Optional Station Power Voltages; Type Of Communication - GarettCom 5843HRT User Manual

The Model 5844HRT or Model 5844SHRT can be ordered to accommodate 24 Vdc to 48 Vdc power.
Model 5844HRT is provided with a ground stud on the side of the case. An appropriate
earth ground must be connected to this stud before power is applied to the unit. The
internal surge-withstand protection inside of the unit uses this ground stud as a sink for
power surges. If the unit is not properly grounded, it may store a charge until a path to
ground becomes available. The lowest impedance to ground is recommended to avoid a
ground potential rise.
3.5

OPTIONAL STATION POWER VOLTAGES

Models 5844HRT and 5844SHRT can be ordered to be powered by 24 to 48 Vdc. This
modification is indicated by the suffix -L added to the Model number (i.e. 5844HRT-L).
When ordered with either of these options, the unit has that DC voltage rating only and is
Surge Withstand Protected to IEC 61000-4-4, EN61000-4-5 Standard and ANSI IEEE
C37.90.1 - 1989.
3.6

TYPE OF COMMUNICATION

Model 5843HRT and Model 5844HRT Link/Repeaters support the following types of
asynchronous communications:
Simplex - Transmission only or receive only
Half Duplex - Sequential transmit and receive
Full Duplex - Simultaneous transmit and receive
Point-to-Point:
(Repeat Switch "OFF")
Master/Save Loop:
Master (Repeat Switch OFF")
Master/Slave Loop
Slave (Repeat Switch "ON")
Peer-to-Peer Loop:
Master (Repeat Switch "OFF" and pin 7 "high")
Peer-to-Peer Loop:
Slave (Repeat Switch "OFF" and pin 7 "low")
WARNING
When installing a Model 5844HRT or Model 5844SHRT
Link/Repeater, an earth Ground must be attached to the
Ground Stud on the side of the case before connecting
to power. Failure to follow this procedure may result in
electrical shock to personnel.
NOTE
Simplex Half Duplex
X
X
X
X
X
3-5
Full Duplex
X X
X X
X
X X
X