Demand Moore Reliability 7
SPD
Programmable Field-Mount
Loop Display (NEMA 4X, IP66)
Installing the SPD
Installing the SPD in your loop involves mounting and
making the electrical connections. It is recommended
that the SPD be installed in the loop before it is
programmed so that you can use the input capture
features to capture the exact full and zero values of the
loop. (See Loop Connections) If this is not practical,
you can also use a variable current source and an
ammeter or multimeter to setup your unit before you
install it on the loop. (See Configuration Connections)
Mounting
The SPD comes prepared for field-mounting in a FH
enclosure.
Loop Connections
The recommended method of programming requires
you to install the SPD into the loop before you program
it. Figures 2 and 3 describe typical loop installations
of the 2.3VLP and 24DC SPD units.
To connect to the SPD, you will first need to remove
the side panel(s). Use a flathead screwdriver to
remove the four screws on the right side of the SPD. If
your SPD has the –2PRG option, you will also need to
remove the left side panel to give access to the alarm
relays.
Once the panels are open, make the electrical
connections as shown in Figures 2 and 3. When
connecting the SPD to the PC, it is essential that you
use the communications cable included with your SPD.
Note that 2.3VLP models with the –BL option require a
24Vdc power supply to power the backlight.
Note:
On the tag for the communications cable, it should
read “rev. D” or later. If it does not list a revision, then
it is an older Moore Industries cable, and may or may
not work properly with the SPD.
Device
Current Source
Power Supply
Multimeter
Communications
Cable
Screwdriver
Screwdriver
Specifications
Adjustable, Accurate to ±0.01% of reading
24Vdc (24DC or –BL models only)
Accurate to ±0.025% of reading
Isolated and non-isolated versions available
Slotted Tip, head width 5mm, maximum
Large, slotted tip
Table 1. Assembling the Necessary Equipment
Configuration Connections
To configure the SPD before attaching it to the loop,
you need a calibrated, adjustable current source
capable of discrete output levels in the 4-20mA range.
It should have a minimum accuracy of ±0.01%. Once
you have the required equipment (as shown in
Table 1), hook up the SPD according to either
Figure 4 or 5.
To connect to the SPD, you will first need to remove
the side panel(s). Use a flathead screwdriver to
remove the four screws on the right side of the SPD.
If your SPD has the –2PRG option, you may decide to
remove the left side panel to give access to the alarm
relays.
Once the panels are open, make the electrical
connections as shown in the appropriate Figure. When
connecting the SPD to the PC, it is essential that you
use the communications cable included with your SPD.
Note that 2.3VLP models with the –BL option require a
24Vdc power supply to power the backlight.
