TREND IQ251 - Manual (Page 9)

9 IQ251 Installation Instructions TG103483 Issue 3, 8/10/08
Installation Instructions IQ251
3.2 Installation - Configuration
(continued)
Check Controller 10
b WD
(red)
a PWR
(green)
Check input
power
IQ Faulty
Switch On 9
O
I
IQ 251
RX TX
A D D R E S S
O N
R X T X
c I/O
(red)
IQ Faulty
IQ Faulty
IQ 251
RX TX
A D D R E S S
O N
R X T X
?
?
O
I
T - T + R - R + T - T + R - R +
N E T W O R K O U T I N
T - T + R - R + T - T + R - R +
N E T W O R K O U T I N
IQ Faulty
Check baud rate . Check
network cabling for short circuits
with a multimeter (NOT Megger)
LAN
LAN
IQ251
Power up other nodes until
faulty node is found
(LAN ). Correct fault.
Check Network
11
b TX
(yellow)
a RX
(yellow)
c LAN
(green)
Network Address Invalid
0, 2, 3 or >119
IQ251
IQ251