Siemens The PROBE Manuel D'instructions page 6

Intrinsically Safe Model
FM (reference drawing 1-8600016Z-DX-A)
Note: Reference drawing 1-8600016Z-DX-A is available on the product page of our
website at www.siemens.com/theprobe. Go to More Info / Installation drawings and
scroll to Connection Drawings.
Under the entity evaluation concept, The Probe has the following characteristics :
Vmax = 30 V DC
Ci = 0
Definition :
The Entity Concept allows interconnection of intrinsically safe apparatus to associated apparatus
not specifically examined in such combination. The criteria for interconnection is that the voltage
and current which intrinsically safe apparatus can receive and remain intrinsically safe, considering
faults, must be equal or greater than the voltage (Voc or Vt) and current (Isc or It) levels which can
be delivered by the associated apparatus, considering faults and applicable factors. In addition, the
maximum unprotected capacitance (Ci) and Inductance (Li) of the intrinsically safe apparatus,
including interconnecting wiring, must be equal to or less than the capacitance and inductance
which can be safely connected to associated apparatus.
FM / CSA (reference drawing 1-8600016Z-DX-A)
Note: Reference drawing 1-8600016Z-DX-A is available on the product page of our
website at www.siemens.com/theprobe. Go to More Info / Installation drawings and
scroll to Connection Drawings.
Approved dust tight and water tight conduit seals are required for Class II, Div. 1, Gr. E, F, G, and
outdoor Type 4 / NEMA 4X / IP65 locations.
The maximum voltage of the non-intrinsically safe apparatus must not exceed 250 V rms.
Use only intrinsically safe barriers as listed.
Passive
24 V DC
supply
Page 4
Imax = 200 mA dc
Safe Area
load
4 to 20
mA
The Probe – INSTRUCTION MANUAL
Li = 0
Hazardous Area
4 to 20 mA
see terminal
connection
table
7ML19985GC62