Emerson 2468CD, 2468CB manual 3c-7

Hydrastep 2468CB & 2468CD Manual Opto-isolated Output Board Option

3C.3.1 CONFIGURING THE OPTO-ISOLATED OUTPUT BOARD

WARNING Mains voltages are present in this instrument when power is connected. De-energise before opening front cover.

Gain access to the printed circuit board assemblies inside the Hydrastep 2468 enclosure as follows:

1.Isolate the 2468 electronics enclosure from its power supplies.

2.Gain access to the output PCB and set the relevant switches for the required function.

3c.3.1.1 Electrode/Opto-Output Selection (Opto-1, Opto-2, Opto-3 & Opto-4 Outputs) - SW1 to SW4

Four identical switches are provided, one for each output (but see SW6) each having four sets of contacts. This allows coded selection of any one of 16 electrodes for each switch in the case of the single input card. When dual input cards are fitted, odd numbered electrodes feed into one input card with the even numbered electrodes being fed into the other input card. Each input card then offers any mounted output card the choice from its electrode inputs, with the resultant selectivity as shown in Table 3c.1.

Switch SW1, SW2, SW3 or SW4 Settings for						Electrode Selection
	Opto 1 to Opto 4 respectively
		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 3c.1 - Electrode selections for opto-isolated outputs Opto 1 to Opto 4

Example: Single Input Board - Electrode 13 selected.

Dual Input Boards: Odd input board - Electrode 25 selected Even input board - Electrode 26 selected. OFF

1 2 3 4

24685034 3c-7