Grandview GPCK-MB1000B - Manual (Page 9)

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figure 5
3. Figure 6, install the projector lift and fasten. The low frame of projector must align to ceiling.
4. Figure 7, check about the balance of projector lift
figure 6
nut
5. Figure 8，connect the power cord and signal cord（Circuit wiring diagram 9）
figure 7
OxC9
OxE9
Central Control Instruction
Emitter Function
Crystal Socket
Common Line
Switch for Extending
Switch for Retracting
Stop
RS232 Input B
RS232 Input A
Central Control Format Agreement
1) Communications Agreement Setting：
data bits: 8 bits、start bits：1 bit、stop bit: 1bit、baud ratio: 2400
2) Directive for retracting：
3) Directive for stopping：
4) Directive for extending：
232 setting: 2400, n, 8, 1 a continuous data sends two times，each time interval of 200ms.
Multi-Function
Control Diagram
Stop
Down
Up
Common
Projector Lift Up
Projector Lift Down
Projector Lift Stop