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Introduction to the Hydrastep 2468 Electronic Gauging System Hydrastep 2468CB and 2468CD Manual
1-6 24685034
1.2.3 SYSTEM FAULTS (2468CB OR 2468CD)
System fault indication, a yellow LED and an opto-isolated output, is provided for a ‘water
above steam’ condition, an electrode fault or wiring failure and the detection of an internal
fault. A further fault is indicated when the electrode number switch is incorrectly set. This
fault is indicated by a chequered display of red and green LEDs on the level display.
Faults and their remedies are covered in Chapter 2 under ‘Fault Analysis & Corrective
Action’.
1.3 SYSTEM OPTIONS
1.3.1 OUTPUT BOARDS
Each input board can accept one or two output boards that can be used for water level
signalling, alarm or trip functions. Each output board provides four relay outputs or four opto-
isolated outputs. The first output board is fitted directly on top of the input board using three
nylon pillars. A second output board (when required) can be fitted on top of the first output
board using the same type of fixture. The various output boards are described in Chapter 3.
1.3.2 REMOTE DISPLAY UNITS
Provision is made to drive Remote Display Units. The display board is capable of driving up
to 6 remote display units. Only one of these can be powered by the Hydrastep unit, any
additional remote displays must be locally powered.
A remote display unit ‘mimics’ the display on the Hydrastep 2468 and is as described in
Chapter 4.
1.3.3 OPTION DETAILS
1. Relay Board 24680504 has 4 fully configurable relay outputs Chapter 3a
2. Relay with Time Delay board 24680509 has 4 fully configurable relay outputs Chapter 3b
3. Opto-isolator board 24680505 has 4 fully configurable opto-isolated outputs Chapter 3c
4. Remote Display 24683B. Panel mounted DIN size 8 to 32 electrode display Chapter 4
5. Remote Display 24683C Panel mounted large LED 8 to 32 electrode display Chapter 4
6. Remote Display 24683D Wall mounted splash proof version of 24683C Chapter 4