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26
NT2000M
External device
Load
ALM output
Internal circuit
100 to 240 VAC input
Item
Content
Output type
Relay output
Rated load
1 A at 24 VDC
Maximum load current
1 A
Minimum switching capacity
10 mA at 5 VDC
2-6
RS-232C Interface Connector
The RS-232C interface connector is used during communications between
the PT and the Support Tool. It is located under the RS-232C interface con-
nector cover on the front of the NT20M or NT2000M.
Pin Allocation
Pin no.
Symbol
Name
1
FG
Frame Ground (not used)
2
SD
Send Data
3
RD
Receive Data
4
RS
Request to Send
5
CS
Clear to Send
9
SG
Signal Ground
Connection Diagram
SD
RD
RS
CS
SG
FG
SD
RD
RS
CS
SG
FG (Not connected.)
1
2
3
4
5
7
2
3
4
5
1
9
Personal computer
(25 pins)
Shielded wire
D-sub connector, 9 pins
RS-232C
PT
Note 1. RS-232C communications conditions are set automatically by the NT20M
Support Tool.
2. Connectors can be connected and disconnected with power turned on.
3. This connection diagram cannot be used for the Host Interface Unit.
RS-232C Interface Connector
Section 2-6