38
M4RTU/M4 I/O User’s Guide
INSTALLATION AND SETUP
Table 3-3 M4RTU/M4 I/O Configuration Jumpers (factory defaults are indicated in bold)
Flash Jumpers (FL)
FL identifies the TYPE of firmware EPROMS (either FLASH or UV EPROMS). FL removed indicates FLASH EPROMS.
FL installed indicates UV EPROMS. The default setting is for this jumper to be removed. All M4RTU/M4 I/O
controllers have FLASH EPROMS, so this jumper should NEVER be installed.
*RAM Jumper (MJ)
MJ identifies the AMOUNT of RAM installed (and hence the TYPE of RAM chips). MJ installed indicates 256
KB (Kbytes) which is in the form of 2 chips that are 1 megabit each. MJ removed indicates 1 MB (megabyte)
which is in the form of 2 chips that are 4 megabits each. If the M4RTU/M4 I/O has a “1 MB RAM Installed”
sticker, the default setting is for this jumper to be removed. If the M4RTU/M4 I/O does not have this sticker, the
default setting is for this jumper to be installed.
ROM Jumper (RJ)
RJ identifies the AMOUNT of EPROM memory installed (and hence the TYPE of EPROM chips) or vice versa.
RJ installed indicates 256 KB (Kbytes) which is in the form of 2 chips that are 1 megabit each. RJ removed
indicates 1 MB (megabyte) which is in the form of 2 chips that are 4 megabits each. The default setting is for
this jumper to be installed.
Ring Indicator Jumper (JP2 )
By default, this jumper is installed, establishing a ground on COM0 Pin 7 of the M4RTU/M4 I/O base unit.
The jumper should remain installed under most circumstances.
If you need an extra programmable RS-232 input (such as a ring indicator), remove this jumper. Since this will
eliminate the ground on COM0, it will be necessary to wire your RS-232 device ground to COM1 Pin 3 to
prevent common mode problems and resulting damage.
Jumper
Description
Position
Setting
FL
EPROM
Type
In
UV EPROM (not used)
Out
Flash EEPROM
MJ
RAM Size
* In
2 x 1Mb (256 KB)
* Out
2 x 4 Mb (1 MB)
RJ
EPROM Size
In
1 Mb Flash EEPROM
(256 KB)
Out
4 Mb Flash EEPROM
(1 MB)
(Opto 22 P/N
M4RTUF1M)
JP2
Ring
Indicator
In
COM0 Pin 7 is ground
Out
COM0 Pin 7 is ring
indicator
Summary of Contents for Modular M4RTU
Page 6: ...6 M4RTU M4 I O User s Guide TABLE OF CONTENTS...
Page 74: ...74 M4RTU M4 I O User s Guide FIELD WIRING...
Page 80: ...80 M4RTU M4 I O User s Guide PRODUCT SPECIFICATIONS...
Page 82: ...82 M4RTU M4 I O User s Guide ADDRESS JUMPER CONFIGURATION...
Page 86: ...86 M4RTU M4 I O User s Guide UPGRADING RAM AND FLASH EEPROM...
Page 89: ...M4RTU M4 I O User s Guide 89 WORKSHEETS Figure F 3 M4RTUX I O Extender I O Module Worksheet...
Page 91: ...M4RTU M4 I O User s Guide 91 WORKSHEETS Figure F 5 Field Wiring Worksheet Example 2...
Page 94: ...94 M4RTU M4 I O User s Guide WORKSHEETS...
