Eurotherm 3216i User Manual download pdf (Page 13)

3200iSeries Indicators

Part No HA029006 Issue 5.0 Sept-12 11

2.6.4 Digital Inputs A and B

Digital input A is not available in 32h8i/SG and

optionally available on 3216i

• Not isolated from the sensor input

• Switching: 12Vdc at 40mA max

• Contact open > 500Ω. Contact closed < 200Ω

• Input functions: Please refer to the list in the

quick codes.

2.6.5 Transducer Supply

In 32h8i/SG a 10Vdc supply is available as an

excitation voltage for a bridge type transducer

• Minimum load resistance 300Ω

• Isolated output 300Vac CATII

2.7 Indicator Power Supply

1. Before connecting the indicator to the power

line, make sure that the line voltage corresponds

to the description on the identification label.

2. Use copper conductors only.

3. The power supply input is not fuse protected.

This should be provided externally.

4. For 24V the polarity is not important.

• High voltage supply: 100 to 230Vac, +

15%,

48 to 62 Hz

• Low voltage supply:

24Vac, -15% +10%

24Vdc, -15% +20% +

5% ripple voltage

• Recommended external fuse ratings are as

follows:-

For 24 V ac/dc, fuse type: T rated 2A 250V

For 100 - 230Vac, fuse type: T rated

2A 250V.

2.8 Example Wiring Diagram

This shows 32h8i/SG connections for a strain gauge

bridge.

Safety requirements for permanently connected

equipment state:

• A switch or circuit breaker shall be included in

the building installation

• It shall be in close proximity to the equipment

and within easy reach of the operator

• It shall be marked as the disconnecting device

for the equipment.

Note: a single switch or circuit breaker can drive

more than one instrument.

Dig In

Dig In B

Ext1

Ext2

32h8i/SG Indicator

CAL

Strain

Gauge

Internal

FET switch

Signal

- +

Cal

Txdcr

Supply

HF HE HD AC AE A

Fuse

- +

Cal

Ext

N L 3D 3C 3B 3A LC LB 2B 2A 1B 1A

24V

Line

Neutral

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 87 88

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Eurotherm 3216i User Manual Page 13

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