Emerson 2468CD User Manual

Hydrastep 2468CB and 2468CD Manual 

Delay Relay Output Board Option 

The delay relay board contains no replaceable circuit components, failure of the board 
requires replacement of the entire board.  The only component that can be replaced is the 
nylon spacers. 
 

 

WARNING 

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

 
The replacement of nylon spacers fitted to the output board requires access to the non-
component side of the PCB. 
 
Note:  Spacers will only be fitted on the output board if a second output board is to be fitted 
or has been fitted. 
 
The spacers are secured in their holes by nut and nylon washer.  To carry out a spacer 
replacement, the output board has to be removed from the input board. The procedure 
adopted is:  
 
1.  Isolate the 2468 electronic enclosure from the power supply. 
 
2.  Gain access to the PCBs and undo sufficient connections for the removal of the output 

board containing the defective spacer. 

 
3.  Remove the output board(s) by applying pressure 

to the upper spring-loaded spigots and easing the 
output board off its spacers a out of its Berg 
plug/socket connection. 

 
4.  Undo the nut and washer securing the faulty 

spacer and extract it from its hole, see inset 
diagram. 

 
5.  Fit the new spacer in position, align correctly on 

the board and secure firmly using the M4 nut and 
nylon washer. 

 
6.  Refit the PCB(s) into the enclosure, re-connect 

the PCB(s) as required and close the enclosure 
cover.  Re-apply power if required. 

 

The following list items are available as spare parts: 

Electrical: 

Delay relay PCB assembly: 

Socket 5K2 free (8-way)  

Socket 5K3 free (8-way) 

 

24680509B 

351508100 

351503100 

Mechanical: 

Spacer, nylon 15.9 LG 
Washer, nylon 
Nut, M4 

 

412012080 
411999910 
410031020