Specification

CATALOG INFORMATION
PP-20
PP-20-2P
SP-20
PLENUM CONSIDERATIONS
Most local codes allow for small plas-
tic controls in Return Air Plenums;
Some Do Not! To meet local code,
the Power Pack can be mounted
inside an adjacent (Deep) junction
box as shown below.
120/277 VOLT
POWER PACKS AND SLAVE PACKS
Plenum Rated
P
ower Packs are the heart of the Low Voltage Sensor System. The PP-20 trans-
forms 120, 240 or 277 Volts (single phase) to class II 15 VDC to power the remote
sensors. Utilizing Patented Relay Circuit Protection the PP-20 also switches the
lighting load "On" and "Off": Tested to over 400,000 cycles at rated load! Although
Plenum Rated, the elongated mounting nipple allows for the PP-20 to be mounted
either directly thru a 1/2” inch knockout in a junction box, or to be located inside
an adjacent box for specic local code requirements. Up to 14 sensors may be
connected to one PP-20. Multi-circuit control can be handled by multiple PP-20's,
or 2-Pole Power Packs (PP-20-2P) and Slave Packs (SP-20) may be congured.
PP-20's can be wired continuously hot (line side), or on the switch leg (load side)
without nuisance delays upon turn "On".
LOW VOLTAGE OPERATION AND TEST
The Low Voltage Wires or Terminal is color coded Red (15 VDC), Black (Common),
and White (Occupancy Signal). With no sensors connected, using a small wire,
connect the Red terminal to the White. The lights should turn "On". Remove the
connection and the lights should turn "Off". With the sensors connected, the Red and
Black wires provide DC power to the remote sensors, and when there is occupancy
detected, the White wire produces a 15 VDC signal from the sensor to the power
pack initiating the lights to "On". Upon initial power up, the Sensors automatically
send an "On" signal until the sensors have stabilized and "Timed Out".
SIZING OF THE SYSTEM - VARIOUS COMBINATIONS
Combining Power Packs provides for additional power to drive remote devices. Maxi-
mum numbers of remote sensors are shown below based on the Power Pack/Slave
Pack being used. Maximum number of "Relays" is 30.
Sensors Sensors with Relay
1 PP-20 14 8
1 PP-20-2P 7 6
1 PP-20 w/SP-20 7 6
1 PP-20-2P w/SP-20 5 5
2 PP-20 28 16
2 PP-20-2P 14 12
Note 1: Only three relays may be controlled with one Power Pack. If more than
three circuits are required, multiple Power Packs must be used.
Note 2: Only one "Sensor with Relay" is required in most cases. See Technical
Datasheet on Low Voltage Sensors with -R Interface Option.
SYSTEMS CONSIDERATIONS
The local override switch may be upstream or downstream of a PP-20. However,
if an SP-20 Auxiliary Relay or a PP-20-2P controller is being used, the switch(es)
should be downstream on the load side of the relay. If power is disconnected to the
Power Pack all subsequent relays will open, turning off all of the loads. If wiring the
local switches before the Power Pack and Slave Pack, use multiple PP-20's, one for
each circuit. This will allow for one circuit to remain powered, keeping the system
operational when the other is turned off. When controlling a dimming circuit, PP-20
must be wired before dimmer, or SP-20 may be wired after dimmer.
INTERFACING WITH ELECTRONIC CONTROL SYSTEMS
The Relay Switching System is designed to switch Alternating Currents Only. The
relay will not switch DC signal inputs to EMS or Lighting Control Systems. Use model
#MP-20, or "-R" for signal relay located in Low Voltage Sensor Heads.
PP-20
PP-20-2P
SP-20
Power Pack with 20 Amp Relay
Power Pack with two 20 Amp Relays
Slave Pack with 20 Amp Relay
15 to 24 VDC
15 to 24 VDC
N/A
70 to 110 mA
35 to 70 mA
40 mA (consumption)
MODEL# DESCRIPTION OUTPUT VOLTAGE OUTPUT CURRENT
**Add sufx -LT for Low Temp/Hi Humidity
TYPICAL APPLICATIONS
• Used with Low Voltage Sensors
• Multiple Sensors
• Multiple Loads
• AC Switching Only
HIGHLIGHTS
• Dual Voltage Transformer
• Self-Contained Relay
• Patented Relay Circuit Protection
(Tested to over 400,000 cycles)
• Powers up to 14 sensors
SPECIFICATIONS
• Size:(1/2” inch chase nipple not inc.)
PP-20-2P: 4
1
/8 x 3” x 1
7
/8”
PP-20 & SP-20: 3” x 2
1
/4” x 1
7
/8”
• Mounting: 1/2” inch chase nipple
• Operating Voltage: 120, 240, or
277 VAC (Single Phase only)
• Each Relay: 20 Amps
• 1 HP Motor Load
• Output Voltage: 15 VDC, 150 mA
at 120 or 277 VAC
• Class II: 18 AWG, up to 2,000 ft.
• Plenum Rated
• Relative Humidity: 20 to 90%
non-condensing
• Operating Temp: 14º to 160º F
• Storage Temp: -14º to 160º F
• UL and CUL Listed
• 5 Year Warranty
• Made in U.S.A.
LOW TEMP/HI HUMIDITY(-LT)
• Conformally Coated PCB
• Operates down to -40º F
• Corrosion resistant from moisture