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Building Technologies
Fire Safety & Security Products
Power supply
NK8237 power connections
X103: Power Supply
Power supply
Pin
Primary
1
2
3
N/A
4
N/A
5
Secondary
6
(optional)
7
8
X2/X3: Ethernet Connector
A standard RJ45 connector connects Ethernet. Category 5 or 6 UTP cabling is best
suited.
Pin
Assignment
1
TX+
2
TX–
3
RX+
4
n.c.
5
n.c.
6
RX–
7
n.c.
8
n.c.
X101: Onboard I/O (Output Relay)
Pin
Assignment
1
Common
2
NO output
3
NC output
NK8237 hardware installation
X103
X104
X105
RS485-1
RS485-2
Power connections.
Assignment
+
Earth
–
Not used
Not used
+
Earth
–
Ethernet connections.
Onboard I/O (output relay).
Hardware installation
4
A6V10403182_a_en
30.09.2014
21
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