Amplified Phone User Manual
PHÖNIX Messtechnik GmbH, Salzschlirferstr. 13, D-60386 Frankfurt/M., Germany, Tel: +49/69/416742 -20, Fax: -29 
14 
7 Disposal 
The customer/enduser is obliged to take care for the disposal within the legal regulations. 
8 Trouble shooting 
Failure Problems Correction 
no function  wrong wiring, fuses, current supply  check it 
no bistable behaviour  wrong mounting of the housing  rise distance 
the switch is always closed 
(740.0060) 
power switch: low current 
Mini-switch: supply voltage > 24V 
use it as a mini-switch 
remove resistor R1 
the switch opens spontane-
ously (miniswitch) 
load is too high 
temperature is too high 
use an isolating switch amplifier 
use a heat protection plate 
9 Technical Data 
General Data  Design Data 
Hysteresis ca. [mm] 
Cable gland downwards
IP65 
Alu/Makrolon
with strap retainers
(Accesories s. page 2)
Makr.: 82x80x55/0,15 kg
Alu:  75x80x57/0,3 kg
Gauge-Type on basic pipe on heating jacket
710.104/2XX
710.100
710.110...160
6
10
15
15
20
25
Operating mode
M
a
k
r
.
A
l
u
M
a
k
r
.
A
l
u
max. temperature
  of pipe
max. temp.
of housing
150 °C *)
at amb.Temp.85 °C
70 °C
Power switch
(Solid state
Triac-relay)
Small signal
switch
(Reed)
400 °C *)
at amb.Temp.55 °C
90 °C
150 °C *)
at amb.Temp.120 °C
500 °C *)
at amb.Temp.70 °C
120 °C
120 °C
*)Insulate between housing and pipe above
150 °C in pipe
Electrical data power switch  Electrical data miniswitch 
Operating voltage nominal: 
Operating voltage limit: 
Load current nominal: 
OFF-current (230 V~) 
max. power limit: 
24 V~ to 230V~ 
250 V~ 
24 mA~ to 2,5 A~ 
6 mA~ 
550 VA 
Operating voltage limit: 
Operating current limit: 
Rupturing capacity UxI
max
: 
400 V= / 230 V~ 
0,5 mA 
5 W 
-
 1)
 Take into account that none of the three parameters U
max
, I
max
, P
max
 may be exceeded! 
(
>260 °C for 740.0065NA) 










