Det-Tronics EQP Fire and Gas Detection/Releasing System - Manual (Page 55)

14.1 3-36 95-8533
Supervised Input (IDC) Open Circuit Supervision
Class B
Connect external system wiring to the appropriate
terminals on the DCIO terminal block. See Figure
3-40.
The input to the DCIO module consists of one or
more normally open switches, with a 10K ohm, 1/4
watt EOL resistor in parallel across the last switch.
NOTE
No connection should be made to the “+ Supply”
terminal.
Supervised Input (IDCSC) Open and Short Circuit
Supervision
(Three state – open, switch closure, and short)
Class B
Connect external wiring to the appropriate terminals
on the DCIO terminal block. See Figure 3-41.
Indication of short circuit fault is provided.
The input to the DCIO module consists of a normally
open switch, with a 10 K ohm, 1/4 watt EOL resistor in
parallel across the switch, and a 3.3 K ohm, 1/4 watt
resistor in series with the switch.
NOTE
No connection should be made to the “+ Supply”
terminal. For correct operation, only one input
switch can be used per channel.
Supervised Output Notification (Horns and Strobes)
Supervised Outputs for Open & Short Circuits
Class B
Connect external wiring to the appropriate terminals
on the DCIO terminal block. See Figure 3-42.
The output of the DCIO module supervises the
notification circuit by reversing the polarity of the
monitoring circuit.
NOTE
Polarity MUST be observed when connecting
the notification device.
It is critical to use a notification device approved for
fire alarm notification. These devices are polarized
and do not require the use of an external diode for the
supervision of the circuit. Wire one or more notification
devices to the output, with a 10 K ohm, 1/4 watt EOL
resistor in parallel across the last device.
NOTE
No connection should be made to the “+ Supply”
terminal.
Each output channel is individually activated for
response pattern:
– continuous output
– 60 beats per minute
– 120 beats per minute
– temporal
– supervisory
– timed
– trouble.
+ SUPPLY A
IN– / OUT+ B
COMMON C
1
2
3
EOL
RESISTOR
10 K Ω
Figure 3-42—Supervised Output Configuration (Notification)
+ SUPPLY A
IN– / OUT+ B
COMMON C
1
2
3
EOL
RESISTOR
10 K Ω
INLINE
RESISTOR
3.3 K Ω
B2092
Figure 3-41—Supervised Input Configuration (Opens and Shorts)
+ SUPPLY A
IN– / OUT+ B
COMMON C
1
2
3
EOL
RESISTOR
10 K Ω
B2091
Figure 3-40—Supervised Input Configuration