Johnson Controls NAE55 Installation Manual page 10

Figure 14: M-Bus Level Converter Connections
Table 2: M-Bus Level Converter connection detail
Callout Description
M-Bus connections:
1 13: M+
14: M-
Power connections (24 VAC/DC):
9: PE
2
11: 24+ V/~
12: 24- V/~
RS-232 wire connection (serial cable INT-DX-KAB01):
5: TxD (transmit data); PIN 2 on RJ12
3
6: RxD (receive data); PIN 3 on RJ12
7: GND (ground); PIN 5 on RJ12
Connecting KNX devices
The NAE connects to a KNX network device by using
the KNX/IP interface router. (After installation and
wiring are complete, refer to the Network Engine
10 NAE55/NIE55 Installation Guide
Commissioning for KNX Vendor Integration Application
Note (LIT-12013148) for additional information.)
1. Connect an Ethernet cable from the building's
network jack to the port on the front of the KNX
gateway (Figure 15).
Note: Depending on the size of your network,
you can use either a KNX Interface or Router as
a gateway. The Interface connects the network
engine to a single KNX line, while the Router
acts as both an Interface and a Line Coupler
over Ethernet to connect the network engine to
the network, not to a single device.
2. Connect an Ethernet cable from the building's
network jack to the RJ-45, 8-pin Ethernet port on
the network engine.
Figure 15: KNX/IP Interface Router
Table 3: KNX/IP Interface Router connection
detail
Callout Description
1 To power supply
2 To KNX devices
3 To Ethernet network
3. For a single KNX line, wire from the red and
black terminals on the gateway to the devices.
For multiple KNX lines, wire from the red and
black terminals on each gateway to the devices
on the same KNX line.