Schneider electric zelio logic remote monitoring module schneider electric sr2 mod01 the sr2mod01 is an analogue pstn modem designed for use with the sr2com01 zelio communication interface for smart relay when connected via the supplied telephone cable the unit provides an interface between the sr2com01 and external monitoring equipment pc etc for the provision of alarm signals instructions program transfer firmware update monitoring etc schneider electric sr2 mod01 zelio logic remot