Instruction Manual
Installation Installation and Operation Handbook
1-10 2408 and 2404 Controller
Module type Terminal identity Possible functions
A B C D
Isolated Logic
Output
+ -
This is a fully isolated module which can
be fitted in all three module slots. It may
be used for heating, cooling or events
outputs up to 18Vdc at 20mA.
Transducer
Power Supply
+ -
This provides fully isolated 5 or 10Vdc to
power external transmitters up to 20mA. It
can be fitted in module slots 1 and 2.
Table 1-2 Four terminal module connections
Connections for Process Value 2 in module position 3
The diagrams below show the connections for the various types of input.
The input will have been configured in accordance with the ordering code.
Triple Logic Input and output ratings
1. Triple logic input (current sinking)
OFF state: −3 to 5Vdc
ON state: 10.8 to 30Vdc(max), at 2 to 8mA
2. Triple contact closure or open collector transistor input
Internally generated switching Vdc & mA: 15 to 19Vdc at 10 to 14mA
OFF state >28KΩ input resistance
OFF state voltage >14Vdc
ON state <100Ω resistance
ON state voltage <1.0Vdc
3. Triple logic output (current sourcing)
OFF state output 0 to 0.7Vdc.
ON state output 12 to 13Vdc, at up to 8mA.
Thermocouple
3B
3C
3D
3A
+
−
Current
sense
resistor
2.49Ω
mA input
3B
3C
3D
3A
+
−
Resistance
thermometer
3B
3C
3D
3A
Volts or
mV inputs
+
−
0-1.6Vdc
High Impedance
or
mVdc
3B
3C
3D
3A
10V inputs
+
−
0-10Vdc
3B
3C
3D
3A