Spec No. 1604 | Rev. 06.09.16 | pg. 1/3
Heard Everywhere Since 1947
Model No's.
SEQR-4, SEQR-4K
4-Step Rackmount Sequencers
Low voltage, 4-step sequencers provide time-delayed activation and
deactivation of equipment connected to remote power controls or accessory systems. The 1U chassis mounts in minimal rack space to sequentially activate equipment connected in the same rack or in remote
locations. Select rocker or key activation switch.
Features
•
Front mounted LEDs indicate status of connected equipment; front
adjustable delay allows .5-10 seconds between steps.
•
Contacts for connecting remote switches
•
Each of the four control outputs includes switch contacts for connection to remote power control-activated equipment and auxiliary
dry contacts for sequentially activating accessory systems such as
projector screens, lighting, etc.
•
•
•
•
•
SEQR-4
Four rear-access barrier strip control outputs
Alarm interface for use where required by local building code.
SEQR-4K
Steel chassis with rocker or key switch. 19"W x 1.75"H x 9"D. Black.
UL Listed power supply with input 100-240VAC, output 24VDC,
500mA, 6 ft. cord and four plug adaptors — NEMA 1-15 for North
America (factory installed) Schuko CEE 7/16 for central Europe,
BS1362 for the U.K., AS3112 for Australia/New Zealand.
Made in U.S.A. with domestic and imported components
A&E Specifications
Operation
To Sequentially Activate Equipment: Connect each sequencer output
(terminals labeled “Common” or “Switched Relay”) to a Remote Power
Control (RPC Series) via a 2-conductor cable. Equipment to be switched
on/off is plugged into the appropriate RPC. Each sequencer output can
control up to 10 RPCs.
To Sequentially Activate Accessory Systems or Indicator Devices:
Each control output includes accessory contacts (Normally closed, Common,
Normally open) with a rating of 5A for connection to peripheral devices.
To Operate the Sequencer Remotely: Rear panel contacts can connect optional switch (up to 8 in parallel) using a 3 conductor wire. Lowell
offers wall plate or rackmount switches with rocker or key activation.
Order momentary switches separately.
The device for sequentially activating equipment shall be Lowell rackmount Model No. ________, which shall feature front _______ (rocker,
key) actuation switch _________, LEDs and accessible trim pot for 4step delay adjustment of sequence operation. The rear panel shall feature four barrier strip terminals for remote power control units and dry
auxiliary contacts for accessory devices. Equipment to be controlled
shall be connected to the sequencer using 2-conductor wire and Lowell
Remote Power Control No. __________ (RPC Series, order separately). The rear panel shall include contacts for connecting an optional
momentary style switch No. __________ (RPSW-M or RPSB-M Series, order separately) for remote operation of the sequence controller.
The unit shall be equipped with an alarm interface for use where required by local building code.
Lowell makes every effort to provide accurate information while reserving the right to change specifications and/or improve manufacturing methods without notification.
©2015 Lowell Manufacturing Company, 100 Integram Dr., Pacific MO 63069 | tel. 800.325.9660 | www.lowellmfg.com
Spec No. 1604 | Rev. 06.09.16 | pg. 2/3
Heard Everywhere Since 1947
Front Panel
Red LED
flashes when system is cycling down and
remains lit when system is off.
Green LED
flashes when system is cycling up and remains lit when
system is on.
Actuation switch (rocker or key depending on model). Activation in mid-cycle
reverses direction.
Green LEDs indicate sequence progress.
Delay: recessed trim pot with screwdriver adjust.
Rear Panel
Auxiliary Dry Contacts*
Normally Closed
Common
Normally Open
Includes four
plug adaptors.
NEMA 1-15 is
factory-installed.
*Can be used to control
other systems (lighting,
etc.) or indicators. Contact rating = 5A max.
Switch Contacts for Remote Power Controls**
Common
Switched Relay
RPSW-MP
RPSW-MKP
**Up to 10 RPCs can be controlled by each
sequencer step. (common connections from
multiple remote RPCs controlled by different
sequence steps can be consolidated into 1
conductor and connected to any common
terminal at the sequencer.)
