Terminal

Symbol

Description

Module

Channel

1, 2

2 x RJ45 interface for Ethernet with switch

 

 

3, 4

KNX

PXC4.E16-2: KNX PL-Link

 

 

5, 6

≃, ⏊

Operating voltage AC 24 V or DC 24 V

 

 

7

Functional ground (must be connected on the installation side with the building grounding system (PE)).

 

 

9 to 17
20 to 28

Ux

Universal inputs / outputs 1…12

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
(If PXC4.E16-2 is powered by DC voltage, then the field device supply on terminal V≃ is DC voltage, too)

 

 

68, 69, 70

COM

PXC4.E16-2: Interface EIA-485 (M-bus, Modbus RTU)

 

 

Term

on, off

PXC4.E16-2: Switch for bus termination

 

 

Polar

on, off

Switch for polarization

 

 

75 to 86

DOx

Relay outputs 1…4

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 300 m (984 ft) with shielding

Examples of connection diagrams for universal inputs/outputs

Digital inputs


S1


Feedback contact (NO)


S2


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.

Analog inputs


B1


Temperature sensor LG-Ni 1000


B2


Temperature sensor, general


B3


Resistance transmitter


B4


Active sensor with 0…10 V output powered by the automation station


B5


Active sensor with 0…10 V output with external power
Do NOT ground external power (ground loops)


B6


Active sensors 0 ... 20 mA or 4 ... 20 mA (2-wire)
On U1, U2, U7, U8 only

Analog outputs


Y1


Device with input DC 0...10 V


Y2


General device with control input DC 0...10 V powered by the automation station


Y3


General device with control input DC 0...10 V
Do NOT ground external power (ground loops)