1. BNC plug for pH electrode 2. Connection for electrode reference 3. Connection for potential Matching Pin 4. Acid/Alkaline dosage selection terminal: • contact open = acid selection • contact closed = alkaline selection 5. Not Used contact 6. Power supply terminal: • for BL981411-0 model: 12 Vdc adapter • for BL981411-1 model: 115 Vac or 230 Vac option 7. This contact acts as a switch for driving the dosing system (e.g. dosing pump) 8. Not Used contact 9. Jumper for enabling (jumper in) or disabling (jumper removed) the overtime control 10. Trimmer for overtime setting (typically from 5 to 30 minutes) 1. BNC plug for pH electrode 2. Connection for electrode reference 3. Connection for potential Matching Pin 4. Acid/Alkaline dosage selection terminal: • contact open = acid selection • contact closed = alkaline selection 5. 4-20 mA output terminal for recorder connection 6. Power supply terminal: • for BL931700-0 model: 12 Vdc adapter • for BL931700-1 model: 115 Vac or 230 Vac option 7. This contact acts as a switch for driving the dosing system (e.g. dosing pump) 8. External control and disabling of dosing system 9. Jumper for enabling (jumper in) or disabling (jumper removed) the overtime control 10. Trimmer for overtime setting (typically from 5 to 30 minutes) 1. BNC plug for ORP electrode 2. Connection for electrode reference 3. Connection for potential Matching Pin 4. Rdx/Oxd dosage selection terminal: • contact open = reductant selection • contact closed = oxidant selection 5. 4-20 mA output terminal for recorder connection 6. Power supply terminal: • for BL932700-0 model: 12 Vdc adapter • for BL932700-1 model: 115 Vac or 230 Vac option 7. This contact acts as a switch for driving the dosing system (e.g. dosing pump) 8. External control and disabling of dosing system 9. Jumper for enabling (jumper in) or disabling (jumper removed) the overtime control 10. Trimmer for overtime setting (typically from 5 to 30 minutes) 1. BNC plug for ORP electrode 2. Connection for electrode reference 3. Connection for potential Matching Pin 4. Rdx/Oxd dosage selection terminal: • contact open = reductant selection • contact closed = oxidant selection 5. Not Used contact 6. Power supply terminal: • for BL982411-0 model: 12 Vdc adapter • for BL982411-1 model: 115 Vac or 230 Vac option 7. This contact acts as a switch for driving the dosing system (e.g. dosing pump) 8. Not Used contact 9. Jumper for enabling (jumper in) or disabling (jumper removed) the overtime control 10. Trimmer for overtime setting (typically from 5 to 30 minutes) BL981411 BL931700 BL932700 BL982411 HI981411-1 rear connections example shown HI983320-1 rear connections example shown Rear Connections 15 Process Instrumentation 15.96 | www.hannainst.com controllers
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