Alarm
Interface
Alarm Interface: If required by local building code, facility usage, or Fire Marshal, the
system switches can be overridden and the
system controlled by contact closures provided on the fire alarm panel or other similarly installed device. A maintained contact
between the “Com” terminal and any of the
terminals shown will provide the following
functions:
LOCK OFF: A maintained contact between the “Com” terminal and
the “Lock Off” terminal will turn the system off and keep it off regardless of other switch activations. If the system is already off it will remain off.
Optional Remote Switches
Optional Remote Switch
Connection: Up to 8
momentary switches can
be connected in parallel.
Maximum wire distances
for momentary switches:
24 ga. = 20,000 ft.
22 ga. = 31,200 ft.
18 ga. = 76,800 ft.
LOCK ON: A maintained contact between the “Com” terminal and
the “Lock On” terminal will turn the system on and keep it on regardless of other switch activations. If the system is already on it will remain on.
SWITCH LOCK: A maintained contact between the “Com” terminal
and the “Switch Lock” terminal will lock the system in its current state
(on or off) regardless of any other switch activations.
CAUTION: Do not allow alarm system to make more than one of the
above described contacts at the same time. Controller board damage
could result.
Lowell makes every effort to provide accurate information while reserving the right to change specifications and/or improve manufacturing methods without notification.
©2015 Lowell Manufacturing Company, 100 Integram Dr., Pacific MO 63069 | tel. 800.325.9660 | www.lowellmfg.com
Spec No. 1604 | Rev. 06.09.16 | pg. 3/3
Heard Everywhere Since 1947
Typical Application
Sequencer Model Numbers
Model No.
SEQR-4
SEQR-4K
Description
4-step rackmount sequencer
4-step rackmount sequencer
Note: Sequencers formerly known as No's. SCS-4R and SCS-4RK
Activation Switch
Rocker
Key
Delay (front panel trip pot)
0.5-10 sec. between steps
0.5-10 sec. between steps
Power Requirement
100-240 VAC 500mA max
100-240 VAC 500mA max
System Accessories (order separately)
Remote Power Controls (stand-alone units)
RPC-15
Power Control — 15A, 1 duplex outlet, 7.5 x 3.25 x 1.75, 6 ft cord
RPC-20-CD
Power Control — 20A, 1 duplex outlet, 7.5 x 3.25 x 2.75, 6 ft cord
RPC-20-SCD
Power Control — 20A, 1 duplex outlet, 7.5 x 3.25 x 2.75, surge suppression, 6 ft cord
RPC-30-SHW
Power Control — 30A, 1 twistlock outlet, 7.5 x 3.25 x 2.75, 6 ft conduit
Power Strips with Remote Power Control
ACS-1510-RPC
30" power strip with 10 (15A) outlets, detachable cord and remote power control
ACS-2010-RPC-HW
30" power strip with 10 (20A) outlets, flexible conduit (hardwired), and remote power control
Surge Suppressors with Remote Power Control
ACSP-1502-RPC
Compact Surge Suppressor with remote power control, 2 (15A) outlets, cord
ACSP-2002-RPC
Compact Surge Suppressor with remote power control, 2 (20A) outlets, cord
Remote Switches with MOMENTARY Closure (multiple switch use). Key versions also available.
RPSW-MP
Momentary Switch (1 gang wall plate) — SPST rocker switch with 1 LED
RPSW2-MP
Momentary Switch (1 gang wall plate) — SPST rocker switch with 2 LEDs
RPSB-MR
Momentary Switch (1U rack panel) — SPST rocker switch with 1 LED
RPSB2-MR
Momentary Switch (1U rack panel) — SPST rocker switch with 2 LEDs]
Visit our website for additional system accessories.(www.lowellmfg.com)
Lowell makes every effort to provide accurate information while reserving the right to change specifications and/or improve manufacturing methods without notification.
©2015 Lowell Manufacturing Company, 100 Integram Dr., Pacific MO 63069 | tel. 800.325.9660 | www.lowellmfg.com