Small but super: power for your automation 731 Relay Box is the name of the voltage on and off when required. The Alternating voltage ... new switchable power supply switching step should be effected by a Titrino, Titroprocessor, sample The 731 Relay Box offers four volt-Automated systems require the changer or any other Metrohm instru-age outputs. Two 115/230 V alternat-switching of heating systems, pumps, ment via «Remote» lines. The new ing voltage outputs are used for valves, thermostats or other external 731 Relay Box combines all these switching the line voltage. As the devices. For this relays are needed requirements in a housing of only 10 maximum power output is 1150 W per that can switch the line voltage or low cm x 19 cm x 23 cm! output, the instrument is also suitable for the power supply of loads with a high power consumption such as heating baths or thermostats. ... or direct voltage The 731 Relay box also has two direct voltage outputs whose voltage can be set to values of 5, 10, 18 or 24 V. One cable is enough A very wide range of Metrohm instruments can control the Relaiy Box via their «Remote» interfaces. No mat-ter what type of instrument you are using, one single standard cable (6.2125.100) suffices for communica-tion. The 731 Relaiy Box scans the 14 input lines and switches the as-signed voltage outputs correspond-ingly. Everything configured at the turn of a switch The user has the possibility to connect each voltage output to its own signal line or to link one signal line with several outputs. Simply turning the selector switch is all that is needed to configure the instrument. Fig. 1: Back and front of the practical 731 Relay Box. Fig. 2: Metrohm automated systems using the 731 Relay Box. Multiple application possibili-pleted, rinse the titration vessel and • Using the 731 Relay Box, the 772 ties prepare it for the next determina-Pump Unit, the 711 Liquino as well tion (cf. Fig. 4). In contrast to dia-as 700 Dosinos, flexible liquid han-In combination with other instruments phragm pumps, the Pump Unit al-dling units can be set up. the Relay Box offers a wide range of lows to deliver even critical media applications in the laboratory and • A gas valve (6.2726.080) can be such as samples containing solid plant. It allows to set up even highly connected to the DC voltage out-particles or organic solvents. complex automated systems. put of the Relay Box, which makes • Heating plates or stirrers can be it possible to carry out deter- • Together with the 731 Relay Box connected to the AC outputs of the minations in an inert gas atmos-the new 772 Pump Unit can be 731 Relay Box and thus control-phere. used to siphon off the sample af-led, i.e. switched on and off, by ter the titration has been com-Titrinos or 726 Titroprocessors. • In bigger automated systems, e.g. PC-controlled titration systems, different instruments (e.g. Titrinos) can be selectively switched on and off using the 731 Relay Box. These switching steps can take place si-multaneously. Technical specifications of the 731 Relay Box Two DC outputs: Voltage Output voltage adjustable: 0, 5, 10, 18, 24 V Current Max. 1 A per output Two AC outputs: Voltage Output voltage = line voltage Current Max. 5 A per output «Remote» interface: Functioning The «Remote» signals are passed through the Relay Box without being modified in any way and transmitted to an instrument connected to the «Remote Out» socket Input 25 pin D-Sub instrument plug 14 input lines Fig. 3: The Relay Box with the new 772 Pump Unit. Output 25 pin D-Sub instrument socket 14 output lines Line connection: Voltage Voltage selector 115/230 V Frequency Ordering information 50 ... 60 Hz Power consumption 2.731.0010 Relay Box Line voltage 115 V: Instrument with two AC and two DC voltage outputs for control-max. 1150 W ling external devices such as pumps (e.g. 772 Pump Unit) or valves via «Remote» signals; includes 6.2125.100 connecting Line voltage 230 V: cable for instruments with 25 pin «Remote» interface, e.g. max. 2300 W Titrinos, Titroprocessors, sample changers, Liquinos, conductometers or pH meters. Fig. 4: 772 Pump Unit in combination with the 731 Relay Box, used to siphon off the titrated sample and rinse the titration vessel (on the 730 Sample Changer). Metrohm Ltd. CH-9101 Herisau Phone +41 71 353 85 85 Fax +41 71 353 89 01 CompuServe 100031,3703 Subject to modifications – Printed in Switzerland by Metrohm Ltd., Herisau – 05.98 Internet http://www.metrohm.ch This document is available in English and German.