300°C
< 570°F *** *** *
Protection category IP 65 IP 65 IP 65 *
to EN 60529 NEMA 4/4X NEMA 4/4X NEMA 4/4X
Cable entry PC
AL PG 13.5
M 20 x 1.5** PG 13.5
M 20 x 1.5** -
M 20 x 1.5** *
Max. safety values - Ui=****
Ii =500 mA
Ci=0nF,Li= 0µH
***** *. For Exi :
Ui=24V, Ii = ****,
Ci=0nF, Li= 0µF
Housing material BT
HT Polycarbonate
Aluminium Polycarbonate
Aluminium
Aluminium *
Hysteresis 0 0 0 *
Weight PC
AL 130 g / 0.3 lb
1200 g / 2.6 lb 130 g / 0.3 lb
1200 g / 2.6 lb -
1200 g / 2.6 lb *
* For these characteristics refer to the other columns in the table above for STD (i.e. non-Ex),
EXI or EXD switches – depending on which official approval has been selected.
** standard thread (fitting not supplied). Optional: M25 x 1.5 or NPT ¾.
*** Refer to table in “ATEX applications: special conditions for safe use”, section 7.1
**** The value is not defined, however the power supply must be intrinsically-safe
***** U
max
= 380 V CA, I
max
= 1,5 A, P
max
= 20 VA