Instruction manual

3-12
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CONTACT
CLOSURE
INPUTS
RS
232
COM
TD
RD
NC
IN8
IN7
IN6
IN5
IN4
IN3
IN2
IN1
P83459 REV.
DCSP MOTHER BOARD
Dry Contact Inputs
Figure 3-11
Dry Contact Input Connections
• The dry contact input meets the requirements for power limited fire protective signaling
circuits as defined in the National Electrical Code (NFPA-72). The dry contact inputs are not
supervised. If supervision is required, use Model Number NACIM (Notification Appliance
Circuit Interface Module)
• The field wiring for the dry contact input shall not exceed 100 Ohms of resistance or 0.050 µF
of capacitance.
• IN1 through IN8 are the contact closure inputs for as many as 8 separate messages.
• The RS-232 input terminals shown in Figure 3-11 are not used.
IT IS IMPORTANT THAT THE WIRING USED FOR INPUT VOLTAGE
WIRING IS LARGE ENOUGH TO CARRY THE MAXIMUM CURRENT
REQUIRED BY THE DUAL-CIRCUIT SAFEPATH

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 SAFEPATH

PANEL
WILL NOT FUNCTION PROPERLY.
ALARM STATUS OUTPUT CONTACT WIRING
The location of the Alarm Status output connections are shown in Figure 3-10 Section C. A
magnified view of this area on the Mother Board is shown in Figure 3-12 on Page 3-13.
• 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 0.5 amps at 24 VDC,
resistive load.
• For terminal connection details of the Alarm Status output contact (shown in the
non-alarm mode) see Figure 3-13 on Page 3-13.