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Hydrastep 2468CB and 2468CD Manual Relay Output Board Option
24685034 3a-7
3A.3.1 RELAY OUTPUT BOARD
3a.3.1.1 Configuring the Relay Output Board
WARNING Mains voltages are present in this instrument when power
is connected. De-energise before opening front cover.
1. Isolate the 2468 electronics enclosure from its power supplies.
2. Gain access to the relay output PCB and set the relevant switches for the required function.
3a.3.1.2 Electrode/Relay Selection (Relays RL1, RL2, RL3 & RL4) - SW1 To SW4
Four identical switches are provided on the relay board for electrode selection. Any of the
electrodes, connected to the input board on which the relay board is mounted, can be
selected as the input for any of the relays.
With one input board installed, any electrode connected to the system can be used as the
source for any of the four relays. With two input boards installed, the relay board mounted
on the input board connected to the odd numbered electrodes, accepts inputs from the odd
numbered electrodes. Similarly, the relay board mounted on the input board connected to
the even numbered electrodes, accepts inputs from even numbered electrodes. Table 3a.1
details switch selection.
Switch SW1, SW2, SW3 or SW4
Settings for RL1 to RL4 respectively
Electrode Selection
Switch Contacts One Input Two Input Cards
1 2 3 4 Card Odd I/P Card Even I/P Card
On On On On 1 1 2
Off On On On 2 3 4
On Off On On 3 5 6
Off Off On On 4 7 8
On On Off On 5 9 10
Off On Off On 6 11 12
On Off Off On 7 13 14
Off Off Off On 8 15 16
On On On Off 9 17 18
Off On On Off 10 19 20
On Off On Off 11 21 22
Off Off On Off 12 23 24
On On Off Off 13 25 26
Off On Off Off 14 27 28
On Off Off Off 15 29 30
Off Off Off Off 16 31 32
Table 3a.1 - Electrode selections for relays RL1 to RL4
Example: Single Input Board: Electrode 13 selected.
Dual Input Boards: Odd input board - Electrode 25 selected
Even input board - Electrode 26 selected.
1
2
3
4
OFF