PI-J375-001 Rev I3
J375 Modbus Adapter
DATA SHEET
’ The J375 Modbus” 0 adapter is a communications
FEATURES
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Connects Micro 84 (slave) to Modbus
communications system.
Addressing for 247 slaves on one
system
Mounting and packaging similar to
Micro 84 l/O modules
No modifications required to Micro 84
One RS-232-C port
Compatible with Modicon J378 modem
plus many commercial modems
Permits simultaneous P370 programm-
ing and Modbus communications
Comprehensive diagnostic capability
and extensive error checking
Switch selectable address and system
parameters
Supports mixed Modicon PC network
’ GENERAL DESCRIPTION
The J375 Modbus Adapter is a communica-
tions interface module for the Micro 84
controller. As such, it interfaces the Micro
84 to a Modbus industrial communication
system. It allows the Micro 84 to be a slave
PC to a Modbus master.
The adapter is packaged in a modified
Micro 84 l/O module case. This case is
made of Lexan molded plastic with mount-
ing brackets located on the rear of the
case. This makes the J375 lightweight and
easy to install.
The J375 provides port connections for the
following: A P370 Micro 84 Programmer, an
RS-232-C device and a Micro 84 controller.
In addition, the adapter is equipped with
factory selectable options for 1151220 VAC
power. The J375 contains its own power
supply that generates all operating voltages
for the adapter’s internal processor. The
d J375 does not require power from the Micro
84 or the data bus.
The adapter provides three LED indicators.
interface for the Micro 84’m controller.
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“Run”,
“Comm Active”, and “Error”. These
indicators display both operating status
and trouble indications. You can use these
indicators for fast troubleshooting.
The J375 provides dip switches at the rear
of its case for address and system
parameter selection.
The Modbus adapter supports function
codes l-8 and 15-19. In addition, the J375
allows simultaneous use of both the Mod-
bus port and P370 port. In the event of a
conflict, the adapter gives the Modbus port
the higher priority, and the P370 port
monitors operations only.
The J375 assures maximum system
integrity through parity and message
redundancy checks, exception responses,
loopback diagnostics and automatic retries.
The J375 Modbus Adapter is compatible
with all current Modbus products, which
allows a mix of Gould PC’s on a Modbus
network.
-!! GOULD
Electronics
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
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