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26
•
Insulated Transformer
The NT600M has built-in anti-noise features which are sufficient for handl-
ing general noise from power lines, but ground noise can be greatly re-
duced by supplying power through a 1:1 insulated transformer. The second-
ary side of the insulated transformer should be an isolated neutral system.
•
Power Capacity
Use a rated power supply (100 to 240 VAC; 50/60 Hz) of at least 50 VA.
•
If power lines are long, then use wires of at least 2 mm
2
to avoid a drop in
voltage.
•
Use twisted-pair cables.
2-5-3
LG and GR Terminals
HOST
RUN
INPUT
ALARM
OUTPUT
100 to 240 VAC
50/60 Hz
LG
GR
Terminal screws are M4.
•
GR is the ground terminal. In order to avoid electric shock, use separate
ground wire (at least 2 mm
2
) and a class-3 ground (ground resistance
100
W
or less).
•
LG is the noise filter neutral terminal. If malfunction results from excessive
noise, or to prevent electrical shock, short-circuit LG and GR and use a
class-3 dedicated ground.
•
The ground line should be 20 m or less.
•
Sharing a ground line with other machinery or grounding to the girders of a
building may be harmful.
2-5-4
HOST RUN INPUT Terminals
Use the HOST RUN INPUT when you want to monitor the RUN status of the
host.
Enable:
Turn OFF SW1, pin 2.
Disable:
Turn ON SW1, pin 2.
24 VDC
HOST
RUN
INPUT
Host
Host RUN status
with transistor ON.
(This terminal has no polarity.)
620
W
5.6 k
W
1,000 PF
Int
ernal
ci
rc
ui
t
Wiring and Connectors
Section 2-5
Summary of Contents for NT600M Series
Page 1: ...NT600M Programmable Terminal Operation Manual Revised October 1997 ...
Page 2: ...iv ...
Page 4: ...vi ...