Spectrex 20/20U (UB) - UV Flame Detector - Manual (Page 52)

Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004
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2.1 Terminal Wiring
The detector contains a chamber consisting of a terminal block (Item 4). The
terminal block is labeled 1 to 6. (See Fig. No.10.)
Table 12. Terminals wiring options of the detector
Alarm Relay & 4-20mA Version
Option A (See Fig. No. 11)
Alarm & Fault Relays Version
Option B (See Fig. No. 12)
Power Supply
(Terminal Numbers 1, 2):Input power is
supplied to Terminal No. 1.RETURN is
connected to Terminal No. 2. Power Supply
(Terminal Numbers 1, 2):Input power is
supplied to Terminal No. 1.RETURN is
connected to Terminal No. 2.
Alarm Relay
(Terminal Numbers 3, 4):
The Alarm output is a NO. SPST
contact at Terminal Numbers 3 and 4.
The contacts are closed at Alarm
Mode.
Alarm Relay
(Terminal Numbers 3, 4):
The Alarm output is a NO. SPST
contact at Terminal Numbers 3 and 4.
The contacts are closed at Alarm
Mode.
4-20mA Output
(Terminal Numbers 5,
6): Terminal Numbers 5 and 6 are used
for analog, 4-20mA current output as
specified in paragraph 4.e
Terminal No. 5 is used as output Terminal.
Terminal No. 6 is used as input Terminal.
see appendix B for more details)
Fault Relay
(Terminal Numbers 5, 6):
The Fault output is NC. SPST contact
at Terminal Numbers 5 and 6. The
contacts are open at Fault condition.
Figure 11: OPTION A
Flame Detector Assembly - Wiring
Diagram (“de version”)
Figure 12: OPTION B
Flame Detector Assembly - Wiring
Diagram (“de version”)