Omega CDTX-90 - Manual (Page 6)

page 4
Stand-alone application, no current loop used
Transmitter
Terminals
4
3
2
1
Sys. Pwr.
Loop -
Sys. Pwr.
Loop +
AUX
Power -
AUX
Power +
Power Supply
DC 12 - 24 V
Power
Supply
Power
Supply
Connection to a PLC with built-in power supply
PLC
Terminals
Power Supply
Ground
Power
Supply
Loop Input
4-20 mA
Loop Input
4-20 mA
Internal PLC
Connection
Connection to a PLC/Recorder, separate supply
PLC or Recorder
Loop Input
4-20 mA in
Loop Input
4-20 mA in
DC 12 - 24 V
Power
Supply
Power
Supply
Example: Two transmitters connected to PLC/Recorder
with separate power supply
Transmitter 2
4
3
2
1
DC 12 - 24 V
Power
Supply
Power
Supply
Transmitter 1
4
3
2
1
Transmitter
Terminals
4
3
2
1 Sys. Pwr.
Loop -
Sys. Pwr.
Loop +
AUX
Power -
AUX
Power +
Transmitter
Terminals
4
3
2
1 Sys. Pwr.
Loop -
Sys. Pwr.
Loop +
AUX
Power -
AUX
Power +
Sys. Pwr.
Loop -
Sys. Pwr.
Loop +
AUX
Power -
AUX
Power +
Sys. Pwr.
Loop -
Sys. Pwr.
Loop +
AUX
Power -
AUX
Power +
PLC or Recorder
Channel 1
4-20 mA in
Channel 1
4-20 mA in
Channel 2
4-20 mA in
Channel 2
4-20 mA in
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
AUX required for all CDTX-90 systems.
System Pwr
Loop -
System Pwr
Loop +
AUX
Power -
AUX
Power +
4
3
2
1
Sensr Gnd
(SHIELD)
Iso. Gnd
(BLACK)
Temp. IN
(WHITE)
Signal IN
(RED)
14
13
12
11
Relay 2
(NO)
Relay 2
(COM)
Relay 2
(NC)
Relay 1
(NO)
Relay 1
(COM)
Relay 1
(NC)
10
9
8
7
6
5
Terminals 5-10: Relay Outputs
• Two SPDT mechanical relays, programmable as:
• High or Low setpoint with adjustable hysteresis.
• proportional Pulse (400 pulses per minute maximum).
• May be disabled (Off) if not used.
Terminals 3 and 4: Loop Power
12-24 VDC ±10% system power
and current loop output.
Max. loop impedance:
50 Ω max. @ 12 V
325 Ω max. @ 18 V
600 Ω max. @ 24 V
Terminals 1-2: Auxiliary power
Provides DC power to sensor.
Required for all CDTX-90 systems.
CDTX-90-2 System Power/Loop Connections
CDTX-90-2 Terminal Connections
Terminals 11-14: Sensor input
11 is conductivity input
12 is temperature input
13 is the isolated signal ground
14 is the sensor earth ground