Wheelock SAFEPATH SAPE-1AB, Operation And Installation Manual

Page: 27 / 79

SAFEPATH Manual Sheet 28 of 78
Rev. C April 1999
Wiring Guidelines
Although the SAFEPATH products incorporate signal verification and noise filtering circuitry on their inputs, induced voltages or
noise on the input wiring can cause improper operation. Therefore, use shielded twisted pair wire for all dry contact input wiring.
The shield of each cable should be connected only at one end. Each shield of each cable that connects to the SAFEPATH panel is
to connect to the grounding points provided near the knockout locations on the chassis (see Figure 7).
WARNING: ALL SAFEPATH DRY CONTACT INPUT WIRING AND AUDIO WIRING SHOULD BE ROUTED AWAY FROM
ANY HIGH VOLTAGE OR HIGH CURRENT LINES (SUCH AS AC OR DC POWER LINE, AUDIO POWER
LINES, AND MOTOR OR RELAY ACTUATION LINES) AND SHOULD BE INSTALLED IN SEPARATE
CONDUIT FROM HIGH VOLTAGE OR HIGH CURRENT LINES. FAILURE TO DO SO MAY CAUSE
ELECTRICAL SHOCK RESULTING IN PROPERTY DAMAGE AND SERIOUS INJURY OR DEATH TO YOU
AND/OR OTHERS.
The National Electrical Code defines two types of circuits for protective signaling systems: power limited circuits and non-power
limited circuits. The SAFEPATH dry contact input circuits have been designed as power limited circuits . All other circuits are
non-power limited . Power limited and non-power limited wiring within the SAFEPATH panel must have a 1/4” separation. Figure 7
illustrates one possible wire routing which will accomplish the required separation: power supply and battery wiring must be routed
through the conduit entrances on the left-hand side of the panel, all digital voice module wiring must be routed through the conduit
entrances on the lower right-hand side of the panel, and all output wiring from the motherboard must be routed through the conduit
entrances on the upper right-hand side of the panel.
CAUTION: The National Electric Code limits the maximum number of conductors that can be installed in conduit and wiring
boxes depending on the size of the conduit, the volume of the boxes, and the gauge of the wire used. Make
sure that wiring used for SAFEPATH installation complies with the latest NEC requirements.
See the SAFEPATH “Field Wiring Connection” section for recommended wire sizes and wire type to use for all SAFEPATH input
and output circuits.
Mounting
The SAFEPATH panel shall be mounted in a location within the environmental limits specified in the latest UL Standard for indoor
control panels. The SAFEPATH panel shall not be located in a hazardous location. Refer to the "Technical Specifications'' section.
CAUTION: In order to comply with the latest NFPA and UL requirements for interconnection of fire alarm control equipment,
the SAFEPATH must be located in the same room as, and within 20 feet of, a LISTED compatible fire alarm
control panel, with the wiring enclosed in conduit and properly connected to such control panel.
Refer to Figure 7 for SAFEPATH panel mounting hole layout. Drill mounting holes for appropriate screws and anchors to ensure
secure mounting to the type of surface at the selected location. Keep out dust and dirt during installation, as they can interfere with
the operation and reduce the life of the equipment.
Remove the door and mount the SAFEPATH panel at the selected location. Use care to avoid damage to the module PC boards
during installation . Do not apply excessive pressure to any PC board or its components, including field wiring terminals and
connectors.
Refer to Series DV-EM operations and installation manual for Series DV-EM mounting instructions.
Grounding
The SAFEPATH panel should be connected to earth ground in accordance with the National Electrical Code. Connecting the
SAFEPATH panel to earth ground will reduce static discharge failures, improve transient protection, and reduce the chance of
electrical shock. The SAFEPATH panel should be grounded as follows:
1. Connect a wire between the ground screw on the digital voice module (DX-100 or DX-200) printed circuit board and the
adjacent ground terminals on the enclosure. See Figures 5 and 6, respectively, for the location of the ground screw and the
adjacent enclosure ground terminals for DX-100 and DX-200 configured panels.
2. Connect a wire between the ground lug (labeled “EARTH GROUND”) in Figure 11 and earth ground.