Data Sheet for Product

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Building Technologies Data sheet KNX bus CE1N3127en

HVAC Products 18.02.2008

During commissioning, set the zone addresses as per the plant functions.

Set the zone addresses in Synco 700 devices via operator units RMZ790 and RMZ791,

and locally via QAX910 for the central apartment unit (Synco living).

The service tool OCI700.1 (part of the ACS7… software package) allows for efficient

zone addressing in complex plants featuring many Synco devices.

You can only assign the group addresses to the group objects (= KNX S-mode data

points) via the ETS3 tool. You can order the ETS3 tool from the KNX Association at

www.knx.org/

See document Y3110 for more information on the KNX S-mode data points.

An individual device name (e.g. plant designation) consisting of max. 21 characters can

be assigned to the Synco devices.

The device name is written to the Synco 700 devices via the operator units RMZ790

and RMZ791 as well as the service tool OCI700.1.

For the central apartment unit (Synco living), write the device name locally at the

QAX910 and via the service tool OCI700.1 to the QAX910.

Technical data

Transmission medium (bus cable) TP (twisted pair)

Baud rate 9.6 kbps

(fixed for TP)

Bus line polarity CE+, CE–

(not interchangeable)

Bus terminating resistor Not required

Communication signal

The communication signal (information) is transferred symmetrically, i.e., as voltage difference between

the two bus lines (and not as a voltage difference to the earthing potential). The sign preceding the

voltage between CE+ and CE– determines signal values 0 and 1.

Cable type 2-wire, stranded (

one wire pair)

or 2x2-wire, stranded

or Spiral quad

Wire diameter Min. 0.8 mm, max. 1.0 mm

Wave resistance (ideal value) 120 Ω at 100 kHz

Line resistance 20 Ω/km to max. 75 Ω/km

Capacity, bus line to bus line Max. 100 pF/m at 800 Hz

Greater values require a proportional

shortage of the perm. cable lengths.

Screens Not required

Synco devices do not have a

connection for bus cable screens

Bus power supply via Synco device with DPSU DC 30 V, 25 mA

Zone addresses,

LTE mode

Group addresses,

S-mode

Device name

KNX bus

KNX bus cable

Bus power supply

Subject to change