We reserve the right to alter specifications without notice

Campbell Scientific products are

available from:

Maximum Number of Sensors

Specifications

Supply Voltage:

9-30VDC

Power Consumption:

Quiescent:

< 2.0 mA

Peak:

< 250 mA

Operating Temperature:

-40ºC to +60ºC

Relay Type:

Latching

Communications

Hardware:

SDI-12, RS232 or RS485

Protocol:

SDI-12 Version 1.3 or MODBUS via RS232/485 at 19,200 bps

Digital I/O Input Voltage

Maximum:

+20 Vdc

Minimum:

-12 Vdc

Operating Temperature:

-40ºC to +60ºC

Dimensions

Length:

17.0 cm (6.7 in)

Height:

6.1 cm (2.4 in)

Width:

3.7 cm (1.5 in)

Weight:

0.48 kg (1.05 lb)

OrderingInformation

Relay Module

LR4

Four Channel Latching Relay Module

Relay-to-Datalogger Cables

A Standard 3 m cable is included.

CABLE3CBL

Three-conductor, 22 AWG cable with drain wire and Santoprene jacket used for SDI-12 communications.

CABLE4CBL

Four-conductor, 22 AWG cable with drain wire and Santoprene jacket used for SDI-12 and digital I/O port

communications.

CABLE2TP

Two-twisted-pair, 22 AWG cable with drain wire and Santoprene jacket used for ModBus communications.