VOICECOM USER MANUAL ISSUE 4
-8-
Digital Inputs
The controller has 14 digital inputs labelled DI1 to 12, PSR1 and PSR2. A 24VDC supply is required to assert these
inputs. The negative side of this supply is connected to the 0V DI terminal. The positive side of the supply is applied
to the digital input as required.
Inputs 1 to 12 are used for message initiation and are edge triggered. The voice message will not stop when the
24VDC is removed, nor will the message repeat if the 24VDC is held. These inputs will remain active for the duration
of the voice message. Inputs PSR1 and PSR2 are used for pre-start alarm initiation and are active for as long as the
input is asserted. The digital inputs can be wired in several configurations depending on the voice message initiation
mode chosen. The connection options are listed in Table 1, Table 2 and Table 3. The three modes are as follows:
1.
Digital Inputs/Modbus
In this mode, asserting digital inputs 1 to 12 plays messages 1 to 12 respectively. Messages 13 to 255 are
initiated via the Modbus communication link.
2.
Strobe
In this mode all messages, 1 to 255, can be played by setting up the voice message address as an eight bit
binary number using digital inputs 1 to 8 and then using digital input 9 as a strobe to initiate that message.
This allows relay logic to initiate voice messages if no Modbus communication facility is available.
3.
Modbus
In this mode all messages, 1 to 255, are played via Modbus. Asserting digital inputs 1 to 12 will not initiate
voice messages.
Figure 3 - VCA Connections
1
2
3
4
5
6
7
8
9
+24V
DO4
DO3
DO2
DO1
PSR2
PSR1
DI12
DI11
DI10
DI9
DI8
DI7
DI6
DI5
DI4
DI3
DI2
DI1
DI 0V
485 -
0V 485
485 +
232 TX
0V 232
232 RX
PSC2
PSC1
NO2
COM2
NC2
NO1
NC1
COM1
110Vac
110Vac
AUDIO +
AUDIO -
COM
KP8
KP7
KP6
KP5
KP4
KP3
KP2
KP1
0V 1
Audio 1
Call 1
-V Line 1
0V 1
-V PS1
I.S. EARTH
EARTH
0V 2
Audio 2
Call 2
-V Line 2
0V 2
-V PS2
LINE 2
IS EXT KPD IS LINE I/F
COMMS
DIGITAL I/O
RELAY/PWR
LINE 1
Содержание VAA
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