Installation manual

SAFEPATH Manual Sheet 30 of 78
Rev. C April 1999
Field Wiring
Before installation, the system specifier must determine the proper wire gauge for all field wiring. The field wiring is broken down
into two categories, inputs and outputs.
NOTE:
All field wiring shall conform to applicable codes and standards including NFPA, UL, local, state, county, province, district
and federal codes and standards.
SAFEPATH Field Wiring Connection
All SAFEPATH wiring terminals are designed to accept #22 AWG to #12 AWG wiring (one wire per terminal). Connect the field
wiring to the SAFEPATH terminals while referring to the following sections.
Install field wiring following the latest National Electrical Code and local codes for the type of system being installed. Make all
necessary connections. See Figure 8 for typical system block diagram.
Check the integrity of all field wiring following directions in the "Field Wiring Checkout" section. Confirm that the specified cable is
installed and there is continuity between required points (no "open circuits"), with no unwanted connections ("shorts") to other
conductors, chassis, or earth ground.
Perform the field wiring checkout before continuing with any connections to the
SAFEPATH wiring terminals.
WARNING: TO REDUCE THE RISK OF ELECTRICAL SHOCK, NEVER CONNECT OR DISCONNECT FIELD WIRING
WHEN INPUT VOLTAGE OR BACK-UP BATTERIES ARE CONNECTED TO THE SAFEPATH PANEL.
Input Wiring Descriptions
The SAFEPATH panel has seven types of inputs, the locations of which are shown in Figure 9. Detail of the message activation
terminal blocks and connectors is shown in Figure 10. Detail of the power input and ground terminals is shown in Figure 11.
Dry Contact Input Wiring
The dry contact inputs shall be dry contacts or open collector devices. Dry contacts or open collectors from multiple devices may be
connected in parallel as shown in Hook-up A in Figure 12. If multiple inputs are located at the same location, the (-) input leg may
be commoned to reduce wiring requirements as shown in Hook-up B in Figure 12. Each input circuit must have a LISTED 10K end-
of-line resistor across the last input contact. All unused or unsupervised inputs must have a LISTED 10K end-of-line resistor
installed across input terminals. The LISTED 10K end-of-line resistors must have a 1/8W minimum power rating and a 5%
maximum tolerance.
SAFEPATH dry contact inputs meet the requirements for power limited fire protective signaling circuits as defined in the National
Electrical Code. Each input meets Class B, Style B supervision requirements for initiating device circuits.
The gauge of the wire necessary for dry contact input wiring may vary for each dry contact input. The field wiring for each dry
contact inputs shall not exceed 100 ohms of resistance or 0.050 microfarads of capacitance.
Series DV-EM Wiring
One Series DV-EM port is provided. This port allows up to eight Series DV-EM’s to be connected to the SAFEPATH panel.
Attach the first Series DV-EM (J1, male plug) to the DX-100/DX-200 (J1, female socket) with cable assembly CAB-EM. (See Figure
1 in the Series DV-EM VoiceLink Operation and Installation Manual for the location of connectors on the Series DV-EM.) Connect
the cable's male plug to the J1 female socket on the right-side bottom of the DX-100/DX-200. Connect the cable's female socket to
the J1 male plug on the left-side of the Series DV-EM. To install additional Series DV-EMs, attach the next Series DV-EM (J1, male
plug) to the previous Series DV-EM (J2, female socket). Optionally, the Series DV-EMs can also be interconnected using the CAB-
EM cable assembly.
NOTE:
When connecting the first Series DV-EM to the DX-100/DX-200, either a rectangular hole capable of passing the
connector of cable assembly CAB-EM will have to be punched in the bottom of the SAFEPATH enclosure or the cable
assembly CAB-EM will have to be cut four inches from the cable’s male plug, passed through a conduit entrance, and
spliced back together inside the SAFEPATH panel.
Do not substitute alternate cables for the CAB-EM or connect field wiring to the eight DX-100/DX-200 dry contact inputs when any
DV-EM modules are used, as the SAFEPATH panel may fail to operate properly.