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3-2
Section
Connecting Link Adapters
19
power to the Link Adapter through pin 6 of the RS-232C connector, so an exter-
nal power supply is not required.
Note
1. The RS-232C connector is not insulated from the RS-422A/RS-485 connec-
tor within the NS-AL002 Link Adapter.
2. Always turn OFF the NT21’s power supply before installing/removing a Link
Adapter or connecting/disconnecting cables.
3. Do not touch the surface of the printed circuit board or any electronic compo-
nents with bare hands. Also, always discharge any static electricity by
touching a grounded object before installing the Link adapter or connecting
cables.
The following diagram shows the dimensions of the NS-AL002 Link Adapter. All
dimensions are in mm.
Mounting screw (x2)
(Units: mm)
The NS-AL002 Link Adapter connects directly to serial port B on the NT21. After
inserting the D-SUB connectors, tighten the screws on the connectors to secure
them. Tighten the D-SUB connector screws to 0.3 N
⋅
m and tighten the RS-422A/
RS-485 terminal screws to 0.5 N
⋅
m.
When removing the cables, loosen the screws and pull out the connectors.
The following tables list the NS-AL002 Link Adapter’s general and communica-
tions specifications.
General Specifications
Item
Specification
Dimensions
45
49
28.5 mm (W
H
D)
Weight
50 g max.
Ambient
Operating
0 to 50
_
C
temperature
Storage
–20 to 60
_
C
Operating ambient humidity
35% to 85% (with no condensation)
Rated power supply voltage
+5 V
"
10%
(through pin 6 of the RS-232C connector)
Rated power supply current
150 mW max.
Operating environment
No corrosive gases
Vibration resistance
Meets the NT21’s ratings.
Shock resistance
Meets the NT21’s ratings.
Dimensions
Installation and Removal
Specifications