User`s manual

8.3.3 Jumper Setting:
Note: user should remove R19, R20, R21, R22 and R23 in the 7188XC first.
J1: I/O expansion bus, connect to J1 of 7188XC
J2: I/O expansion bus, connect to J2 of 7188XC
J7: One channel of relay output
TP0: Original function on 7188XC
TP1: One channel of relay output
Jumper: Select TP0 or TP1 function
TP0: JP9 and JP8 closed
TP1: JP9 and JP10 closed
8.3.4 Programming:
SetDio4Dir( 0 ); // Set channel-0 to DO
SetDio14Dir( 0 ); // Set channel-1 to DO
SetDio4Low(); // Turn channel_0 relay OFF
SetDio14Low(); // Turn channel_1 relay OFF
SetDio4High(); // Turn channel_0 relay ON
SetDio14High(); // Turn channel_1 relay ON
I/O Expansion Bus for 7188X/7188E User’s Manual, Jun/2004 v1.4, 7PH-000-14---47