Instruction manual

3-12
Strobe Appliance Circuit Input Wiring
The Strobe Appliance Circuit Input consists of a NAC (9 to 31VDC) input and a Return (RET) that
can be used for additional appliances or FACP end of line resistor. The output is a supervised
NAC (24VDC) Circuit. As described in Table 3-1 on Page 3-3 this output can provide a
synchronized output for compatible Wheelock, Inc. synchronized strobes. When a synchronized
signal from a previous module is used open Jumper W2 (Figure 3-15, Page 3-15).
Digital Voice Initiating Input Wiring
The Digital Voice Initiating Connections (IN1, IN2, IN3) provide the initiation of the stored
messages in the Digital Voice Section of the SP40/2 panel. Each initiation circuit requires a NAC
(9 to 31VDC) input to trigger the respective voice message. Each initiating circuit has a blocking
diode that allows supervision of the input wiring. Additional information can be found in Table 3-1
on Page 3-3.
The Digital Voice Initiating Connections can also be used to initiate the strobe circuit when the
voice message is initiated. DIP Switch SW2 controls the strobe circuit for one or all voice
messages.
Ancillary Audio Input Wiring
The SP40/2 panel has three ancillary audio inputs. Listed in order of priority, they are Night Ring
(NR), Telephone Page (TEL), and Background Music (BGM). These inputs are not supervised.
The Night Ring input requires a dry contact closure. The Telephone Page input requires an input
from a Telephone Page Port. The Background Music input requires a line level, 600 Ohm, 1Vrms
signal.
Alarm and Trouble Output Wiring
The Alarm Form C relay contacts change state when certain audio inputs are in alarm. The
Trouble Form C relay contacts change state when the panel goes into any trouble condition. See
Table 3-1 on Page 3-3 for additional information.
WARNING: IT IS IMPORTANT THAT THE WIRING USED FOR INPUT VOLTAGE WIRING
IS LARGE ENOUGH TO CARRY THE MAXIMUM CURRENT REQUIRED BY THE SP40/2
PANEL WITHOUT EXCESSIVE VOLTAGE DROP. IF VOLTAGE DROPS FROM AC POWER
LINE LOADING AND WIRING RESISTANCE IS NOT WITHIN THE SPECIFIED OPERATING
VOLTAGE RANGE, THE SP40/2 PANEL WILL NOT FUNCTION PROPERLY.
Alarm Output Contact Wiring
The location of the Alarm Output Connections is shown in Figure 3-1 Section 3 (Page 3-2). A
magnified view of this area on the Mother Board is shown in Figure 3-7 on Page 3-7.
• Wire gauge selection of the Alarm Status output contact wiring should involve consideration of
all factors including, wire loop length, maximum current capacity, and maximum voltage drop
allowable.
• The Alarm Status output contact is Form C, rated for 2.0 amps at 24VDC, resistive load.
• For terminal connection details of the Alarm Status output contact (shown in the non-alarm
mode) see Figure 3-11, below.
• An external 24VDC or the internal 24VDC connection (TB1) can be used to power non-
supervised Alarm appliances. See Figure 3-1, Section 1 (Page 3-2) for location of TB1.