General Catalog

Automation in titration
731 Relay Box
• Two 115/230 V AC outputs
• Two DC outputs
• One standard cable is sufficient for communication
with all Metrohm instruments
Additional device for controlling up to four external
devices such as pumps or valves with mains connection
or direct current consumers via TTL signals, including
connection cable for devices with a 25-pin «remote»
interface.
Ordering information
2.731.0010 731 Relay Box
Various Metrohm devices can address the Relay Box
via their remote lines. Regardless of the type of device,
a single standard cable is all that is required for communication.
The Relay Box scans the 14 input lines and
switches the assigned voltage outputs accordingly.
Automated systems require the switching of heaters,
pumps, valves, thermostats or other external devices.
This requires the use of relays to switch mains or lowvoltage
supplies on and off as necessary. The switching
should take place via remote lines from a Titrino, Titrando,
sample changer or other Metrohm instrument.
The Relay Box meets all these requirements on a very
small footprint.
The Relay Box provides four voltage outputs. Two
115/230 V AC outputs are used for switching the
mains voltage. The maximum power delivery per output
is 1150 W, so that the instrument can also be used
for providing power to high-consumption devices such
as heating baths or thermostats.
In addition the Relay Box has two DC outputs, whose
voltages can be set to 5, 10, 18 or 24V.
731 Relay Box
21 — AT