Product specifications

Appendix A Hardware Units Technical Data
3BSE036351-510 A 243
Battery
The memory content is backed up with either an internal or external battery unit
(SB821). For back-up time see Table 50 on page 243.
Table 51 on page 243 shows Internal battery data. For external battery data,
see SB821 External Battery – AC 800M Memory Back-up on page 392 and SB822
Rechargeable External Battery – AC 800M Memory Back-up on page 394.
Electro-magnetic Compatibility and Electrical Safety
PM851/PM856/PM860/TP830 meets the requirements specified in
EMC Directive 89/336/EEC.
The figures given in Table 50 on page 243 are valid if the batteries are installed
after a normal CPU power-up, allowing for the memory back-up function to be
activated.
Table 50. Back-up times for PM851/PM856/860
Source Back-up time
Internal battery Minimum 48 hours
External battery SB821 Minimum 1 month
External battery SB822
Note: Recharge time for an empty battery is
approximately 7 hours.
Minimum 100 hours when fully
charged
Table 51. PM851/PM856/PM860 and TP830 – Internal battery data
Item Value
Internal battery
Battery Type Low rate lithium, 3.6 V, 950 mAh
Size ANSI size 1/2 AA, IEC size 1/2 R6
Lithium content 0.3 g