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Gefran 3500: Process Controller (temperature, mA, Vdc)
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The 3500 serie programmer-controllers can use up to 100 steps (100 ramps and 100 holds), grouped in 50 different programmes.

The programmer can have a cyclic function, a time base configurable from seconds to days, software alarms for the control of the response of the controlled system and four different modes of restart after a power out.
 
Features:
  • Thermocouple, resistance thermometer and linear inputs with configurable scales and characterisation
  • Remote setpoint, valve position or load current sensing input (optional)
  • 8 configurable optoisolated digital inputs (optional)
  • 8 configurable optoisolated outputs that may programmewd with time (optional)
  • Double independent PID outputs (Heat/Cool) 10 sets of PID tuning parameters to select from for each program step
  • Configurable isolated retransmission output
  • 2...10 configurable alarms
  • Expansion up to 16 relay outputs (optional)(with 2 MD81 units)
  • Serial line: optoisolated 4-wire configurable. Protocol: GEFRAN CENCAL or MODBUS 
Sensor Inputs: 
Types: 
TC- Thermocouples:J, K, R, S, T, B, E, N, (NiNi18Mo)
RTD 3-wires:Pt100 -200...600ºC
DC- Linear:

0...50mV; 10...50mV
External shunts are used for voltage ranges 0...10V and current ranges of 0...20mA
and 4...20mA. Custom 32 segment characterisation

Auxiliary inputs:

For remote setpoint:
0..10V Ri> 100K?
0...20mA Ri = 50?
4...20mA Ri = 50?
For potentiometer: 0...1V Ri > 10?
For current transformer: 0...5Aac, 50/60Hz, Ri = 20m?

Digital:3 isolated control inputs:
Start, Stop, Reset
-NPN 12V/3.5mA
- PNP 24V/6mA (12V/2mA)
8 programmable inputs
- NPN12V/5mA
- PNP 24V/4mA
PNP 12V/2.5mA
Sampling time:120 msec
Precision:Accuracy 0.1%f.s. ± 1 digit
Digital input:Isolated 1500 V
Outputs: 
Maximum number of outputs:5
Types: 
Continuous:0...10V max 20mA
0...20, 4...20mA load max 500?
Resolution 4000steps, max. update time 80msec.
Relay:5A/250Vac
Logic:23Vdc, Rout = 470? (20mA, max. 12V)
MD81

Interface output for MD81 unit.
The functions attribute to each module re programmable from the faceplate keys:
8 event outputs (1...8) of the programmer
8 event outputs (9...16) of the programmer
8 intercept outputs (alarms 3...10)

Digital:8 isolated programmer outputs configured by jumpers: SOURCE 12V (max.40mA total) shortcircuit protection
SINK externeal 3...30 V (max.33V), 50mA for each output
Ri = 100? ; Max. reverse voltage: -50V
Power supply:100 to 240 Vac/dc ± 10% 50/60 Hz; 12VAmax. (3500), 15VA max (4500) Protection by internal fuse not serviceable by the user
Working temperature:0 to 50ºC
 
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