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Searchline Excel Plus & Edge™ – Safety Manual
7. Power supplied to the Searchline Excel Plus & Edge or to the 420 mA loop of the product shall be of an isolating type
(galvanic isolation from mains, providing basic insulation) but does not need to be a Class II (SELV) power supply.
At no time should voltages exceeding 60V DC be provided to the product (with the exception of the relay contact
connections).
8. Searchline Excel Plus & Edge contains relays that may be used to perform executive actions when an alarm is triggered.
Ensure that such systems are identified and inhibited / disconnected before carrying out any proof testing, bump
testing, or sensor calibrations.
9. For SIL 2 applications, users must use the mA output to determine both alarm and fault conditions. Configurations for
SIL 2 alarm relay outputs are described in Point 11d). Relay outputs can be used simultaneously for SIL 1 or non-safety
applications.
10. If relay outputs are used for safety purposes, the following directions must be adhered to:
a) The relay contacts must be protected with a fuse rated at a maximum of 3 A.
b) Only resistive loads should be connected to the relay contacts.
c) The fault relay output must be energised under normal conditions.
d) It is possible to realise a SIL 2 relay output for alarm conditions. If such a configuration is required the suspected
and confirmed alarm relay outputs must be wired as shown below. Configuration 1 should be used when
an “open contact” represents the activation of the safety function whereas Configuration 2 should be used
when a “closed contact” represents the activation of the safety function. Configuration 1 requires the addition of
a protective fuse rated at a maximum of 3 A to protect the relay contacts from adverse events which may cause
contact welding.
3.3 Environmental Conditions
The environmental conditions that the Searchline Excel Plus & Edge is designed to operate within are listed below:
Voltage: 18 to 32V DC
Temperature: 55°C to +75°C
Humidity: 0100% RH Condensing
Altitude: 01500m
EMC: EN 50270, IEC/EN 6100064; Radio Equipment Directive 2014/53/EU
IPProtection: IP 66/67 (Type 4X in accordance with NEMA 250)
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