KROHNE DW 181-182-183-184 EN - Manual (Page 14)

14 Installation and operating instructions DW 181 - 184
4.3 EEx d version
The MS 12/BRX (EEx d) switch features a flameproof aluminium enclosure. The limit switches are
type K1 and K2 bi-stable reed switches without changeovers or KV1 relays and are supplied
without a local display.
Approval
EEx d IIC T6…T1
INERIS certificate 03 ATEX 0045X
Technical data
MS 12/BRX switch
Switches
NC*** and NO****
Switch rating
K1, K2
(reed switch)
KV1
(relay)
14 VA (350 V AC;
0,25 mA
2000 VA (250 V AC;
8 A
Max. switching
capacity dissipated
by Ex d housing 20 VA; 1.5 A;
380 V AC
Ambient
temperature -40…+80°C or
-40…+175°F
Process
temperature max. 150°C or
max. 300°F*
Protection category
to EN 60529/NEMA
250 IP 65 / NEMA 6 when
T195…80°C or
T380…175°F*,**
Screw connection M20 x 1.5 without
cable entry fitting***
* T80…T195°C depending on the ambient
temperature and process temperature (see
section 7: Technical data).
**Maximum surface temperature of device.
***Optional: M25x1.5 or NPT ¾ threads