Environmental Monitoring System (EMS-01) Instruction Manual
18
4
Configuration
Figure 15
: Rear of EMS-01 Showing Sensitivity and DIP Switch Settings
4.1
DIP Switch Settings
DIP Switch setting changes take effect immediately unless the system is in a state of reporting a
fault or leak (i.e.
Cable Fault
or
Leak Mode
), or is in
Test
or
Engineering Mode
(see
Section 5
).
The unit should be
powered down
before settings are adjusted and then re-booted.
The unit should be powered OFF before setting the
DIP Switch array
according to the desired configuration:
Figure 16:
DIP Switch Assignments and Default Settings (bottom of unit)
DIP Function
Description
Default
1
Unit sounder
Enabled / disabled
ON
2
Disable Relay Latch
When enabled, alarm relays are latched in accordance with the
real-time alarm condition of the unit; i.e. no user
acknowledgement of an alarm is required to unlatch the relay
once the unit has returned to a healthy condition.
OFF
3
1 Minute Alarm Delay The unit will delay entering alarm mode for
60 seconds (DIP 3)
or
300 seconds (DIP 4)
after an alarm condition occurs. If the alarm
condition is cleared within the delay period (i.e. 1 or 5 minutes),
the unit will resume normal operation with no alarm.
4
5 Minute Alarm Delay
5
DISABLED
6
Timed Latch
The unit will latch all outputs for a period of 10s every 28.5 days
after last power up. This feature is designed to mitigate against
solenoid valve seizure, and also offers a communication health
check between the unit and any other connected system.
OFF
7
DISABLED
8
12/24V DC Out
Selector
This output provides a constant DC output to power a connected
device if required. The output is limited to 250mA maximum.
OFF
(12V)
Table 3:
DIP Switch Assignments and Default Settings
Sensitivity
Measure
Sensitivity
Trimmer
DIP Switches
1 2 3 4 5 6 7 8
ON
OFF
DIP Switch numbers
