Range; Configure Relays, Horn & Strobe Submenu; Relay Summary; Relay Mode - Macurco DVP-120 User Instructions

3.3.3.5

Range

The range for each sensor is the gas concentration that corresponds to the 20 mA signal level.
The default range values for the sensors are:
Carbon
Description
Monoxide
Range 200 ppm
3.3.4 Configure Relays, Horn & Strobe Submenu
There is a list of parameters for each relay in the system. The left and right cursor keys can be used to move from one relay, horn or
strobe to another and the up and down keys will scroll through the parameters for the particular relay, horn or strobe.
3.3.4.1

Relay Summary

This display example shows that Relay 1 is configured to operate Normally Off, with a turn on delay and a minimum on time.
Notice that the relay number, 1 in this example, is underlined. This indicates that the digit keys can be used to jump to a particular
relay, horn or strobe. The relays are numbers 1, 2 and 3; the horn is number 4 and the strobe is 5.
3.3.4.2

Relay Mode

This display example shows that relay 1 is configured to operate in the Normally Off mode. The relay modes are:
1
–
2
–
– 3
Relay mode 1 is a special case. This mode is only available on relay 1 and dedicates the relay to function as an alarm signal to a
subsequent alarm or monitoring panel. This mode forces the relay to Normally Off mode with no turn on delay or minimum on time. See
Section 3.1.4 for more detail regarding alarms
Fail Safe operation can be implemented by configuring a relay to operate Normally On, and wiring the circuit using the NC (normally
closed) contact. In this way, if the control panel looses power the relay will turn on the controlled device if it still has power.
3.3.4.3

Relay Turn On Delay

S e n s o r
R a n g e :
Nitrogen Combustible
Dioxide Gas
20 ppm 50%
R e l a y
D e l a y
Figure 3-30 Relay Summary
R e l a y
M o d e : 2
ALARM
Normally Off (default)
Normally On
R e l a y
( m m : s s )
Figure 3-32 Turn On Delay
0 1
2 0 0 p p m
Figure 3-29 Sensor Range
Hydrogen
Ammonia
Sulfide
100 ppm 50ppm
1 N o r m . O f f
O n , M i n . O n
1 N o r m . O f f
Figure 3-31 Relay Mode
1 D e l a y
0 1 : 0 0
27
C O
Carbon
Refrigerants
Dioxide
1,000 ppm 5,000ppm
O n
Oxygen
25%