Mechanical design
Basic design
The central communication unit consists of the housing lower section with printed circuit
boards and connection terminals. The upper housing section contains the printed circuit
boards. The LEDs, operating buttons, interfaces, and slots for the CF cards (compact
flash memory cards) are integrated in the upper housing section. These elements and
the connection terminals are labeled on the front of the housing. The shape and dimen-
sions of the housing sections conform to DIN 43880 (size 2).
OZW775
OZW775
1
2
10 11 12 13
14 15 16 17 18
19
20 21
22
23
24
25 26
27
3
4
5
6
7
8 9
56
63Z
01
11 12 21 22
Q
18 19 20 21
Q Q Q
Q Q Q Q
XX:XX:XX:XX:XX:XX
XXXXXXXXXXXX HEX
040601A001001
OZW775
Position
Labeling
Element
1
PC
USB interface
2
D1...D8 M
Connection terminal digital inputs
(M = ground)
3
X1...X8 M
Connection terminals universal inputs (M = ground)
4
Upper housing section
5
Modem
RS-232 interface
6
KNX
LED (green/red) Bus voltage, data exchange via KNX (green) / unit in addressing mode (red)
7
CE- CE+
KNX (Konnex) connection terminals
8
Ethernet
Ethernet plug RJ45 on Ethernet card OZZ7E5 (order card separately)
9
XX:XX:XX:XX:XX:XX
MAC address (Media Access Control address, 48 bits)
10 Run
LED (green) Operating voltage applied (lit), communicating with ACS (flashing)
11 Local
LED (red)
Central unit faults or faults at fault inputs, or "Hours run for service reached"
12 System
LED (red)
Device faults in the KNX network
13 CF
cards
LED (green) CF card integrated (lit), CF card being integrated or removed (flashing)
14
G G0
Connection terminals for AC 24 V operating voltage
15 Config
Button
Integrate or remove CF card
16 Ack
Button
Acknowledgement of "Local" fault, fault relay "System"
17
CF card memory
Slot for CF card (web server data)
18 CF
Card
Config/Report Slot for CF card (firmware update)
19
Q11,Q12 Q21,Q22
Q31,Q32 Q41,Q42
Connection terminals for 4 relays with NC contacts
20 Report
Button
For function, see “Button combinations“
21 Modem
Button
initializes modem, checks connection to the modem (short) / sends system report (long)
22
Q73,Q74 Q83,Q84
Connection terminals for 2 relays with NO contact
23
Lug for cable tie (cable strain relief)
24
Fastening spring to mount the central communication unit to a standard rail TH 35-7.5
25
Snap
cover
26
Cover (can be opened without tools if Ethernet card OZZ7E5 needs to be inserted)
27
Lower
housing
section
5/18
Building Technologies
Central communication unit OZW775 V2.0
CE1N5663en
HVAC Products
29.10.2008