2. Installation
1.
Check products
2-7
TNU
(1) Power-on display (red)
When this light is on, the power supply 24 V DC is being input.
(2) Upper-level network communication status display (green)
When this light is on, it indicates communication in process with
the upper-level master device. Light goes off at a TNU network
setting error, indicating a failure of communication with the master.
The light remains off until alarm reset processing is done.
(3) TACnet communication status display (green)
When this light is on, it indicates no communication with lower-
level devices, or normal communication. When the number of
retries has been surpassed and a communication error occurs,
the light goes off and remains off until alarm reset processing is
done.
(4) Error display (red)
When normally connected with the upper-level master device,
the light goes off. When this display is flashing, it is in startup or a
TNU system error has occurred.
Upper-level network ID setting switch
Sets the device ID of the upper-level network by the x10 rotary
switch and x1 rotary switch values.
CN1
Upper-level network communication connector
Connect to the upper-level device network.
Mode change switch
Switch to select the upper-level device that transmits command to
the lower-level device
On CN1 side, the communication command by the upper-level
network master (I/O mode)
On CN2 side, the communication command by the upper-level
device supporting TACnet (PC/TDO mode)
CN2
Communication connector. Connector to connect the PC or TDO.
CN3
Communication connector. Connector to connect to the TJU.
LED (MS)
Indicates unit operation status.
LED (NS)
Indicates network communication status.
CN4
Power connector. Connector for the input power supply.
(FG)
Ground wire is connected.
MODE
V-
STAT
3
CN
2
CN
4
CN
S1
0V
24V
S2
NS
MS
TJU
CN
1
V+
L
NA
x1
x10
5
8
0
1
7
3
6
9
2 4
1
2 3
9
4
7
0
5
8
6
H
SLD
(1) (2) (3) (4)
TNU-DV
MS/NS LED display
LINK
Link
Lit off
No link, no data communication
Green lit
Link established
Green flashing
In data communication
MS
Module status
Lit off
Power OFF
Green lit
In normal operation
Green flashing
Unit setting not done
Red lit
Fatal unit error
Red flashing
Clearable unit error
NS
Network status
Lit off
Power OFF / IP address unset
Green lit
Online: connection established
Green flashing
Online: connection unestablished
Red lit
IP address overlap (fatal error)
Red flashing
Communication time out
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