PIETRO FIORENTINI MODUS A, Technical Manual

Page: 14 / 25

MT339-I Rev.0.3 08/04/2022
14 - 25
Document classified as: 2 - Company Confidential
6 Installation
It is NOT sufficient for a device to be intrinsically safe for it to be connected to associated equipment. It is
necessary that a qualified technician or a body in charge proceed with the verification of the system and
issue of suitable certification proving the compatibility between the electrical safety parameters possessed by both
devices.
The essential safety requirements against the risk of explosion in classified areas are established by the European
Directives 2014/34 / EU of 26 February 2014 (for equipment) and 1999/92 / EC of 16 December 1999 (for plants).
The criteria for the classification of areas with risk of explosion are given by the EN60079-10 standard.
The technical requirements of electrical systems in classified areas are given by the EN60079-14 standard.
6.1 MODUS clamps
The replacement of the pressure or temperature transducer is not allowed.
Opening the lid removes the metric seals
.
Refer to chapter 8 for the characteristic parameters of intrinsically safe circuits
.
Figure 5: MODUS clamps
Auxiliary inputs AIN1, AIN2 accept analog signals from galvanically isolated instruments. Refer to Chapter
8 for safety parameters for electrical coordination.
The digital inputs from number 1 to number 8 provide for the application of a voltage-free signal, inputs
DI9 and DI10 can also accept a voltage signal.
The RS485 expansion line can be used for connection to a galvanically isolated equipment.
The digital outputs provide four open collector channels. The devices to which the connection is made
must be galvanically isolated.
Clamp. DEN. FUNCTION Clamp. DEN. FUNCTION Clamp. DEN. FUNCTION
M3
GND Ground
M4
GND Ground
M3
DO1+ Digital Output 1 - positive
GND Ground V CPU CPU Power Supply DO1- Digital Output 1 – negative
DI1 Digital Input 1 V MDM GSM Modem Power
Supply DO2+ Digital Output 2 - positive
DI2 Digital Input 2 485 + RS485 LINE+ DO2- Digital Output 2 - negative
DI3 Digital Input 3 485 - RS485 LINE- DO3+ Digital Output 3 - positive
DI4 Digital Input 4 DO3- Digital Output 3 - negative
DI5 Digital Input 5 DO4+ Digital Output 4 - positive
DI6 Digital Input 6 DO4- Digital Output 4 - negative
DI7 Digital Input 7
DI8 Digital Input 8
DI9 Digital Input 9
DI10 Digital Input 10
Table 8: Description of the available clamps