Table 2.1.
Functions performed at the outputs:
CONTACT OUTPUTS
Z1 ZONE
Z2 ZONE
FAILURE
A1
A2
A1
A2
UNIT
STATUS
Terminal
no.
Pair
NO-COM
(17-16)
Pair
NC-COM
(18-16)
Pair
NO-COM
(05-04)
Pair
NC-COM
(06-04)
Pair
NO-COM
(08-07)
Pair
NC-COM
(09-07)
Pair
NO-COM
(11-10)
Pair
NC-COM
(12-10)
Pair
NO-COM
(14-13)
Pair
NC-COM
(15-13)
NORMAL
Opening Shorting Opening Shorting Opening Shorting Opening Shorting Opening Shorting
A1 Z1
Opening Shorting Shorting Opening Opening Shorting Opening Shorting Opening Shorting
A2 Z1
Opening Shorting
Shorting
*
OPENING*
Shorting Opening Opening Shorting Opening Shorting
A1 Z2
Opening Shorting Opening Shorting Opening Shorting Shorting Opening Opening Shorting
A2 Z2
Opening Shorting Opening Shorting Opening Shorting
Shorting
*
OPENING*
Shorting Opening
version MDP-4(8,16).(B,ZB) - status of outputs according to the actual MDP status
MDP
power
FAILURE
Shorting Opening
version MDP-4(8,16).(-,A,Z,ZA) - status of outputs as in NORMAL state
DETECTOR
FAILURE
Shorting Opening
status of outputs acc. to the current unit status or memory of alarm state from the
damaged detector until manual reset of MD
12V= ALARM OUTPUTS, I
out
<200mA
Z1 ZONE
Z2 ZONE
UNIT
STATUS
Terminal
no.
A1
(56-57)
A2
(58-59)
VALVE1
(19-20)
A1
(60-61)
A2
(62-63)
VALVE2
(22-21)
NORMAL
no voltage
no voltage
no voltage
no voltage
no voltage
no voltage
A1 Z1
12VDC no
voltage
no voltage
no voltage
no voltage
no voltage
A2 Z1
12VDC 12V=
12V impulses
no voltage
no voltage
no voltage
A1 Z2
no voltage
no voltage
no voltage
12VDC no
voltage
no voltage
A2 Z2
no voltage
no voltage
no voltage
12VDC *
12VDC
12V impulses
MDP
power
FAILURE
version MDP-8(16)(B, ZB) - according to the current status of MDP; other versions - no voltage
DETECTOR
FAILURE
status of outputs acc. to the current unit status or memory of alarm state from the damaged detector until manual reset
of MDP
* - forced by status of detectors at MDP inputs
Description of MDP statuses:
Activation of outputs from a specific zone occurs when the number of detectors indicating an alarm of one
type is equal or bigger than a
minimum number of L
min
alarms
, specified in the user menu in “Output Off
- logic” tab (1 or 2 detectors can be selected).
NORMAL state
– number of alarms of one type at detectors’ inputs does not exceed
L
min
(no designation
on LCD screen); only green power light lit on,
A1 Z1 – alarm A1 in zone 1; at least L
min
detectors
of Zone 1 indicate exceeding of A1 concentration
threshold (designation “A1Z1” on LCD),
but no less than L
min
detectors
in that zone indicate
exceeding of A2, ALARM1 light is active,
A1 Z2 – alarm A1 in zone 2; at least L
min
detectors
of Zone 2 indicate exceeding of A1 concentration
threshold (designation “A1Z2” on LCD),
but no less than L
min
detectors
in that zone indicate
exceeding of A2, ALARM1 light is active,
A2 Z1 – alarm A2 in zone 1; at least L
min
detectors
of Zone 1 indicate exceeding of A2 concentration
threshold (designation “A2Z1” on LCD), ALARM2 light active, generation of two impulses closing
Zone 1 valve (designation “VAL1” on the LCD screen (if applicable),
A2 Z2 – alarm A2 in zone 2; at least L
min
detectors
of Zone 2 indicate exceeding of A2 concentration
threshold (designation “A2Z2” on LCD), ALARM2 light active, generation of two impulses closing
Zone 2 valve (designation “VAL2” on the LCD screen (if applicable),
MDP power supply FAULT -
all lights and display disabled (in B, ZB versions green light is flashing and
the FAULT yellow light is lit),
DETECTOR FAULT -
the FAULT yellow light is on, “FAULT” word is active on the screen and the “PR” or
“S” symbol for the damaged detector(s)
Statuses for both zones are displayed independently. Other combinations of outputs’ states should be treated as
an emergency.
MDP-4(8,16)… Instruction Manual
edition 6PU63en
©gazex’2011 v1101
Page 6
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