Omega CDTX-90 - Manual (Page 7)

page 5
Sensr Gnd
(SHIELD)
Iso. Gnd
(BLACK)
Temp. IN
(WHITE)
Signal IN
(RED)
14
13
12
11
Output 2-
Output 2+
Output 1-
Output 1+
10
9
8
7
Loop 2-
Loop 2+
System Pwr
Loop -
System Pwr
Loop +
AUX
Power -
AUX
Power +
6
5
4
3
2
1
Terminals 7-10: Open-collector Outputs
•Two transistor outputs, programmable
as:
• High or Low setpoint with adjustable
hysteresis
• proportional pulse (to 400 pulses per
minute maximum)
• May be disabled (Off) if not used
Terminals 3-6: 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
1
Internal open-collector
output circuit
Isolation
15 W
S
D
_
Terminals 1-2: Auxiliary power
Provides DC power to measurement
circuit. Required for all CDTX-90
systems.
CDTX-90-3 System Power/Loop Connections
CDTX-90-3 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
Trans mitte r
Terminals
P ower
S upply
12–24 V DC
–
+
Loop 2 –
Loop 2 +
System Power Loop 1 –
System Power Loop 1 +
AUX Power –
AUX Power +
6
5
4
3
2
1
NC
NC
Stand-alone application, no current loop used
Internal
PLC Connection
6
5
4
3
2
1
Trans mitte r
Terminals
Loop 2 –
Loop 2 +
System Power Loop 1 –
System Power Loop 1 +
AUX Power –
AUX Power +
P L C Terminals
Channel 1
4-20 mA
+
–
Power
Supply
12–24 VDC
Channel 2
4-20 mA
+
–
–
+
Connection to a PLC with internal power supply
Internal
PLC Connection
6
5
4
3
2
1
Trans mitte r
Terminals
Loop 2 –
Loop 2 +
System Power Loop 1 –
System Power Loop 1 +
AUX Power –
AUX Power +
P L C Terminals
Channel 1
4-20 mA
+
–
Power
Supply
12–24 VDC
Channel 2
4-20 mA
+
–
–
+
Connection to a PLC with internal power supply
Loop 2 –
Loop 2 +
System Power Loop 1 –
System Power Loop 1 +
AUX Power –
AUX Power +
6
5
4
3
2
1
6
5
4
3
2
1
Loop 2 –
Loop 2 +
System Power Loop 1 –
System Power Loop 1 +
AUX Power –
AUX Power +
Channel 3
4-20 mA in
Channel 4
4-20 mA in
–
+
–
+
Trans mitte r 1
Terminals
Trans mitte r 2
Terminals
Channel 1
4-20 mA in
Channel 2
4-20 mA in
+
–
+
–
P ower
S upply
12–24 V DC
–
+
Two transmitters connected to a PLC/Recorder with separate power supply