Sensidyne Sensalert Manual - Preliminary
PRELIMINARY
Sensidyne Document No. 7013227M (Rev H)
15
SENSALERT FOUR CHANNEL CONTROLLER
SECTION TWO
INSTALLATION
2.1
MOUNTING & WIRING
The SensAlert Controller is designed to be wall
mounted. Four mounting feet are supplied. The feet
mount to the back of the enclosure and are secured to
the unit by 10-32 screws (3/8” in length). The feet must
be positioned vertically (refer to Figures 2.2 & 2.3).
The controller is wired to transmitters through EMT
connectors positioned at the bottom of the enclosure.
The EMT connectors prevent moisture from entering
the enclosure. The controller must be wired using
shielded twisted pair cable (with the shield tied to earth
ground) to achieve maximum RFI/EMI immunity.
NOTE
Use only U.L. listed or recognized conduit hubs that have
the same or better environmental rating as the enclo-
sure. Conduit hubs must be connected to the conduit
before being connected to the enclosure.
2.1.1
Terminal Designations
Wiring terminals are located on the Main (bottom) PCB.
They are designated as follows (see Figure 2.1):
Audible Alarm (J5)
The local alarm buzzer is factory wired. The local alarm
buzzer is located at the bottom of the controller hous-
ing, on the outside of the case.
Reset Switch (J4)
The Reset Switch is factory-wired. The switch is located
on the bottom of the controller housing, on the outside
of the case.
AC Power To Controller (J2)
The controller is wired to an AC power source through
these terminals. The terminal marked LO is used for the
neutral AC wire. The terminal marked HI is used for
the hot AC wire. The middle terminal is not used.
NOTE
When wiring the controller to a permanent A.C. source,
the A.C. source circuit breaker and/or switch must be IEC
approved. The circuit breaker and/or switch must be near
the unit and marked as the disconnect device for the unit.
• Transmitter Power To Sensors (J8-J11)
This terminal is used to wire the controller to the
transmitter. A simplified wiring diagram showing how
the controller is wired to the transmitter is shown in
Figure 2.6). The terminals are wired as follows:
24V wire connects to the Positive Power on the
transmitter.
4–20 mA IN signal wire connects to the 4–20 mA
Signal Output terminal on the transmitter.
Power Return (PWR RTN) wire connects to the
Power Return terminal on the transmitter (3-wire
transmitters only).
• 4–20 mA Output (J6)
4-20 mA output is available for external devices for
each of the 4 channels. Each output can be indepen-
dently changed from 4-20 mA to 1-5 Volts using the
jumpers at JP1–JP4.
In addition, each channel output can be adjusted by
potentiometers VR1-VR4 for increased accuracy.
• 24 Vdc Battery Backup (J3)
A DC battery backup can be wired to controller. The
battery backup is wired as follows:
POS wire connects to the positive (+) terminal on
a 20-26 Vdc battery backup.
RTN (Power Return) connects to the negative (–)
terminal on a 20-26 Vdc battery backup.
There is fuse diode protection incorporated within the
unit such that reversing the wiring of the backup sup-
ply will not do any damage, but will merely burn out
the fuse. The backup supply must have an output of
20–26 Vdc @ 2 1/2 amp.