Harris Constellation - Figure 4-11: Constellation Backplane (Top Left); Table 4-10: Relay Specifications

Constellation™ 2002 June 20
4-16
Located at the top left side of the radio (Figure 4-11), this 50-pin D connector
(Figure 4-12) is available for customer-configured alarms. The SPU Controller
provides 8 opto-isolated alarm inputs. The system provides 8 dry-contact,
relay outputs as defined in Table 4-11. Input level of alarm input shall be open
or ground. The Service Channel provides the Callout outputs. Table 4-10 lists
the relay specifications.
Figure 4-11: Constellation backplane (top left)
Table 4-10: Relay specifications
Characteristic Value
Nominal switching capacity (resistive) 2 A, 60 Vdc
Max. switching power (resistive) 60 W
Max. switching voltage 220 Vdc
Max. switching current 2 A
Min. switching capability 10
µA, 10 mV dc
BAT A
BAT B
RET
24/48VDC
HARRIS Constellation Backplane
TO FUSE PANEL
ALARM I/O
Filter
Filter
Filter Filter
26
1
25
50
External
alarm/control
connector
J1
J2