Contatto
ModKB
Installation
The wiring diagram in Figure 1 shows the connection to be
executed between ModKB module and the bus, the
keypad, the electrical door lock, the input contacts and the
optional LEDs. For details about the connection of the third
party keypad refer to the manufacturer technical sheet.
ModKB module features a green LED near to the bus ter-
minal lock, lighted when the module is properly supplied.
The contacts connected to the inputs in Figure 1 are NO
type only to give an example, being possible to configure
each input according to the desired NO/NC logic (see in the
following pages of this manual).
The following table gives some hints about the section of
the wires to be used for the connections and the suggested
maximum length.
Connection
Suggested wire
Bus
4 x 2.5 mmq not shielded
Inputs
0.5 mmq, MAX 25mt
LEDs
0.22 mmq, MAX 25mt
Door lock
0.5 mmq
Keypad
5 x 0.5mmq, MAX 15mt
Method for the access control
The access control is based on the entering of a PIN code
through the keypad.
The check of the entered PIN code, executed by ModKB
module, is performed according to the rules described in
the following.
The PIN codes to be enabled (up to 30) can be freely
defined during the setting up and transferred to the memory
of ModKB through the
Contatto
bus.
The first 8 or 16 bits (depending WIEGAND 26 or 32 re-
spectively has been chosen) transmitted by the keypad cor-
responds to the SITE code set on the keypad itself; this
code uniquely identifies the keypad connected to a given
ModKB module. The next transmitted 16 bits corresponds
to the entered PIN code, thus making a number in the
range 00001 to 65535.
ModKB module features a non-volatile memory containing
30 blocks of information, each one related to a different
PIN code that must be granted; the same SITE code set in
the keypad must be stored in the ModKB memory too.
DUEMMEGI
s.r.l. - Via Longhena, 4 - 20139 MILANO
Tel. 02/57300377 - Fax 02/55213686 –
www.duemmegi.it
Rel.: 1.1 July 2012
Page 2 of 6
Figure 1: Connection diagram
+24V
BUS
0V
L1
L2
Ve
DOOR
LOCK
21 22 23 24 25 26 27 28 29 30 31 32
ON
Contatto
DUEMMEGI
MILANO-ITALY
ADDRESS
+2
4V
0V
L1
L2
P
13 14
16 17
15
Access controller
Power supply 24V= ±25% / 40mA
MODKB
1
2
KB
I1 I2 C O1 O2 C
12V LD
D1 D0 C
1
2
3
4
5
6
7
8
9
*
0
#
HOME AND BUILDING AUTOMATION
Relationship
terminals ↔ keypad:
21 ↔ 12V for keypad
22 ↔ keypad LED control
23 ↔ do not connect
24 ↔ Wiegand data '1'
25 ↔ Wiegand data '0'
26 ↔ common
O1 = code OK
O2 = code NOK
