SensAlarm
Flex
–
Universal Gas Detection System
P a g e
54 | 82
Sensidyne Document No. 360-0257-01 (Rev A)
6.1.7.
Once the 4 to 20mA output has been forced to the selected value, check the multimeter
display. If adjustment is needed, use the Up / Down Arrows until the multimeter display
indicates the proper value, and select ENTER to save the setting.
1mA Output = 10mV multimeter display
4mA Output = 40mV multimeter display
12mA Output = 120mV multimeter display
20mA Output = 200mV multimeter display
NOTE: The Gas Monitor must be terminated to a DCS with a load resistor between 100 and 500
ohms for the multimeter to display the millivolt (mV) representation of the milliamp (mA)
output.
6.1.8.
Repeat the procedure for the remaining mA outputs, selecting ENTER to save the
adjustments for each once completed. NEXT PAGE will take the user to the Channel 2
Sensor Interface if included, which should be confirmed too.
NOTE:
The “Counts” can be noted as a rough adjustment required for the other Sensor Interface
Channel or additional Gas Monitors. The Counts values for each mA output can be used
to quickly adjust other Sensor Interface Channels, but the multimeter mV displayed value
should be confirmed for each and fine-tuned accordingly.
6.2. Communication Setup
SensAlarm Flex a standard 4 to 20mA output per Sensor Interface Channel that is located in the bottom
left hand side of the enclosure. CH-1 represents the Left Sensor Interface, and CH-2 the right. CH-2 only
functions when SensAlarm Flex is configured with the optional second Sensor Interface. Also included is
both Modbus TCP and RTU (RS-485) as standard Gas Monitor inclusions. Both are easily accessible
and are located on the right of the Main PCA. Modbus TCP accepts a standard RJ-45 Ethernet cable.
Modbus RTU can be wired in half duplex (2-wire) or full duplex
(4-wire).
This section covers the following
Communication Setup
submenu functions.
6.2.1.
From the System screen, use the Arrows to highlight System Configuration, and select
ENTER.
Summary of Contents for SENSALARM FLEX
Page 1: ...Document No 360 0257 01 Rev A ...
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