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ED810 INSTRUCTION MANUAL 27-02-07 5
In addition to the zener barrier fuses (which cannot be replaced) each sensor is individually
fused on the base board PCB. If a sensor fails to respond the nominal 5V between blue and
brown terminals should be checked and the 160mA quick blow (F) changed if necessary.
Sensor Wiring: The Sensor cable should meet the following specification as listed in the
Zener Barrier (ZB1) certificate, see page 16. The total capacitance of the cable must not
exceed 6.8uF for EDS/C and EDS/P or 8.8uF for the EDF sensor. Also the inductance or
inductance to resistance (L/R) ratio should not exceed 0.06mH or 14uH/Ω respectively.
Typical output wiring: Fig 2 shows the terminal connections and Fig 3 shows typical wiring
of output functions. A fused 12V or 24V supply is available on terminal 2 for the operation
of low power sounders and beacons, the installation engineer must provide the links to
provide the required functions. Remember any sounders or beacons located in the Hazardous
Area must be certified Flameproof or Intrinsically Safe if fed via an external zener barrier
contact EDL for further information.
SOLENOID VALVE
It is important that only a 12VDC solenoid valve is used regardless of the input supply
voltage. Further more, solenoid valves must be exactly the same specification as the low
consumption type supplied by EDL to prevent damage to the circuit board components.
1 2 3 4
5 6
7
SOUNDER/BEACON
11
12
13 14
15
16 9
10
8
RELAY TO DRIVE
SHUT DOWN FUNCTIONS,
FANS, ETC.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20C
NO
NC
C
NO
NC
0V
FUSED 0/P
+VE I/P
NON
ALARM
ACCEPT
CONTACTS
A1 CONTACTS
HAZARDOUS
AREA
COMMON
-
+
VALVE
CONNECTIONS
12VDC EDL MODEL ONLY
NC
C
NO
A2 CONTACTS
NC
C
NO
FAULT CONTACTS
BL G/Y BR
(+VE) (-VE)(O/P)
BL G/Y BR
(+VE) (-VE)(O/P)
BL G/Y BR
(+VE) (-VE)(O/P)
BL G/Y BR
(+VE) (-VE)(O/P)
SENSOR 1 SENSOR 2 SENSOR 3 SENSOR 4
HAZARDOUS AREA WIRING
SAFE AREA WIRING
FIG 2
FIG 3
Relay contact rating: 2A at 240VAC Non Inductive