User's Manual
G7 EXOTECHNICAL USER MANUAL || 27
DEFINITIONS
Low-side switch
A low-side switch completes the circuit on the ground side. It is
intended to sink power rather than provide power.
Ui – Maximum input voltage
The maximum voltage (peak a.c. or d.c.) that can be applied to the
connection facilities of apparatus without invalidating the type of protection.
Ii – Maximum input current
The maximum current (peak a.c. or d.c.) that can be applied to the
connection facilities of apparatus without invalidating the type of protection.
Pi – Maximum input power
The maximum power that can be applied to the connection facilities of
apparatus without invalidating the type of protection.
Ci – Maximum internal capacitance
The maximum equivalent internal capacitance of the apparatus which
is considered as appearing across the connection facilities.
Li – Maximum internal inductance
The maximum equivalent internal inductance of the apparatus which is
considered as appearing at the connection facilities.
Uo – Maximum output voltage
The maximum voltage (peak a.c. or d.c.) that can appear at the connection
facilities of the apparatus at any applied voltage up to the maximum voltage.
Io – Maximum output current
The maximum current (peak a.c. or d.c.) in apparatus that can be taken from
the connection facilities of the apparatus.
Po – Maximum output power
The maximum electrical power that can be taken from the apparatus.
Co – Maximum external capacitance
The maximum capacitance that can be connected to the connection
facilities of the apparatus without invalidating the type of protection.
Lo – Maximum external inductance
The maximum value of inductance that can be connected to the connection
facilities of the apparatus without invalidating the type of protection.
Lo/Ro – Maximum external inductance to resistance ratio
Maximum value of ratio of inductance to resistance that can be connected
to the external connection facilities of the electrical apparatus without
invalidating intrinsic safety.
Interface port B
Interface port A
Power port
10 ELECTRICAL PORTS
10.1 CAUTIONS AND DEFINITIONS
CAUTIONS
Ordinary Locations
When used in a non-Hazardous (Classied) Location cables attached
to the power port and Pins 1 and 2 of the A/B interface ports must
be supplied by a Class 2 circuit, a limited energy circuit or a limited
power source (LPS) as per IEC 61010-1, IEC 60950-1, or an equivalent
IEC standard. The output should not exceed any of the applicable input
entity parameters.
Follow local electrical codes
The wiring method used to install EXO’s electrical port accessories should
be in accordance to local electrical code. Installations are subject to
acceptance by the authority having jurisdiction.
Barriers required
A barrier is required for each interface port when EXO is in a Class
I, Division 1, Groups A,B,C,D location or Class I, Zone 0/1, Group IIC
location. See diagram 10.3.6 for more information.
Intrinsic safety warning
Install EXO interface port accessories as shown in the electrical
diagrams in sections 10.2 and 10.3 to ensure intrinsic safety.