26
Device Description
WAGO-I/O-SYSTEM 750
750-652 Serial Interface RS-232 / RS-485
Manual
Version 1.4.0
3.6.4
Interface
Table 12: Technical Data ‒ Interface
Number of interfaces
1
Input resistance of the receiver
RS-485/RS-422
24 kΩ (1/2 Unit Load)
Defined receiver state with short-
circuited or isolated inputs
(true fail-safe)
Isolation
500 V system/supply
3.6.5
Connection Type
Table 13: Technical Data – Field Wiring
Wire connection
CAGE CLAMP
®
Cross section
0.08 mm² … 2.5 mm², AWG 28 … 14
Stripped lengths
8 mm … 9 mm / 0.33 in
Table 14: Technical Data – Power Jumper Contacts
Power jumper contacts
Blade/spring contact, self-cleaning
Voltage drop at I
max.
< 1 V/64 modules
Table 15: Technical Data – Data Contacts
Data contacts
Slide contact, hard gold plated, self-
cleaning
3.6.6
Climatic Environmental Conditions
Table 16: Technical Data – Climatic Environmental Conditions
Operating temperature range
0 °C … 55 °C
Operating temperature range for
components with extended
temperature range (750-xxx/025-xxx)
−20 °C … +60 °C
Storage temperature range
−25 °C … +85 °C
Storage temperature range for
components with extended
temperature range (750-xxx/025-xxx)
−40 °C … +85 °C
Relative humidity
Max. 5 % … 95 % without condensation
Resistance to harmful substances
Acc. to IEC 60068-2-42 and
IEC 60068-2-43
Maximum pollutant concentration at
relative humidity < 75 %
SO
2
≤
25 ppm
H
2
S
≤
10 ppm
Special conditions
Ensure that additional measures for
components are taken, which are used in
an environment involving:
– dust, caustic vapors or gases
– ionizing radiation
