Power supply

Operating voltage

AC 24 V ±20 %; DC 24 V ±10 %

Frequency

45…65 Hz

Max. AC-Current consumption

600 mA at AC 24 V

Max. DC-Current consumption

340 mA at DC 24 V

Connection

Peripheral bus

Power distribution

Max. pass through current

3.4 A at AC 24V

3.66 A at DC 24 V

Relay outputs Q1...Q3 (with high inrush capacity)

Relay: type, contact

Monostable, NO contact

Contact ratings

 

   Switching voltage

AC 24…230 V (-20 %, +10 %)

   Nominal current (res. / ind.)

AC 4 A / 1 A (cosφ ≥ 0.6)

   Inrush current

Max. 80 A / max. 100 µs

External overcurrent protection

Fuse slow max. 10 A or

Circuit breaker max. 13 A

Operations

Min. 10,000

   Minimum switching load

30 mA / 19 V respectively 10 mA / 200 V

Connecting Circulator Pumps to relay output

Relay output Q4 (T4)

Relay: type, contact

Monostable, NO contact

Contact rating

 

   Switching voltage

AC 24…230 V (-20 %, +10 %)

   Nominal current (res. / ind.)

AC 4 A / 1 A (cosφ ≥ 0.6)

   Inrush current

Max. 10 A / max. 10 ms

External overcurrent protection

Fuse slow max. 10 A or

Circuit breaker max. 13 A

Operations

Min. 10,000

   Minimum switching load

30 mA / 19 V respectively 10 mA / 200 V

Connecting indicator lamps to relay output

Universal I/Os X1…X8

   Configurable

By software

   Reference potential

Terminals ┴

   Contact voltage

Max. DC 24 V (SELV)

   Over voltage protection

Up to 40 V

Analog inputs (X1…X8)

Ni1000

   Sensor current

1.4 mA

   Resolution

0.1 K

   Accuracy within the range -50…150 °C

0.5 K

Pt1000

   Sensor current

1.8 mA

   Resolution

0.1 K

   Accuracy within the range -50…150 °C

0.5 K

NTC 10k (B25/85 = 3977K)

   Sensor current

140 μA

   Temperature range

Accuracy

Resolution

      -50…-26 °C

1 K

0.2 K

      -25…74 °C

0.5 K

0.1 K

      75…99 °C

1 K

0.3 K

      100…124 °C

3 K

1.0 K

      125…150 °C

6 K

2.5 K

NTC 100k (B25/85 = 3977K)

   Sensor current

140 μA

   Temperature range

Accuracy

Resolution

      -25…-11 °C

3 K

0.2 K

      -10…9 °C

1 K

0.1 K

      10…99 °C

0.5 K

0.1 K

      100…150 °C

1 K

0.2 K

0...2,500 Ω

   Sensor current

1.8 mA

   Resolution

1 Ω

   Accuracy

4 Ω

Connecting a ratiometric sensor to universal I/Os

Connecting NTC to universal I/Os

Analog inputs (X1…X8)

DC 0...10 V input

   Resolution

1 mV

   Accuracy at 0 V

2 mV

   Accuracy at 5 V

25 mV

   Accuracy at 10 V

50 mV

   Input resistance

100 kΩ

DC 0/4…20 mA input

   Resolution

1 μA

   Accuracy at 4 V

25 μA

   Accuracy at 12 V

70 μA

   Accuracy at 20 V

120 μA

   Impedance of DC 0/4…20 mA input

Typ. 450 Ω

Voltage input DC 0…10 V

Current input 4…20 mA

Digital inputs (X1…X8)

0/1 digital signal (binary)

For potential-free contacts

   Sampling voltage / current

DC 24 V / 8 mA

   Contact resistance

Max. 200 Ω (closed)

Min. 50 kΩ (open)

   Delay

10 ms

   Pulse frequency

Max. 30 Hz

Connecting floating contacts to universal I/O

Analog outputs (X1…X8)

DC 0...10 V output

   Resolution

11 mV

   Accuracy at 0 V

66 mV

   Accuracy at 5 V

95 mV

   Accuracy at 10 V

124 mV

   Output current

1 mA (short-circuit-proof)

