Seametrics iMAG 4700r User Manual

IMAG 4700r INSTRUCTIONS
Seametrics • 253.872.0284 Page 19 seametrics.com
CONFIGURATION
Analog Output (4-20mA) Conguration. Since the
meter’s analog output is isolated and passive, loop power
must be supplied externally as shown on previous page. (In
addition, an external resistor RL will be needed to convert
the loop current to voltage for voltage-only input devices.)
The meter’s loop transmitter minimum voltage drop is
6Vdc which, with wiring resistance and loop power supply
voltage, will determine the maximum resistance for RL. The
ow rates corresponding to 4 and 20mA can be set by the
user via the SET 4 and SET20 tabs on the meter’s setup
menus.
Note: As congured by the factory, any alarm state will
force22.8mAontheloop.Thiscanbechangedto3.2mA
-seeTechnicalBulletin,‘iMAG4700/AG3000:Changingthe
4-20mAAlarm’.
Modbus
®
Serial Communication Conguration (factory
congured). These connections provide a half-duplex,
isolated, RS485 serial communications port using the
Modbus messaging protocol. The port is recongurable by
internal jumper settings to full-duplex RS232 or 3.3V CMOS
(See Seametrics Modbus Interface Description manual for
instructions). The TXD connection is the transmitted
data output from the meter and RXD is the received data
input to the meter. See Seametric’s Modbus Interface
Description, LT-103393 (available at www.seametrics.com)
for supported Modbus message protocol and electrical
interface specications.

Seametrics iMAG 4700r Specifications

General

Brand	Seametrics
Model	iMAG 4700r
Category	Measuring Instruments
Language	English