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Programming
Auxiliary power
supply system
The parameter values are stored in the unit in a
non-volatile EEPROM memory. Thus the set-
ting of parameter values can be performed and
changed by means of the push-buttons on the
front panel or via the serial communication
using e.g. the SMS 010 software. This means
that the annunciator unit is fully field-program-
mable.
The plug-in power supply module of the an-
nunciator unit is specified for supply voltage
within the range of 80...265 V AC or DC
(SPGU 240A1) or 18...80 V DC (SPGU 48B2).
The annunciator unit is equipped with one
power supply module but with two identical
supply voltage inputs (figure 17). Generally
only one of the inputs is used, but the annuncia-
tor can be supplied from two sources. It must,
however, be noticed that the two supply inputs
20
Supply 1
21
22
23
Supply 2
24
Fig. 17. Principle diagram for the power supply system.
220 VAC
110 VDC
Fig. 18. Example of double power supply arrangement. Supply 1: 220 V AC with an isolating
transformer 20 VA, 220 V/220 V. Supply 2: 110 V DC supply.
For connecting a PC directly to the serial inter-
face of the unit (for parameterization) the cables
SPA-ZP 6A3 and SPA-ZP 21A are used.
The entry to the parameter memory can be
blocked by means of a plug selector which is
located on the PCB right behind the front panel,
see figure 31 on page 29.
are galvanically connected. Thus, in case two
supplies are used, it is recommended that the
two supply sources are galvanically isolated. If
an ac supply is used, an isolating transformer can
be installed to provide the galvanic separation
(figure 18).
The insulation level between the supply source
and the electronics as well as between the field
contact circuits and the electronics is 2 kV, 50
Hz, 1 min.
SPGU
20
Supply 1
21
22
23
Supply 2
24
Field contact supply 48 V -
Logic supply 8 V-
Relay supply 24 V -
SPGU
SACO 16D3
19
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