Operating Instructions
english
12
I.S. Relay Module Type 9172
When used in Zone 2 or 22, intrinsically safe devices of Zones 1, 0, 21 and 20 may be
connected to the intrinsically safe contact or coil circuits.
The I.S. relay modules may only be connected which will not be subjected to voltages
higher than AC 253 V (50 Hz).
When used in Zone 2 and Zone 22 the maximum voltage at the contacts may not exceed
125 V AC/DC
Please ensure that the devices which are connected to the contacts of the relay module
are compliant to surge category III / II / I acc. to IEC 60664-1.
The safe maximum values of the connected field device(s) must correspond to the values
of the data sheet or the EC-type examination certificate.
The safety guidelines in these operating instructions
Any damage can invalidate the explosion protection.
Use the device
in accordance with the regulations
and for its intended purpose only (see
“Function”).
!
Warning
With incorrect or unauthorized use or non-compliance with these instructions the
intended protection can be impaired, the warranty provision is invalidate on our part in
these cases.
o
No changes to the devices or components impairing their explosion protection are
permitted.
o
Furthermore, the device may only be operated if it is undamaged, dry and clean.
Should there be any question about the correct handling of the module, please contact R.
STAHL Schaltgeräte GmbH, Am Bahnhof 30, 74638 Waldenburg, Germany, telephone
+49-7942-943-0, or contact one of our offices or representatives see
4 Conformity to standards
The information about the conformity to standards can be found in the manufacturer’s
declaration of conformity in the appendix of this document.
The current EC-Type Examination Certificate can be downloaded from the Internet
5 Function
The I.S. relay modules are used for the galvanic isolation of intrinsically safe and none
intrinsically safe circuits or the galvanic isolation of two intrinsically safe circuits. Depending
on the version either the control circuit and/or the contact output is operated via an
intrinsically safe circuit.
