Data Sheet for Product

Siemens Schweiz AG A6V11937668_en--_g

Smart Infrastructure 2022-02-18

Connection terminals

65 66 67 68 69 70

3 4

5 6 7

8 9

Terminal Symbol Description Module Channel

3, 4 KNX PXC4.M16: KNX PL-Link (for future use)

5, 6 24 V ~, ⏊ Operating voltage AC 24 V

7 Functional ground (must be connected on the installation

side with the building grounding system (PE).

8 to 29 Ux Universal inputs/outputs 61 1…12

⏊ Measuring ground for Ux

8, 19 V+ DC 24V power for field devices 2.4W / 100mA

18, 29 V~ AC 24V power for field devices 48VA / 2A

65, 66, 67 MSTP PXC4.M16: Interface EIA-485 (BACnet MS/TP)

68, 69, 70 COM

MSTP

PXC4.M16: Interface EIA-485 (Modbus RTU)

PXC4.M16S: Interface EIA-485 (BACnet MS/TP)

Term on, off Switch for bus connection

Polar on, off Switch for polarization

75 to 86 DOx Relay outputs 11 1…4

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

Feedback contact (NO)

Feedback contact (NC)

Count inputs: 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.