Figure 3-10 Alarm And Trouble Connections (Spb-160 And Spb-80/4); Figure 3-11 Power And Battery Connections - Wheelock SAFEPATH4 Application, Installation, Operation, And Maintenance Manual

Expansion Output and Trouble Contact Connections
The purpose of the Expansion Output (EXP OUT) is to provide a 24VDC at 0.5A supervised,
power limited output when the Audio Booster audio output is operating. This allows additional
Audio boosters to be connected by having the EXP OUT connect to the AUX IN of the next Audio
Booster. The strobe input circuit on an SPB-80/4 will not cause the expansion output to energize.
Alarm and Trouble Connections (SPB-160 and SPB-80/4)
The Trouble relay changes state whenever a trouble condition occurs on the Audio Booster circuit
board and when the TROUBLE LED D24 lights. As shown in Figure 3-10, connecting to the
common terminal (C) and the normally open terminal (NO) would prevent current flow through the
relay contacts in the normal operating condition. A trouble condition will cause the relay to switch
states allowing current to flow. When there is no power (DC IN or BATTERY) the common and
normally open contacts will be shorted.
1. If required connect the Expansion Out. Ensure that a UL Listed 10K Ohm EOLR is
connected for supervision.
2. Connect External Trouble circuit to the proper Trouble (TRB) connections.
3. Connect the panel to earth ground, following the National Electrical Code (NEC) and local
codes for the type of system being installed. Wire gauge selection of the earth ground wiring
should involve consideration of all factors, including maximum allowable wire resistance and
length. The panel is tied to earth ground by connecting the ground terminals to an earth
ground. The location of the ground terminal strip within the panel is shown in Figure 3-18 for
both the SPB-160 and the SPB-80/4 (Page 35).
Power and Battery Connections
Wiring to the DC IN is factory installed from the Power Supply Module (SAPS).
NOTE: DC OUT is a 24VDC at 0.5A output for powering splitter modules only. .
BATTERY terminals are used to connect the backup batteries to the panel for recharging and
backup power. The UL approved battery connection is 24VDC at 12AH. See Figure 3-11.
TB6
EXP OUT
NO CON
C
NO
NC
Figure 3-10
TB4
DC IN
DC OUT
BATTERY

Figure 3-11 Power and Battery Connections

T
R
B
Expansion Out and
Trouble Contacts
Power and DC
Connections
29