The MAQ20 relay module, MAQ20-DORLY20, contains 20 relays that may be wired as a 4x5 cross point switch as shown in the figure 1 below. The numbers 1-40 represent the 40 spring terminals of the module. The labeled connections C0-C4 and R0-R4 are system connections.
Figure 1: Wire diagram of MAQ20-DORLY20 used as 4x5 cross point switch.
The MAQ20-DORLY20 in such configuration as cross point switch can find valuable use in many applications. One example is the use in a manufacturing or distribution center conveyer.
Let’s imagine that up to 5 machines or operators produce outputs, C0-C4, for the next operation, R0-R4. Up to four machines or operators are to receive the Cx outputs. When a C station signals completion to the conveyor controller, the controller picks the C output, but takes no further action unless, or until, an R station is ready, or becomes ready, for input.
If C2 station has been picked and R1 becomes available for input the controller closes relay C2-R1. This in turn causes the conveyer to move to and place its container at the R1 station.
The following table lists the relay cross reference:
| System Connection |
Relay Number |
| C0-R0 | 1 |
| C0-R1 | 6 |
| C0-R2 | 11 |
| C0-R3 | 16 |
| C1-R0 | 2 |
| C1-R1 | 7 |
| C1-R2 | 12 |
| C1-R3 | 17 |
| C2-R0 | 3 |
| C2-R1 | 8 |
| C2-R2 | 13 |
| C2-R3 | 18 |
| C3-R0 | 4 |
| C3-R1 | 9 |
| C3-R2 | 14 |
| C3-R3 | 19 |
| C4-R0 | 5 |
| C4-R1 | 10 |
| C4-R2 | 15 |
| C4-R3 | 20 |
The relay module, MAQ20-DORLY20 in combination with the MAQ20-COMx module, may also be used for other
applications by wiring it as one of several multiplexer purposes, or just driving 1 to 1 to machine contactors.
The MAQ20 discrete input module, MAQ20-DIVC20, may be used to detect signals from C and R functions. A simple
MAQ20 system built with just two modules, the MAQ20-COM and MAQ20-DORLY20 can control a multi-input, output
conveyer.
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