JUMO Ex-i, Safety Manual

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1 Introduction
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1.2 Description
JUMO Ex-i isolating switch amplifier ensures reliable, galvanic isolation and safe transfer of switch sig-
nals in a wide range of applications.
The intrinsically safe isolating switch amplifier is also suitable for use in Ex areas. It can be mounted in
Ex zone 2 and used with a sensor in zone 0.
The JUMO Ex-i isolating switching amplifier is ideal for JUMO NESOS float switches with 2 switch con-
tacts and also supports NAMUR proximity sensors. In addition, it features an extended ambient tempera-
ture range from -40 to +60 °C. The two-channel version eliminates the need for a second isolating switch
amplifier so that it saves costs as well as space in the control cabinet.
1.3 Block diagram
2 outputs
Relay
(1 changeover contact per input)
Output
AC/DC 24 to 230 V
-20 to +10 %, 50 to 60 Hz
Power supply
2 inputs
Proximity sensors
(acc. to EN 60947-5-6, NAMUR)
Unconnected contacts or
contacts with resistance circuit
Input
Ex-i Isolating Switch
Amplifier