OctoPOPIT Sensor Loops
The number
Certain UL and NFPA applications may limit the number of detection devices. Consult the appropriate UL or NFPA standards.
The OctoPOPIT detects open, short, closed, normal, and grounded circuit conditions on its sensor loops and transmits the conditions to the D9112. A ground on the positive leg of the sensor loop transmits a shorted condition for the point. Each sensor loop is assigned a point number and transmits to the D9112 separately. See Point Assignment Switches below.
Radionics recommends you use
There are two rows of terminal numbers on the D8128A. See Figure 16. In the row closest to the terminal blocks, the positive outputs for the sensor loops are labeled P1 to P8. Sensor loop outputs P1 and P2, P3 and P4, P5 and P6, and P7 and P8 share common terminals. The common terminals for each pair are labelled COM.
Sensor Loop Switches
Switches 1 to 8 activate each of the eight OctoPOPIT sensor loops. Setting the switch ON enables reports from that sensor loop. Setting the switch to OFF disables the loop. If you disable a sensor loop assigned to a point that the D9112 expects to see, the D9112 interprets it as a missing point.
Always set the Sensor Loop switch for points 72 and 136 to OFF: The D9112 reserves points 72 and 136 for internal functions. Set switch P8 to OFF to disable the sensor loop for those points. Setting P8 to ON for points 72 and 136 may cause erroneous PT BUS TROUBLE reports.
Switch 1 corresponds to sensor loop 1 (terminal P1), switch 2 corresponds to sensor loop 2 (terminal P2), and so on.
Terminate each OctoPOPIT sensor loop with a 1k ý
Point Assignment Switches
Switches 9, 10 and 11 on the OctoPOPIT assign the sensor loops to D9112 point numbers. Table 2 shows the OctoPOPIT switch settings for point assignments. Each setting assigns point numbers to all eight sensor loops. Set the sensor loop switches (1 to 8) to OFF for points on the OctoPOPIT you don’t intend to use.
Duplicated points do not function correctly: Take care not to duplicate point assignments. Points assigned to both an OctoPOPIT sensor loop and a POPIT, two OctoPOPIT sensor loops, or two POPITs, do not function properly.
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