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Connection terminals
Terminal
1, 2
3, 4
5, 6
7
8 to 29
8, 19
18, 29
68, 69, 70 COM
Term
Polar
75 to 86
Wiring lines for field devices
Wiring length max. 300 m (1,000 ft), CU wire or CU strand.
Cross-section depending on the signal
30 m (100 ft) applies for signal types AI NTC10K and AI NTC100K
or 80 m (260 ft) with shielding
Examples of connection diagrams for universal inputs/outputs
Digital inputs
Count inputs:
Siemens Schweiz AG
Smart Infrastructure
Symbol
Description
2 x RJ45 interface for Ethernet with switch
KNX
PXC4.E16: KNX PL-Link (for future use)
24 V ~,
Operating voltage AC 24 V
⏊
Functional ground (must be connected on the installation side with
the building grounding system (PE).
Ux
Universal inputs/outputs
⏊
Measuring ground for Ux
V+
DC 24 V power for field devices 2.4 W / <100 mA
V~
AC 24 V power for field devices 48 VA / 2 A
PXC4.E16: Interface EIA-485 (Modbus RTU)
on, off
PXC4.E16: Switch for bus termination
on, off
Switch for polarization
DOx
Relay outputs
Ux
Ux
Counter inputs, that count faster than 1 Hz and are laid with more than 10 meters using analog inputs in
the same cable duct, must be shielded.
3 4
5 6 7
68 69 70
S1
Feedback contact (NO)
S2
Feedback contact (NC)
8 9
Module
61
11
A6V11646018_en--_e
Channel
1...12
1...4
13
2021-06-11
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