Samson 3731-3 Mounting And Operating Instructions page 37

Connection to conform with the type of protection Ex i (EN 60079-11):
For connection to a certified, external instrinsically safe circuit, the terminal compartment of
the positioner may be opened within the hazardous area.
Only the terminal compartment is to be opened within the hazardous area to connect it to a
certified instrinsically safe circuit.
Positioners that are connected to non-intrinsically safe circuits are no longer permitted to
be used as instrinsically safe equipment.
The IP rating of the cable, cable entries and blanking plugs must be the same as the
positioner's degree of protection.
Table 6 · Accessories
Cable gland M20 x 1.5; EEx e, black plastic
Blanking plugs; EEx de; stainless steel
(approvals: CENELEC, CSA, GOST, IECEx)
Cable entry for unarmored cables; EEx e, EEx d, EEx tD A21
(approvals: CENELEC, IECEx)
Connections
Order no.
8808-0178
M20 x 1.5 8323-1203
½ NPT 8323-1204
M20 x 1.5 8808-0200
½ NPT 8808-2010
EB 8387-3 EN
37