8
Installation GRS1020/1120/1030/1130
Release 04 01/2020
Requirements for connecting the supply voltage
Before connecting the supply voltage,
always
verify that the requirements
listed are complied with.
Prerequisites:
All
of the following requirements are complied with:
The supply voltage corresponds to the voltage specified on the type plate of the device.
The power supply conforms to overvoltage category I or II.
The power supply has an easily accessible disconnecting device (for example a switch or
a plug). This disconnecting device is clearly identified. So in the case of an emergency, it is
clear which disconnecting device belongs to which power supply cable.
The ground screw on the back of the device is connected to the protective conductor.
The cross-section of the ground conductor is the same size as or bigger than the cross-
section of the power supply cables.
The following requirements apply alternatively:
Relevant when the device is supplied via 1 voltage input:
Alternative 1
The power supply complies with the requirements for a limited power source
(LPS) as per EN 60950-1.
Alternative 2
Relevant for North America:
The power supply complies with the requirements according to NEC Class 2.
Alternative 3
All
of the following requirements are complied with:
The power supply complies with the requirements for a safety extra-low
voltage (SELV) as per IEC/EN 60950-1.
Supply with DC voltage:
The wire diameter of the power supply cable is at least 1 mm² (North
America: AWG16) on the supply voltage input.
A fuse suitable for DC voltage is located in the plus conductor of the power
supply.
The minus conductor is on ground potential. Otherwise, a fuse is also
located in the minus conductor.
Regarding the properties of this fuse:
See “Technical data” on page 60.
Supply with AC voltage:
The wire diameter of the power supply cable is at least 0.75 mm² (North
America: AWG18) on the supply voltage input.
A fuse is located in the outer conductor of the power supply.
The neutral conductor is on ground potential at both voltage inputs.
Otherwise, a fuse is also located in the neutral conductor.
Regarding the properties of this fuse:
See “Technical data” on page 60.
Relevant when the device is supplied via 2 voltage inputs:
Alternative 1
The
total
voltage supply meets the requirements for a limited power source
(LPS) as per EN 60950-1.
Alternative 2
Relevant for North America:
The
total
voltage supply complies with the requirements as per NEC Class 2.
Summary of Contents for HIRSCHMANN GREYHOUND GRM Series
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