Comparison Between Nt20S, Nt20M, And Nt20 - Omron NT20S-ST121B-EV3 User Manual

Functions of NT20
1-2-3

Comparison between NT20S, NT20M, and NT20

Function
Communications
Communications connec-
tor
Host RUN input terminal/
Alarm output terminal
System keys
Contrast control
Waterproof performance
Allowable momentary
power interruption time
System ROM
Resume function
History retaining function
Screen transfer
Screen data compatibility
PLC ladder compatibility
Backlight replacement
Screen data memory
Screen data memory
capacity
Outside dimensions
Note
6
The NT20 is a unitary PT which incorporates a system ROM, screen memory,
and a host I/F unit (Host link, NT link, RS-232C, and C200H direct communi-
cations) as the standard equipment in one body.
The NT20 has the following features which are different from those of existing
NT20/NT20S:
NT20S
• Host link/NT link incorpo-
rated NT20S-ST121-EV3
• C200H direct communica-
tions incorporated
NT20S-ST122-V1
• RS-232C incorporated
NT20S-ST128
(other host I/F units cannot
be connected)
• The communications con-
nector (9-pin) for a Host is
shared with that for the Sup-
port Tool. (NT20S-ST121-
EV3/ST128)
• Connectors for Support Tool
(9-pin) and Host connec-
tions on the rear face
(NT20S-ST122-V1).
Not provided
Not provided
Back
Equivalent to oil-resistant
IP65
Not guaranteed
Built in (not replaceable)
Not provided
Not provided
❍
❍ (Note)
❍
❍
Built in (flash ROM only)
96KB
190 × 110 × 58 mm
If a system key function is required on continuous screens or for numerical
setting or buzzer stop, use the Support Tool and set the touch switches which
have the system key function in such screens.
For details, refer to 4-7-3 System Key Functions on page 154.
NT20M-DT121-V2
Host I/F units are required.
The Support Tool connector
(9-pin) is located on the front.
The Host connector (25-pin)
is located on the back.
Provided
Provided
Front
Conforms to IP54F.
5 ms
System ROM compatible with
host I/F unit is required.
Provided
Provided
❍ (Only possible if screen
data memory is an SRAM)
–
–
Possible with NT20M-DT131. Do not need
Optional (select from
EPROM, SRAM, and
EEPROM)
128 KB max.
220 × 110 × 82 mm
Section 1-2
NT20
• Host link/NT link
• C200H direct communica-
tions
Host I/F unit for C200H com-
munications is required.
• RS-232C incorporated
NT20-ST128 (other host I/F
units can not be connected)
• The communications con-
nector (9-pin) for a Host is
shared with that for the Sup-
port Tool. (Port A)
• The communications con-
nector (9-pin) for a Host
(Port B)
Not provided
Not provided
Back
Equivalent to oil-resistant
IP65
Not guaranteed
Flash ROM rewriteable
Not provided
Not provided
❍
❍ (Note)
❍
Built in (Flash ROM)
512 KB
190 × 108 × 53.5 mm