DC 4…20 mA output

   Resolution

22 μA

   Accuracy at 4 V

150 μA

   Accuracy at 12 V

196 μA

   Accuracy at 20 V

243 μA

Connecting voltage output and current output to universal I/O

Analog outputs Y1...Y2

DC 0…10 V output

   Resolution

11 mV

   Accuracy at 0 V

66 mV

   Accuracy at 5 V

95 mV

   Accuracy at 10 V

124 mV

   Output current

1 mA

Connecting voltage output and offboard relays to analog output

Connection terminals

Optional plugs for IO signals

Phoenix FKCVW 2,5 / x-ST

Phoenix FKCT 2,5 / x-ST

Phoenix MVSTBW 2,5 / x-ST

Solid wire

0.5…2.5 mm²

Stranded wire (twisted and with ferrule)

0.5…1.5 mm²

Cable lengths

In compliance with load, local regulations and installation documents

Peripheral bus

Power supply

Ueff = AC 24 V ±20 %, fmain = 45...65 Hz
or U = DC 24 V ±10 %, no internal fuse

Bus termination selectable

(680 Ω / 120 Ω +1 nF / 680 Ω )

Solid wire

0.2…1.0 mm²

Stranded wire (twisted and with ferrule)

0.2…1.0 mm²

Cable lengths

Max. 30 m

Addressing

DIP switch 1…5

Termination

DIP switch 6

Ambient conditions and protection classification

Operation

IEC 60721-3-3 class 3K5

   Temperature

-40...70 °C

   Humidity

<90 % r.h. (non-condensing)

   Atmospheric pressure

Min. 700 hPa, corresponding to max. 3,000 m above sea level

Transport

IEC 60721-3-2 class 2K3/2K4

   Temperature

-40...70 °C

   Humidity

<95 % r.h. (non-condensing)

   Atmospheric pressure

Min. 260 hPa, corresponding to max. 10,000 m above sea level

Protection

    Degree of protection

IP20 (EN 60529)

   Safety class

Suitable for use in plants with safety class II

Standards, directives and approvals

Product standard

EN 60730-1

Automatic electronic controls for household and similar use.

Electromagnetic compatibility (applications)

For use in residential, commerce, light-industrial and industrial environments.

EU conformity (CE)

CB1T3920xx *)

RCM conformity

CB1T3909en_C1

Listings

UL916, UL873 http://database.ul.com/

CSA Class 4812 http://www.csagroup.org

Environmental compatibility

The product environmental declaration CB1E3920en contains data on environmentally compatible product design and assessments (RoHS compliance, materials composition, packaging, environmental benefit, disposal).

*) The document can be downloaded from http://siemens.com/bt/download.

General Data

Dimensions of controller

108 x 110 x 75 mm

Weight excl. packaging

183.5 g

Base

Plastic, pigeon-blue RAL 5014

Housing

Plastic, light-grey RAL 7035

Status of LEDs

The status of BSP LED is defined as follows:

Status

Meaning

Red flashing at 2 Hz

BSP error or address error

Green on

BSP running

The status of BUS LED is defined as follows:

Status

Meaning

Red on

Communication error

Green on

Communication running

Orange on

Communication running but parameter not successfully configured

DIP switch

The extension module is equipped with DIP switch to communicate with the controller. Switch 1, 2, 3, 4, and 5 are configurable to set the address, while switch 6 serves as peripheral bus termination. If the extension module works as the termination in the network, switch 6 must be set to ON.

The order of bit is from 5 to 1. The lowest bit is 5 while the highest bit is 1. Max. 31 addresses can be configured as follows:

DIP Switch configuration of Extension Module

No.

Schematics

No.

Schematics

No.

Switch 5

No.

Schematics

1

9

17

25

2

10

18

26

3

11

19

27

4

12

20

28

5

13

21

29

6

14

22

30

7

15

23

31

8

16

24

 

 

NOTICE

The same address of extension module must be set respectively in the application program of the controller. 0 cannot be set as the address.