Eaton Ex-Lite N Instruction Sheet

RTK DB5
October 2016
54 INS DB5 Rev 9
Installation diagram
Notes:
1. Any shunt zener diode safety barrier or galvanic isolator, certified by an EEC approved body to [EEx ia] IIC, having
the following maximum output parameters:
DB5-24:
Uo = 28V, Io = 147mA, Po = 0.81W
DB5-12:
Uo = 15.7V, Io = 150mA, Po = 0.56W
2. Other barriers having lower values than these are permitted.
3. In any safety barrier used the output current must be limited by a resistor “R” such that:
Io = Uo / R
4. The capacitance and inductance of the hazardous area cable must not exceed the values quoted in the certificate
for the particular barrier/isolator used. See table 1. If the inductance to resistance ratio (L/R) of the cable is higher
than the ratio of the barrier/isolator, the maximum length that can be connected to the interface has to be
calculated.
5. The installation must comply with the appropriate national installation requirements e.g. in the U.K.
BSEN 60079-14:1997.
6. The circuit in the hazardous area must be capable of withstanding 500V RMS to earth or frame for one minute
when using zener diode safety barriers.
Cable parameters
Group Capacitance μF Inductance μH L/R ratio μH/Ω
Typical 28V / 300Ω zener barrier
IIC 0.083 4.2 55
IIB 0.65 12.6 165
IIA 2.15 33.6 440
Table 1
Sounder type DB5 to
Certificate
BAS00ATEX1259
Ex II 1 G
EEx ia IIC T4
Hazardous area Non-hazardous area
One zener diode safety barrier
See notes 1-3
Or galvanic isolation interface
See note 4-6
Non-hazardous area apparatus
which is unspecified except that it
must not be supplied from nor
contain under normal or abnormal
conditions, a source or potential
with respect to earth in excess of
250VAC RMS or 250VDC.

Eaton Ex-Lite N Specifications

General

Brand	Eaton
Model	Ex-Lite N
Category	Lighting Equipment
Language	English