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Operating Instructions
GSM-2 Ei
The GSM-2 Ei GPRS modem enables pressure measure-
ments in areas exposed to gas explosion hazards when
used in conjunction with an intrinsically safe pressure
transmitter.
System description
The system description document pursuant to
EN 60079-25 comprises:
· Block diagram 81902.11
„GSM-2 Ei system description”
· Standard GSM-2 operating instructions
(www.keller-druck.com)
· Product information on INTRINSPAK safety barriers
· Pressure transmitter manual
· These GSM-2 Ei operating instructions
Components
The GSM-2 Ei has a stable metal housing (GSM-2 Ei
Box) and comprises a battery-powered GSM-2 with ad-
ditional integrated safety barriers. It can be connected to
one of the following KELLER pressure transmitters with an
RS485 interface:
· Series 33 X Ei, 35 X Ei, 36 XW Ei, PD-33 X Ei or PD-
39 X Ei pressure transmitter with a three-wire voltage
output compliant with EC type examination certificate
KEMA 04 ATEX 1081 X for use in zones 0, 1 or 2, or
· Series 41 X Ei or 46 X Ei pressure transmitter with a
3-wire voltage output compliant with EC type examination
certificate PTB 06 ATEX 2011 for use as a partition wall
device between zones 0 and 1, or for zone 1 or 2
In contrast to a standard GSM-2, only one transmitter can
be connected.
The GSM-2 Ei has 2 integrated INTRINSPAK safety bar-
riers manufactured by R. Stahl:
· 9001/01-168-075-101 for supplying the transmitter and
· 9001/01-120-024-001 for the RS485 interface
Installation location
Pressure transmitters can be installed in the explosive
atmosphere in accordance with their marking. The GSM-2
Ei Box must be installed outside of the explosive area.
Block diagram
See diagram 81902.11 „GSM-2 Ei system description”.
Summary of Contents for GSM-2 Ei
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