Worldwide Inline Process Control Solutions

156 / 556 - Converters

156 / 556 - Converters

  • Inline real-time process monitoring
  • 3-digit LED display
  • 0/4-20 mA-output
  • 2 independent alarm setpoints
  • Reliable cost effective measurements
  • Compact dimensions

Overview

Converters 156 and 556

The 156 and 556 converter provide continuous inline, real-time measurement and control of concentrations, color changes or turbidity in a variety of industrial processes.

With four fixed measuring ranges and one variable measuring range, the converters can be set to match your specific process parameters.

The 3-digit LED indicator displays the percentage of the selected measuring range. Two independent set points and one mA output are provided for alarms and real-time process monitoring when wired to the plant's process control system. An additional failsafe relay output is built in for remote sensing of lamp or power failure.

Combined with a precision sensor, the converters are cost-effective measuring systems that provide reliable measurements throughout your process.

Converter 556 156
Turbidity sensors TF56-N AF56-N, AS56-N
Color sensors n/a AF56-F, AS56-F
Measuring principle dual channel scattering of light (11°) single channel absorption of light
Measuring Ranges TF56-N
  • 0 - 25 to 500 ppm (DE)
  • 0 - 10 to 200 FTU
  • 0 - 2.5 to 50 EBC
  • AF56-N: 0 - 0.5 to 4 CU
  • AS56-N: 0 - 0.5 to 4 CU
  • AF56-F: 0 - 0.5 to 2 CU
  • AS56-F: 0 - 0.5 to 1.5 CU

back

  1. Potentiometer for lamp voltage
  2. Lamp output (only for optek sensors)
  3. mA output (4-20mA)
  4. Relay output 1
  5. Relay output 2
  6. Relay output 3
  7. Power switch
  8. Selector switch for voltage
  9. Power supply (fixed)
  10. Fuse 1
  11. Fuse 2
  12. Detector input (only for optek sensors)

front

  1. LED (red), power indication
  2. LED (red), lamp failure indication
  3. Digital read-out, LED display, 3 digits
  4. 5 LEDs (yellow), indication of set measuring range
  5. DIP switch (RANGE1-10) for measuring range setting
  6. Potentiometer (VAR) for setting the variable measuring range
  7. Potentiometer (ZERO) zero point setting
  8. DIP switch (DISP 5-6) for setting digital read-out 1
  9. Potentiometer for setting digital read-out 1
  10. LED (green), zero point indication
  11. Encoding button for setting alarm 2
  12. LED (red), switch indicator for alarm 2
  13. Encoding button for setting alarm 1
  14. LED (red), switch indicator for alarm 1

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Technical Data

156 556
Housing

19"-version for rack-mounting 3 U / 21 HP

dimensions: W 106.3 mm (4.19 in) H 128.4 mm (5.06 in) D 208 mm (8.19 in)

material: aluminium / diverse plastics

protection: front IP40 / rear IP20 (mains supply secured against accidental touching)

Display

1 digital read-out, LED display, 3 digits, height: 7 mm

Operation

dip switches, potentiometer, coding switch

LED

1 LED (red):power on

1 LED (green):zero

5 LED (yellow):measuring ranges

2 LED (red):alarms I and II

1 LED (red):lamp or system failure

Sensor-inputs

1 for optek photometric sensor AF56 or AS56

1 for optek photometric sensor TF56

Sensor lamp-outputs

1 lamp supply for optek photometric sensor 4.8 -7.0V DC

mA-outputs

1 x 4 - 20 mA (NAMUR)

(functionally gavanically isolated)

accuracy:< 1 %

load:< 500 Ohm

Relay-outputs

2 independently adjustable SPDT contacts

0 - 250 V AC, 0 - 300 V DC, 0 - 8 A (refer to load limit curve relay outputs in the manual)

for alarm I and II

Failsafe-output

1 SPDT contact to alarm in case of lamp or system failure (active)

0 - 250 V AC, 0 - 300 V DC, 0 - 8 A

(refer to load limit curve relay outputs in the manual)

Cable lengths
(sensor)

2, 3, 5, 10, 15, 20, 30 ... 100 m

(7, 10, 16, 33, 49, 66, 98 ... 328 ft.)

sensor AS56: max 50 m

Power supply

115 / 230 V AC, selectable (93.5 - 132 / 187 - 264 V AC, 47 - 64 Hz) or 24 V AC / DC (AC: 20.4 - 26.4 V AC, 47 - 64 Hz; DC: 20.4 - 28.8 V DC)

power consumption:< 30 VA

Ambient conditions

temperature during operation (no direct sunlight):

converter:0 - 50 °C (32 - 122 °F)

with optional stainless steel housing S19-42 (IP65):0 - 40 °C (32 - 104 °F)

with optional plastic housing B19-42 (IP66):0 - 35 °C (32 - 95 °F)

with optional plastic housing B19-21 (IP66):0 - 35 °C (32 - 95 °F)

temperature during transport (no direct sunlight): -20 - 70 °C ( -4 - 158 °F)

Data given are subject to changes without prior notice.

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