SensAlarm
Flex
–
Universal Gas Detection System
P a g e
28 | 82
Sensidyne Document No. 360-0257-01 (Rev A)
2.3.4.2.
Thread all relay conductors through the single large Ferrite Bead supplied with the
Gas Monitor.
2.3.4.3.
Remove the terminal jack from the Relay PCA and terminate the conductors to the
jack. Refer to the below figure for location.
2.3.4.4.
Secure the jack into the Relay PCA.
2.3.4.5.
Repeat as necessary for the additional relays
and secure the enclosure cover.
2.3.5. Modbus
2.3.5.1.
SensAlarm Flex offers both Modbus TCP and RTU (RS-485) standard. Modbus RTU
accommodates both two (2) and four (4) wire half-duplex and full-duplex
infrastructures. Dip switches configure end of line terminating resistors, without the
incorporation of these manually. The Modbus wire termination jacks are located on
the Main PCA at the top right hand of the enclosure. Refer to the below figure for
wire termination and dip switch setting details.
2.3.5.2.
Wire Recommendations
20-24 AWG Twisted Pair, Overall Shielded
o
2 Wire - Single Pair
o
4 Wire - Two Pair
Belden 9501, 9502, 8451, 8761, 1419A
Alpha Wire 5471C, 5472C
Normally De-energized
A (NO)
COM
B (NC)
No Alarm
Summary of Contents for SENSALARM FLEX
Page 1: ...Document No 360 0257 01 Rev A ...
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