Det-Tronics EQP Fire and Gas Detection/Releasing System - Manual (Page 49)

14.1 3-30 95-8533
Connector P4, Terminals 13 to 24
Terminals A, B & C
Channels 5 to 8 Input / Output Terminals
Refer to individual wiring configurations for terminal
descriptions. Only channel 1 is shown in each
diagram. The information is typical for channels 2-8.
Unsupervised Input
Connect external system wiring to the appropriate
terminals on the terminal block. See Figure 3-26.
The input to the EDIO consists of one or more normally
open or normally closed switches. An EOL resistor is
not required.
Make no connection to “+ Supply” terminal.
Supervised Input (IDC) Open Circuit Supervision
Connect external system wiring to the appropriate
terminals on the terminal block. For Class B wiring,
see Figure 3-27. For Class A wiring, see Figure 3-28.
Note that two channels are used for one circuit when
using Class A wiring.
The input to the EDIO module consists of one or more
normally open switches, with a 10 K ohm, 1/4 watt
EOL resistor in parallel across the last switch.
Make no connection to “+ Supply” terminal.
Supervised Input Open and Short Circuit Supervision
Connect external system wiring to the appropriate
terminals on the terminal block. For Class B wiring,
see Figure 3-29. For Class A wiring, see Figure 3-30.
Note that two channels are used for one circuit when
using Class A wiring. Both wiring configurations
provide indication of open and short circuit fault.
The input to the EDIO module consists of normally
open switches, with a 10 K ohm, 1/4 watt EOL resistor
in parallel across the return channel, and a 3.3 K ohm,
1/4 watt resistor in series with each switch.
NOTE
If using more than one switch, the first active
condition (switch closed) must be latched. Any
subsequent closed switch will indicate a short
circuit fault condition.
Make no connection to “+ Supply” terminal.
Input — Deluge and Pre-Action
The initiating device circuit(s) for use with the deluge and
pre-action system configuration must use Class A wiring
or be wired within 20 feet and in conduit from the EDIO.
+ SUPPLY A
IN– / OUT+ B
COMMON C
1
2
3
EOL
RESISTOR
10 K Ω
C2091
Figure 27—Supervised Input Configuration – Class B
+ SUPPLY A
IN– / OUT+ B
COMMON C
1
2
3
EOL
RESISTOR
10 K Ω
INLINE
RESISTOR
3.3 K Ω
C2092
Figure 3-29—Supervised Input Configuration
for Opens and Shorts – Class B
+ SUPPLY A
IN– / OUT+ B
COMMON C
1
2
3
+ SUPPLY A
IN– / OUT+ B
COMMON C
4
5
6
B2291
EOL
RESISTOR
10 K Ω
Figure 3-28—Supervised Input Configuration – Class A
+ SUPPLY A
IN– / OUT+ B
COMMON C
1
2
3
+ SUPPLY A
IN– / OUT+ B
COMMON C
4
5
6
B2292
INLINE
RESISTOR
3.3 K Ω
EOL
RESISTOR
10 K Ω
Figure 3-30—Supervised Input Configuration
for Opens and Shorts – Class A
+ SUPPLY A
IN– / OUT+ B
COMMON C
1
2
3
C2090
Figure 3-26—Unsupervised Input Configuration