11
USER MANUAL FERNTEL IP4 / IP160
March 2022 www.eaton.com
Up to three buttons are to be connected to the connecting cable leading out of cable inlet (viii), which is connected with
the inputs input 1 – input 3 of the phone. As illustrated below, the buttons are to be connected between one of the inputs
input 1 [1], input 2 [2] or input 3 [3] and the frame terminal [4]. Here voltage VB drives current limited by R
ICL
through the
actuated button. The series-connected transmitting diode of the opto-isolator then transmits the switching state of the
button, galvanically isolated, to the electronics.
The position of the cable inlets can be found in Figure 1 “- Housing top view and position of the wire/cable inlets (i) – (viii)”
on page 8.
2.4.3 Inputs input 1-input 3
VB
+
1
R
IC L
R
IC L
R
IC L
2
3
4
1
3
2
4
1
S1
S2
S3
3
2
Input -1 - 3
KLE viii
22.8 V
DC
≤ VB ≤ 57.0 V
DC
IB ≤ 10.0 mA
DC
R
ICL
= 22 kΩ
The headset must be connected to terminals 1-4 of the terminal strip X1 located in the terminal compartment. In
the process, make sure that the polarity of the microphone is correct. The microphone’s positive connector must be
connected with terminal 3.
The indicated colors are the core colors of the connecting cable of our headset FHF11264304; the ends of the unused
cores (gray and pink) of this connecting cable are to be insulated with a piece of insulating tape or cut off if necessary.
2.4.4 Headset connector for headset
+
1
ge
gn
ws
br
2
3
4
+
-
e.g. headset FHF11264304
Equipment to be switched on/off is to be connected to terminals 5 and 6 of terminal strip X1 located in the terminal
compartment. The make-contact element of the relay onboard photo relay can switch direct current and alternating current
loads in the indicated load range.
2.4.5 Output contact relay onboard
5
6
+/~
-/~
Last
AC:
V
switch
≤ 30 V
AC
/ I
switch
≤ 1.0 A
AC
S
switch
≤ 15 VA
DC:
V
switch
≤ 60 V
DC
/ I
switch
≤ 1.0 A
DC
P
switch
≤ 15 W
Attention!
- The permitted load currents of the output contacts are voltage dependent. Calculate their maximum values as indicated below by
generating the quotient of switching capacity P
switch
and switching voltage V
switch
. Furthermore, the result must not exceed the indicated
maximum value of the switching current I
switch
.
AC: I
LoadMax
= S
switch
/ V
switch
= 15 VA / 24 V = 0.626 A I
LoadMax
≤ I
switchMax!
DC: I
LoadMax
= P
switch
/ V
switch
= 15 W / 48 V = 0.312 A I
LoadMax
≤ I
switchMax!
