PIETRO FIORENTINI M-LOG Plus, Technical Manual

Page: 13 / 22

MT334-I Rev. 0.3 08/04/2022
13 - 22
Document classified as: 2 - Company Confidential
PSW3 Piezoresistive Pressure Sensor 3 – input power – negative
M3
GND Ground
GND Ground
DI1 Digital Input 1
DI2 Digital Input 2
DI3 Digital Input 3
DI4 Digital Input 4
DI5 Digital Input 5
DI6 Digital Input 6
DI7 Digital Input 7
DI8 Digital Input 8
DI9 Digital Input 9
DI10 Digital Input 10
M4
GND Ground
V CPU CPU Power Supply
V MDM GSM Modem Power Supply
485 + RS485 LINE+
485 - RS485 LINE-
M3
DO1+ Digital Output 1 - positive
DO1- Digital Output 1 – negative
DO2+ Digital Output 2 - positive
DO2- Digital Output 2 - negative
DO3+ Digital Output 3 - positive
DO3- Digital Output 3 - negative
DO4+ Digital Output 4 - positive
DO4- Digital Output 4 - negative
Table 3: Description of the available clamps
6.2 Prescaler
Clamps DI9 and DI10 (M3-11, M3-12) have two independent prescalers that can be enabled via selector
LK3 and LK2 respectively.
In this mode the frequency of the input pulses is divided by a configurable factor from 8 to 4096, this
allows to extend the range of input pulse frequencies up to 12KHz.
The prescalers are configured by the LK4 and LK5 selectors; the available options are shown in Tables 4
and 5.
Figure 6: Selectors for enabling and configuring the prescalers for digital inputs DI9 and DI10
LK3 LK5 Prescaler
Frequency
Max
LK2 LK4 Prescaler
Frequency
Max
A-B - - 3 Hz A-B - - 3 Hz
B-C
A 1 3 Hz
B-C
A 1 3 Hz
B 8 24 Hz B 8 24 Hz
C 64 192 Hz C 64 192 Hz
D 512 1.5 KHz D 512 1.5 KHz
E 4096 5 KHz E 4096 5 KHz
Table 4 - DI9 Configuration Table 5 - DI10 Configuration