5
1-4-2
NT2000M Programmable Terminals
The NT2000M-DT, touch-panel type and the NT2000M-DN131, non-touch-
panel type models employ a two-color backlight (changeable between white
and red), which is replaceable and is sold separately. The NT2000M-DN131,
like the NT20M models described above, does not come with an image data
memory chip mounted. This must be purchased separately.
System ROM is also sold separately. Select the System ROM according to
the Host Interface Unit that is mounted to the PT, as described in Host Inter-
face Units and Conforming System ROM below.
Memory Chips
In order for images to be saved, screen data memory is required. The follow-
ing memory chips can be purchased separately and mounted in the socket.
Type
Memory
capacity
Model
Recommended memory chips
SRAM
32K bytes
RAM22-15
HM62256ALP-15 (Hitachi).
128K bytes
RAM13-10
HM628128LP-10 (Hitachi).
EPROM*
64K bytes
ROM-KD-B
M5M27C512AK-12 (Mitsubishi)
128K bytes
ROM13-12B
HN27C101AG-12 (Hitachi).
EEPROM
32K bytes
EER22-20
HN58C256P-20 (Hitachi).
Notes 1. When using EPROM, use a PROM writer to write the data that was
created by the Support Tool, and then mount the chip in the PT.
2. If memory chips other than the recommended ones are used, the memory
backup battery capacity may not be sufficient.
Screen memory capacity varies according to which Screen Data Memory
Board is installed. The screen memory capacity, in turn, determines the num-
ber of screens that can be registered. Use the table below as a guide to se-
lect the amount of memory suitable for your needs.
Screen memory capacity
Number of registered screens
32K bytes
Mostly messages: 140 screens
Mostly graphics:
50 screens
64K bytes
Mostly messages: 250 screens
Mostly graphics:
100 screens
128K bytes
Mostly messages: 250 screens
Mostly graphics:
200 screens
Note The table above is strictly a guide. If the messages or other display data per
screen increase, the number of screens that can be registered will decrease.
Likewise, if the messages decrease, the number of screens (250 screens
max.) that can be registered will increase.
Host Interface Units provide the interface for communications between the
PT and the host, which may be either a C-series Programmable Controller or
an FA computer. The System ROM is ROM which contains the programs
necessary for operating the PT. Select the System ROM according to the
Host Interface Unit that is to be mounted to the PT. System ROM is used in
common for both NT20M and NT2000M PTs.
Host Interface Unit
System ROM
NT600M-LK201 (RS232C/SYSMAC WAY)
NT600M-LK202 ((RS-422)
NT600M-RT121 (SYSMAC BUS)
NT20M-SMR01-E
NT600M-LB121 (C200H Host Interface)
NT20M-SMR02-E
NT600M-LK201 (Host Link direct connection)
NT20M-SMR31-E
Memory Capacity and
Number of Screens
Host Interface Units and
Conforming System ROM
Models
Section 1-4
