EDS - TECHNICAL INSTRUCTIONS
5
4 - CABLE CONNECTIONS
4.1
- the low detector’s power consumption (20 mA with normally open alarm relay contact (NO) and 30 mA with
normally closed alarm relay contact (NC), allows to use small size sections cables. We suggest to use a shielded cable with
8 cond shield ( 2x0,75 mmq for power cond 6x0,22 mmq for the signal conductors) for a distance up to
1 Km. In such way it is possible to get a remote connection of the following signals:
• alarm relay contact (terminals C1-N1)
• turbulence (heat) alarm relay contact (terminals C2-N2)
• fault relay contact (terminals C3-N3)
• analog signal output (terminal SIG) - for level signal measurement from distance
The shield of the cable must be connected as in fig.14.
5 - ELECTRICAL CONNECTIONS AND INITIAL SETUP
5.1
- Connect the device cables as shown on the labels facing the terminal board. The given symbols indicate what follows:
•
(V+) - (V -)
- supply’s terminals 11 - 30 Vdc
•
(C1) - (N1)
- normally closed Alarm relay contact. The connection is valid when the detector is not in alarm state and JP2
jumper is in 2 - 3 position. If JP2 is positioned on 1-2 the contact results normally open. C1-N1 terminals are voltage free
•
(C2) - (N2)
- Turbulence alarm normally closed contact relay. Connection is valid when the detector is not in an alarm
state and JP3 jumper is in 2 - 3 position. If JP3 is positioned on 1-2 the contact results normally open. C2-N2 terminals
are voltage free
•
(C3)-(N3)
- normally closed Fault relay contact. Connection is valid when the detector is not in fault state and JP4
jumper is in 1 - 2 position. If JP4 is in 2-3 position the contact is normally open. C3-N3 terminals are voltage free.
Fault relay is normally powered (intrinsic safety)
•
(SIG)
- 0-5V analog output terminal. To use only during allignment.
5.2
-
Jumper Settings
JP1
- to enter/exit the optical alignment procedure. To activate the procedure of optical alignment JP1 must be in 2-3 (ON)
position. To deactivate the procedure of optical alignment JP1 must be in 1-2 (OFF) position.
• JP1 position 2-3 (ON).......alignment procedure ON
• JP1 posizione1-2 (OFF)... alignment procedure OFF
JP2 - JP3 - JP4
to set the output contacts respectively of Alarm relay, Turbulence relay(if present) and Fault relay to
normally closed NC or normally open NO (cap. 5.1) The RK100B(S)/RK200B(S) detector is normally factory preset
with normally closed NC contacts. For the Alarm relay the indication of JP2 is valid if JP7 is in OFF position.
JP5
- activate the Alarm Memory function or to deactivate that function (detector automatically resets alarm output)
• position 1-2 Alarm Memory OFF. When the detector gets out of alarm condition it automatically resets alarm output
• position 2-3 Alarm Memory ON. In case of alarm the detector’s alarm output persists until power supply is switched off
for at least 5 seconds
JP6
- microprocessor reset (SW reset)
JP7
- selection of Alarm relay operational mode : normally powered or not powered
