MEDC Ex ResistTel - Manual (Page 14)

14
Intrinsically safe keypad connection
An intrinsically safe, 14-pole ribbon cable with plug bush (18) comes out
of the compound. Prior to screwing the device parts together, connect
this plug bush with the 14-pole pin contact strip in the housing cover.
Explosion protection – characteristic data
1. Non-intrinsically safe electrical circuits
1.1 Telephone network
(Terminals A / B No.: 13 – 14)
Maximum input voltage U
m
(ringing voltage) AC 90 V
Admissible frequency range 16...54 Hz
or
Maximum input voltage U
m
(supply voltage) DC 66 V
Maximum rated input current 100 mA
Maximum input short circuit current I
K
35 A
(At the input of this device there is a melting fuse
with a breaking capacity of 35 A)
1.2 External secondary ringer:
For connection with passive consumers only
(Terminals Bell shunt1 / Bell shunt No.: 15 –16)
Maximum ringing voltage
AC 90 V
Frequency range 16...54 Hz
or
Maximum supply voltage
DC 66 V
2. Intrinsically safe electrical circuits
2.1 Headphones accessory (microphone)
(Terminal pair HSM No.: 5 – 6)
Maximum
output voltage U
o
17 V
Maximum output current I
o
90 mA
Maximum output power P
o
80 mW
Maximum external capacitance C
o
375 nF
Maximum external inductivity L
o
1 mH
2.2 Headphones accessory (receiver inset) or second earpiece
(Terminal pair HSR No.: 7 – 8)
Maximum
output voltage U
o
17 V
Maximum output current I
o
110 mA
Maximum output power P
o
190 mW
Maximum external capacitance C
o
375 nF
Maximum external inductivity L
o
1.2 mH