Product specifications

Technical Data Appendix A Hardware Units
268 3BSE036351-510 A
Technical Data
For technical data on PM891, see Table 64.
Table 64. PM891 – Technical data
Item Value
Memory • 16 MB flash PROM (firmware storage).
• 256 MB of DDR2 SDRAM with integrity check.
Power Dissipation 15.8 W typical
19.5 W typical (incl. full supply to ModuleBus and CEX-
Bus.
Current Consumption 660 mA typical (750 mA max.)
(excl. supply of ModuleBus and CEX-Bus).
Power Input Connector Four pin, screw connector L+, L–, SA and SB.
Power Supply
Requirements
Inputs designated L+ and L– 24 V nominal, variation
between 19.2 V DC and 30 V DC.
Redundant Power
Supply Status Inputs
Inputs designated SA, SB
• Max input voltage 30 V
• Min. input voltage for high level 15 V
• Max input voltage for low level 8 V
These are status inputs and the threshold levels are
limits for logic "0" or "1" on the inputs, that is, not power
fail limits.
Power Reservoir 5 ms
Protection Rating IP20 according to EN60529, IEC 529.
Weight 1.6 kg (1.9 kg with package)
Dimensions W 200 x H 186 x D 102 mm (7.9 x 7.3 x 4.0 in)
Width is measured along the DIN-rail, depth from the
wall, and height vertically, including lock
mechanism.