Honeywell Midas User Manual page 31

Diagram 4-14. Midas
J4
+supply
INT EXT
NC
Relay1
J1
NO
11
NC
Relay2
10
J2
NO
9
NC
Relay3
J3
NO
EXT INT
-supply 8
J5
7
6
5
4
3
2
+24 V
1
COM
RJ-45
MIDAS
Simplified Internal Schematic
J4
INT EXT
2
4-20 mA
+
Controlled
Internal
Current Source
Power
Loads
J5
-
EXT INT
1
to 5704 4-Wire Connection
®
}
}
}
DC
PWR
Shielded Cable
ON
SW
OFF
Note:
The above schematic shows the MIDAS connected
to channel 1 on the 5704 card. The terminal numbers
for all four channels are as follows:
MIDAS Function
Midas Terminal Number
System 57 Function
Color in this figure
5704 Channel 1 Terminal
5704 Channel 2 Terminal
5704 Channel 3 Terminal
5704 Channel 4 Terminal
System 57
11
Relay/Field
Interface Card
+
15
24
VDC
-
10
9 17
4-15
Midas Gas Detector
®
Sieger System 57
Quad Relay Interface Card
05704-A-0121
with
4 Channel Control Card
05704-A-0145
(S) 15
(01) 17
+
24
VDC
-
Loop + Loop -
11 10
S 01
Brown Blue
15 17
16 18
21 23
22 24
5704 Control Card
+
Loop
24
Supply
VDC
-
Sense
Resistor
Not optically isolated
36