26
Mounting and
connection of
acknowledge
module SWDM 3A1
In distributed systems or in applications where
SACO 64D4 is used as an independent annun-
ciator system, push-buttons are required for ac-
knowledging, resetting and testing purposes.
A convenient way of providing for the adequate
push-buttons is by using the acknowledge mod-
ule SWDM 3A1. The module,which contains
four push-buttons is fitted in front of the voltage
supply module on the left side of the SACO
64D4 rack. The module includes the wires re-
quired for connecting the push-buttons to the
external acknowledge inputs of the annunciator
unit.
The following push-buttons are included in the
module:
- SILENCE, reset of audible device (V2)
- ACK, acknowledge of alarm (V3)
- RESET, reset of alarm (V100)
- TEST, testing (V4)
A system including several SACO 641D4 units
needs one acknowledge module. The acknowl-
edge functions are transmitted to the other units
over flat cables SWIR 24…28 depending on the
number of racks.
S1
S2
S3
S4
128
129
130
131
132
Field contact voltage 48V
Audible alarm reset
Acknowledge
Reset
Annunciator module test
Fig 25. Connection diagram for the acknowledge module.
The acknowledge module SWDM 3A1 is
mounted in place of the cover plate in front of
the voltage supply module. The five connection
cables are brought straight through the rack
between the cover plate of the voltage supply
module and the first annunciator module,
through the opening between the rear panel and
the bottom edge of the mother PC-board, up
to the terminals inside the rear panel. The flat
terminals are connected as shown in the above
diagram.
FAULT
ON
PROGRAM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
TEST
RESET
ACK
SILENCE
FAULT
ON
PROGRAM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
FAULT
ON
PROGRAM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
FAULT
ON
PROGRAM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
SACO 16D2
SACO 16D2
SACO 16D2
SACO 16D2
Acknowledge module SWDM 3A1
Fig 26. Acknowledge module SWDM 3A1 in the SACO 64D4 rack.