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Note
Section 1-2
2-2-3 Comparison between NT600S and NT600M
The NT600S is a unitary PT which incorporates a system ROM, screen memory,
and a host I/F unit (host link, NT link, and RS-232C) as the standard equipment in
one body.
The NT600S has the following features which are different from those of existing
NT600M;
Function NT600S-ST121/-ST211-EV NT600M-DT122
Communication Host link/NT link/NT Link (1:1, 1:N)/RS-232C
incorporated.
The C200H direct communication function can
be used if the separately purchased C200H
interface unit (NT-LB122) is mounted on the
rear of the NT600S.
Host I/F units are required.
Communication connec-
tor
The communication connector (9-pin) for a
PC/Host is shared with that for a support tool.
When using the C200H direct communication
function, there are separate connectors for
communications with the support tool and PC/
Host.
Both the support tool connector (9-pin) and
PC connector (25-pin) are located on the
back side.
Host RUN input terminal/
Alarm output terminal
Not provided Provided
System keys Not provided Provided
Contrast control Back side (ST121) None (ST211) Front side
Expanded I/O unit Expanded not possible Possible with DN type
Waterproof performance NEMA4 Conforms to IP52F.
Visibility in direct sunlight Good (ST121) None (ST211) Barely visible
Power supply 24 VDC, more than
15 W (ST121(B))
24 VDC, more than
25 W (ST211(B))
100/200 VAC
Allowable momentary
power interruption time
Not guaranteed 5msec
System ROM Built in (512 KB, not replaceable) System ROM compatible with host I/F unit is
required.
Resume function Provided (if optional battery is mounted) Provided
History retaining function Provided (if optional battery is mounted) Provided
Screen transfer
✓ ✓
Screen data compatibility
✓
(Note 1)
--
PC ladder compatibility
✓
--
Backlight replacement
✓
(ST121 (B))
Screen data memory Built in (flash memory only) Optional (select from EP-ROM, SRAM, and
EEP-ROM)
Screen data memory
capacity
128 KB 256 KB max.
Outside dimensions 275 192 71mm 325 198 105mm
1. If a system key function is required on continuous screens or for numerical
setting or buzzer stop, use a support tool and set the touch switches which
have the system key function in such screens.
For details, refer to “System Key Functions” on page 142.
128 KB of screen data memory capacity is equivalent to 200 screens consist-
ing mainly of messages, or 70 screens consisting mainly of figures.