External communications 
A36951-C.doc
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ʄ Jumpers and switches 
Standard
position
ID  LEGEND  POSITION
FUNCTION / COMMENTS 
1 2
S1-1  VAL  VAL  RS422 point-to-point link (just one printer 
on the link). 
     
S1-3  VAL  not VAL RS422 point-to-multipoint link (printer 
selected with VALID422). 
1 2
S2_1  RXD  232  RS232 serial link mode selected 
     
S2_3  RXD  422  RS422 serial link mode selected. 
2 3
S3-3  TOP2  TOP2  DTOPIMP2 signal from optocoupled input 
DTOP2.
     
S3-1  TOP2  not 
TOP2
DTOPIMP2 signal from input DTOP1 
(when operating with two heads and a 
single DTOP cell) 
2 3
S4-3  TAC2  TAC2  TACHYIMP2 signal from optocoupled 
input TACHY2. 
     
S4-1  TAC2  not 
TAC2
TACHYIMP2 signal from input TACHY1 
(when operating with two heads and a 
single tachometer). 
     
S5-3  INV2  INV2  DTOPIMP2 signal inverted. 
1 2
S5-1  INV2  not INV2 DTOPIMP2 signal not inverted. 
     
S6-3  INV1  INV1  DTOPIMP1 signal inverted. 
1 2
S6-1  INV1  not INV1 DTOPIMP1 signal not inverted. 
S7-3  SPROG2  SPROG
2
SPROGI2 signal operates in SPROG 
mode.
1 2
S7-1  BUSY2  BUSY2  SPROGI2 signal operates in BUSY mode.
     
S8-3  SPROG1  SPROG
1
SPROGI1 signal operates in SPROG 
mode.
1 2
S8-1  BUSY1  BUSY1  SPROGI1 signal operates in BUSY mode.
       
S9-3  T2  T2  24V alarm on J5 operates with 2 heads 
1 2
S9-1  T2  not T2  24V alarm on J5 operates with one head