Configuring the system monitor Page 163 of 456
7For
a.Connect the appropriate cable (see the following list) from connector J4 on the system monitor in the column with CPU 0 (the master system monitor) to the associated UPS. Table 13 gives the pin assignments and signal descriptions for the alarm cables.
—For a Best Inc. UPS, use an NT8D46AJ alarm cable.
—For an Exide UPS, use an NT8D46AQ alarm cable.
—For an Alpha UPS, use an NT8D46AU alarm cable.
b.Connect the cable to the UPS as specified by the manufacturer.
c.Repeat this step for each system monitor with an associated UPS (see Figure 67 on page 164).
Table 13
NT8D22 System Monitor – pin assignments at J4
Pin | Signal description |
|
|
1 | Not used |
2 | Not used |
3 | Not used |
4 | Not used |
5 | Alarm 1 |
| (AC fail; to UPS) |
6 | Alarm 1 return |
7 | Alarm 2 |
| (Power sense; from UPS) |
8 | Alarm 2 return |
9 | Not used |
|
|
Communication Server 1000M and Meridian 1 Large System Installation and Commissioning
