D e s c r i p t i o n a n d o p e r a t i o n
9
MRBP.424321.001UM Version 1.0 27/01/2020
1.5
Device and principle of operation
1.5.1
EMI-SSD-
1M is able to connect 8 gas detectors simultaneously via «current loop» ana-
logue interface and
«Bell 202» («HART» protocol) digital interface or 32 gas detectors via the RS
-485
interface («Modbus RTU» protocol). In total up to 40 gas detectors can be connected to the device.
1.5.2
Data may be transferred to a higher level system via «RS
-
485» interface («M
odbus
RTU» protocol), via wireless communication standards «LoRa» и
«Bluetooth»
.
1.5.3
Data and events are archived on external SD card..
1.5.4
External circuits switching is carried out by 3 relays, shifting can be tuned.
1.5.5
EMI-SSD-1M channels tuning and configuration is carried out in control unit menu by
built-in key-pad and OLED-
display, as well as by «Bluetooth»
.
1.5.6
Battery CR2032 for internal clock continuous operation is installed in EMI-SSD-1M.
1.5.7
Latches for fixing the device on a DIN rail are on the rear cover.
1.5.8
Indication alarm and control elements are on the upper front surface:
- OLED-display allows visually track changes in the values of variables from connected sen-
sors, and display a custom menu.
- two LED indicators:
a)
«
Operation
»
(green)
–
indicates that device is turned on;
b)
«
Failure
»
(red)
–
lights up in case of set threshold exceeding or connected detectors fail-
ure.
-
piezoelectric radiator makes sound in case of set threshold exceeding or connect-
ed detectors failure.