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Input impedance >300KΩ
Isolation Not isolated to power supply or
analog inputs
Ǐ
Digital I/O add-ons available (see p14)
Configuration
USB programmable Via 'PC Setup' port
using Bridge Key* USB programmer
*
Sold separately
Define WorkBench Simple configuration
software. Free download at
defineinstruments.com/workbench
Comms
Protocols Modbus RTU, Define ASCII,
Custom (via Macro Script)
Serial Port (Port 2) RS485*
Selectable baud rate 2400-230400 baud
8 bit, no parity, 1 stop bit
*
The RS485 Serial Port (Port 2) is not available
on models with a Sensor Bus expander fitted
Display Port (Port 3) RS485
Selectable baud rate 2400-19200 baud
8 bit, no parity, 1 stop bit
EIA-485 Compliant
Ǐ
Ethernet add-on also available (see p13)
Data Logging
200 samples with up to 30 parameters plus
time stamp per sample
Real-Time Clock (RTC)
RTC time base UTC. Local time in device
with automatic daylight savings adjustment
Ǐ
16GB SD add-on available (see p13)
© 2024 Define Instruments
G3 IoT Manual | Doc No: 2303-00000-0-1 | Rev: 24V05 | 19 Mar, 2024
Wireless Network Interface
Wi-Fi Protocol
802.11b/g/n. 150Mbps max. 2.4GHz*
*
Not compatible with 5GHz Wi-Fi net-
works. Check your configuration as most
access points can run 2.4GHz and 5GHz
simultaneously
Ǐ
Cellular modem also available (see p13)
Network Protocols
Transport Layer Security (TLS) TLSV1.2.
Mutual authentication via X.509 certificates
MQTT Version 3.1.1. Supports QoS 0 & 1
ModBus TCP Register access (Slave)
MDNS Service Discovery
STNP Time service
OTA Updates
Over the air firmware update delivery
Ǐ
Cellular modem or Ethernet interface
also available (see p13)
Environmental Conditions
Operating temp –40 to 149°F (–40 to 65°C)
Storage temp –40 to 149°F (–40 to 65°C)
Operating humidity 5–85% RH max,
non-condensing
Altitude Up to 6,550ft (2,000m)
11
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