Spectrex 20/20CTIN-CTIP Flame Detector - Manual (Page 27)

Spectrex Inc. - SharpEye TM CCTV Model Flame Detector Manual – TM 788100, Rev. A January 2005
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E. Electrical outputs
• Dry Contact Relays:
Table 11: Contact Ratings
Relay
Name Type Normal
position Maximum Ratings
Alarm SPDT N.O. N.C. 2A at 30VDC or 0.5A at 250 VAC
Fault * SPST N.C. 5A at 30VDC or 250 VAC
* The FAULT relay will be normally energised closed during Normal operation of the
detector. The contact will open at ‘Fault’ condition or low voltage.
• 4-20mA Current Output:
Terminals 11 and 12:
FAULT 0 + 0.5mA
BIT FAULT 2mA±10%
NORMAL 5mA±10%
WARNING 10mA±5%
ALARM
15mA±5%
• Communication Network:
The detector is equipped with an RS-485 communication link that can
be used in installations with computerized controllers.
The communicator protocol is compatible with the Modbus
communicator protocol.
• This protocol is a standard and widely used.
• It enables continuous communication between a single standard
Modbus controller (Master device) and a serial Network of up to 247
detectors.
• It enables connection between different types of Spectrex detectors
or other Modbus devices to the same Network.
• CCTV Output
The video output is a standard port with two options:
• Detector model No. 20/20 CTIN is a NTSC version
• Detector model No. 20/20 CTIP is a PAL version
The output can be connected to standard video accessories such as a
switching box.