GIMA Options MODBUS Communications

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GIMA Options MODBUSŽ Communications

The MODBUSŽ Communications Option Module for the GIMA Series adds multi-drop serial commun- ications to any standard GIMA meter. The device uses a high speed microprocessor to extract information from the meter and interface to an industry standard MODBUSŽ system.
Use of a dedicated communications processor ensures optimum efficiency, allowing fast access to data on systems with multiple meters. At 19200 baud it is possible to access and download the main instantaneous data tables (24 values) from 10 GIMA meters in one second

The use of MODBUSŽ protocol ensures compatibility with existing systems and/or many readily available software packages. This Options Module may be configured as RS485 or RS422 providing 2 or 4 wire communications over distances up to ž mile. Data rates of 4800, 9600, 19200 baud may be selected to suit systems requirements.

The Communications Option Module is available in two formats:

Standard: Only parameters displayed on the GIMA meter can be accessed via MODBUSŽ

All Value: The full set of GIMA G400 parameters can be accessed via MODBUSŽ from any GIMA

GIMA Options MODBUSŽ Specifications

MODBUSŽ Serial Comms

Bus Type RS422 / RS485 4/2 wires+OV Half Duplex

RX Loading ź unit load / options module

TX Drive 32 unit loads

Protocol MODBUSŽ RTU w/16 bit CRC
(JBUS compatible)

Baud Rate 4800,9600,19200 or user programmable

Address User-programmable (1-247)

Max Data Packet Any complete table ( energy, instant-
aneous, set-up, etc.)

Command Rate New command within 5ms of previous one

Mechanical (Options Module) Auxiliary Supply

Enclosure Custom Options enclosure
Material: Mablex UL94-V-0 Option Module 115VAC or 230VAC 50/60-Hz ą 15%
Automatic voltage selection when inserted into GIMA meter.
GIMA meters must be rated to match either selection.

Dimensions 2.95" x 2.32" x 3.43"

Unit unfitted 75mm x 59mm x 87mm

GIMA meter
^{+ Options} 5.43" x 3.78" x 3.78"
138mm x 96mm x 96mm Load 3VA Maximum

Behind Panel 5.12" ( 130mm) Isolation 2.5kV contimuous (Internally wired to GIMA auxiliary inputs)

Weight Approx. 7 oz (200g)

Terminals Rising Cage. Cable (max ).06"(1.5mm)
Solid .04" (1.0mm) Stranded

MODBUSŽ Serial Comms
Bus Type	RS422 / RS485 4/2 wires+OV Half Duplex
RX Loading	ź unit load / options module
TX Drive	32 unit loads
Protocol	MODBUSŽ RTU w/16 bit CRC (JBUS compatible)
Baud Rate	4800,9600,19200 or user programmable
Address	User-programmable (1-247)
Max Data Packet	Any complete table ( energy, instant- aneous, set-up, etc.)
Command Rate	New command within 5ms of previous one

Mechanical (Options Module)		Auxiliary Supply
Enclosure	Custom Options enclosure Material: Mablex UL94-V-0	Option Module	115VAC or 230VAC 50/60-Hz ą 15% Automatic voltage selection when inserted into GIMA meter. GIMA meters must be rated to match either selection.
Dimensions	2.95" x 2.32" x 3.43"
Unit unfitted	75mm x 59mm x 87mm
GIMA meter ^{+ Options}	5.43" x 3.78" x 3.78" 138mm x 96mm x 96mm	Load	3VA Maximum
Behind Panel	5.12" ( 130mm)	Isolation	2.5kV contimuous (Internally wired to GIMA auxiliary inputs)
Weight	Approx. 7 oz (200g)
Terminals	Rising Cage. Cable (max ).06"(1.5mm) Solid .04" (1.0mm) Stranded