Wiring - Signet 9900 Operating Instructions Manual

Wiring

System Start-up: Step 2
Wire the transmitter for all connections with the power off. Keep any 4 to 20 mA and
relay-actuated output devices that are connected to it offl ine at this time.
Connect the sensors (page 11), power (page 17) and relay(s) (page 18).
Wiring Tips:
● Do not route the sensor, DC power, or 4 to 20 mA cables in conduit containing
AC power wiring. Electrical noise may interfere with sensor signal.
● Routing the sensor cable in grounded metal conduit can help prevent electrical noise
and mechanical damage.
● Seal the cable entry points to prevent moisture damage.
● Only one wire should be inserted into a terminal.
● Splice double wires outside the terminal or use appropriate wire ferrule,
not to exceed 2 mm (0.08 in) diameter.
All wiring connections to the 9900 are made via removable terminals.
In general:
● The Power, Loop and Open Collector plugs and the Relay Module plug accept
12 to 28 AWG wire.
The S L/Freq plug and the Cond/Res Module plug accept 16 to 28 AWG wire.
3
● Strip 7 mm (0.28 in.) of insulation from wire tips and tin bare ends to eliminate fraying.
● Insert wire tip or ferrule completely into the terminal and secure with the screw.
● Do not allow any AC leads that may be connected to the internal relays to come in
contact with low voltage wiring.
● Minimize handling of plug-in modules to reduce the
possibility of damage due to ESD.
● Handle modules by the edges. Never touch any exposed
circuitry or contacts.
● Wear an anti-static wristband or stand on an anti-static mat,
or keep one hand touching a properly grounded pipe or other
properly grounded piece of metal when handling modules.
8 9900 Transmitter
Next step: Relay Functions (see page 19).
CAUTION:
Avoid Electrostatic Discharge (ESD)
Tools Required
● Phillips screwdriver
● Flat-head screwdriver
● Wire strippers
For Field Mount
installations, refer to
the wiring diagram
inside the Field
Mount housing.