Siemens SAP 20 User manual
1
Fig. 1
1. Product description
The SAP 20 is a power supply unit suitable for an E-Bus and
has an output voltage of 12 V at a maximum of 2.3 A. The
housing offers space for 7 type SMT 11 (transponder) or SMR
11 (isolator/amplifier) circuit boards and for a 12 V, 24 Ah
battery. At least one SMT 11 must be fitted to use the cover
tamper contact.
2. Supply package
The SAP 20 UK package contains the following:
- One SAP 20 power supply unit.
- One set (4 off) of spacers.
- One SLP 20 UK language kit complete with :
- Installation instructions.
- One wiring diagram.
3. Mounting instructions
The SAP 20 external power supply unit is designed for moun-
ting in dry indoor rooms. It must not be exposed to dripping
or splashing water.
3.1 Open cover (Fig. 1)
1 - Slacken cover screw W.
2 - Remove cover.
3.2 Product overview (Fig. 1)
- Housing E.
- Power supply assembly circuit board SMP 20 I.
- Transformer SMU 31 U.
- Mains supply terminals T with fuse.
- Eye O for sealing.
- Tamper contact P.
- Cable inlet Y.
- Mounting holes for SMT 11 or SMR 11 circuit boards
(optional) Q.
- Space for battery R.
- Cover screws W.
8AA10427 - F0 - 09/04/2003 - UK - SNR 557773.0-001
s
Installation instructions
External power supply unit
SAP 20
SLP 20 UK
20 800 225.0-010
2
Fig. 2
Fig. 3
A
Fig. 4 B
A
3.2.1 Power supply unit circuit board SMP 20 (Fig. 2)
- Transformer terminal Y 20V, 50Hz.
- Relay R which can be programmed from the central
control unit.
- Four +12 V voltage outputs W (+1, +3, +4, +6) each of
which is protected by a fuse (F2 to F5).
- Output E for mains supply indication (not fused).
- E-Bus connection to central control unit Q (B1-, B2, B3,
B4+). B4+ is protected by fuse F1.
- Pre-wired battery terminal T is protected by fuse F6.
- Address key P.
- LED { flashes if the E-Bus communication is correct.
- LED I for mains supply indication.
- The adjustment of potentiometer U ,O must not be disturbed.
3.3 Fit housing (Fig. 3)
1 - Mark the drilling position for the four mounting holes Q.
2 - Drill the holes and insert plugs.
3 - Screw in the screws leaving approximately 1.5 cm
proud (Fig. 3B).
4 - From the back, snap the spacers into the slots provided
at the four mounting holes (Fig. 3A).
5 - Pass the connecting cable through the opening Wprovi
ded and hang the housing base on the screws
6 - Tighten the mounting screws.
3.4 Fit circuit boards SMT 11 or SMR 11 "optional"
(Fig.4)
1 - Engage the mounting studs (provided with the circuit
boards) in the holes provided (Fig. 4A).
2 - Fit circuit boards (Fig. 4B).
Fuses
No. Terminal Function Type
F1 B4+ E-Bus F2AL
F2 +1 +12V F2AL
F3 +3 +12V F2AL
F4 +4 +12V F2AL
F5 +6 +12V F2AL
F6 + Batt. Battery T2AL
Q
Q
W
1,5 cm
B
Ø 6 mm
S6
4,5 x 45
3
Fig. 5
Fig. 6
Fig. 7
Fig. 8
4. Wiring
The terminals can be seen in Fig. 2 or in the wiring diagram
glued to the inside of the housing cover.
4.1 Mains supply (Fig. 5)
The external mains supply should preferably be connected
through a separate unswitched fused spur.
Cable type 3 x 1.5 mm2is recommended.
1 - Ensure that the mains supply terminal is de-energised.
2 - Remove mains supply fuse F7 Q.
3 - Check the protective conductor connection to the base
of the housing.
4 - Connect the mains to the mains supply terminals
(neutral N, live L and earth).
5 - Secure the cable to the clips in the rear wall using
cable ties.
4.2 E-Bus (Fig. 6)
Cable type 24 AWG 7 x 0.2 mm is recommended. The total
length of the E-Bus cable must not exceed 500 m.
The power supply unit circuit board SMP 20 and the options
(SMT 11, SMR 11) must be connected to the central control unit
via the E-Bus (B1-, B2, B3, B4+). It may be routed in parallel
to other accessories. If shielded cable is used, the shield may
not be laid on the housing of the SAP 20. The shields of all
cables must be connected at one point, e.g. at one of the NC
terminals of SMT 11 or SAR 11.
4.3 Tamper contact (Fig. 7)
The tamper contact of the housing must be connected to the
SMT 11 circuit board. Refer also to the installation instruc-
tions for the SMT 11.
4.4 Back tamper contact
For the back tamper use the option SMZ 91.
5. Powering up the system
5.1 Switch on the 240V mains supply
1 - Ensure that everything is correctly connected and wired
and then switch on the mains supply.
2 - Refit fuse F7.
5.2 Connect battery (Fig. 8)
1 - Place the battery in the space provided in the base of the
housing.
2 - Connect the pre-installed battery cables (- blue, + red).
E-Bus from
the central control unit
E-Bus to other
accessories
B4+
B3
B2
B1-
4
Fig. 9
6. Close and seal the housing (Fig. 9)
1 - Glue the circuit diagram to the inside of the cover Q.
2 - Engage the cover in the retainer.
3 - Connect the earthing lead W to the cover.
4 - Lightly lift and close the cover.
5 - Tighten cover retaining screws.
6 - Use eye E to seal.
When the cover is opened again, e.g. for servicing, there is no
need to remove it completely. After slackening the screws, the
cover can be lifted gently, swung downwards and suspended
in the base.
7.Technical data
Mains voltage 240V, 50Hz
Power consumption (230V) 230mA
Mains supply fuse 500 mA slow-blowing
Output power 12VDC, 2.3 A
Max. ripple at 2.3 A 60mVpp
Relay, single-pole changeover 48V, 5A
Battery min V-2 (optional) 12V, 24Ah
Operating temperature -10°C to +40°C
Steel housing 1.5 mm
Dimensions in mm H 500 x W 365 x D 133
Safety class IP 30
Environmental class II
Weight without battery 8.4 kg
The right to make technical changes to the described equipment
without prior notice is reserved.
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