Alarm configurations, Figure 3 alarm configuration dip switches, Table 1 – Detcon Four Channel Relay Card User Manual
Page 8: 2 alarm configurations
4 Channel Relay Card
Four Channel Relay Card Instruction Manual
Rev.1.2
Page 4 of 8
Table 1 Examples of Alarm Configuration
S W 1 2
60 %
OFF
OFF
X
OFF
OFF
OFF
OFF
S W 1 1
55%
OFF
OFF
X
OFF
OFF
OFF
OFF
S W 1 0
50 %
O N
OFF
X
O N
OFF
OFF
OFF
S W 9
45%
OFF
OFF
X
OFF
OFF
OFF
OFF
S W 8
40 %
OFF
OFF
X
OFF
OFF
OFF
OFF
S W 7
35%
OFF
O N
X
OFF
O N
OFF
O N
S W 6
30 %
OFF
OFF
X
OFF
OFF
OFF
OFF
S W 5
2 5%
OFF
O N
X
OFF
OFF
OFF
O N
S W 4
2 0 %
OFF
OFF
X
O N
OFF
OFF
OFF
S W 3
1 5%
O N
O N
X
OFF
OFF
OFF
O N
S W 2
1 0 %
O N
OFF
X
OFF
OFF
OFF
O N
S W 1
E N
O N
O N
OFF
O N
O N
O N
O N
M eaning
Enabled,
ALM1=10%,
ALM2=15%,
ALM3=50%
Enabled,
ALM1=15%,
ALM2=25%,
ALM3=35%
Disabled,
input
ignored
Enabled,
ALM1=20%,
ALM2=50%,
ALM3 not used
Enabled,
ALM1=35%,
ALM2 not used
ALM3 not used
Enabled,
no alarms
enabled,
fault relay is
activated
Enabled,
too many
levels
enabled,
fault relay is
activated
The 4-20mA input from ‘Enabled’ channels is monitored by the controller. If the input on a channel is less
than 2.2mA, the fault relay is activated. The fault relay is also activated if a channel is enabled, but no alarm
levels or too many alarm levels have been enabled.
If a channel is disabled, its 4-20mA input is not
monitored.
3.2
Alarm Configurations
The alarm relays for alarms 1, 2, and 3 each have a DIP switch bank with three switches that are used to
configure the relays.
The Fault relay has a DIP switch with one active switch that controls the fault
configuration. Alarms 1, 2, and 3 can be configured as Silencable, Non-Silencable, Latching, Non-Latching,
Energized, or Non-Energized. The Fault relay can only be configured as Latching or Non-Latching. Each
relay provides the customer with a set of dry contacts. The contacts are Common, Normally Open, and
Normally Closed, labeled ‘C’, ‘NO’, and ‘NC’ respectively.
ON
OFF
FAULT
ALARM 1
Silencable
Latching
Energized
Latching
Not Used
ON
OFF
ALARM 2
Silencable
Latching
Energized
ALARM 3
Silencable
Latching
Energized
Figure 3 Alarm Configuration DIP Switches