Dwyer DCT500A - Manual

Introduction
The Series DCT500A Timer Controller is a timing system for pulse-jet type dust col-
lectors or pneumatic conveying systems in either continuous or on-demand cleaning
applications. It is provided with either 4, 6, or 10 channels. The DCT500 was
designed for ease of installation in your dust collector system. For installations requir-
ing fewer channels than available on the board, a shorting plug is provided to allow
selection of the last used channel. Time-on and time-off settings are selected using
two potentiometers. High-limit and low-limit control inputs are provided for use with
on-demand systems. When used in a continuous mode the high-limit input is jumped.
For safety, the control circuitry including the control inputs and the last channel
jumper, is isolated from the power line.
Installation
Warning: Always install and service this device with the power off
and a lockout installed if required. Line voltages are exposed on the
board. As a result, this device is not intended to be installed in any open
location. It must be installed within an enclosure that meets appropriate
safety and local code requirements. Follow applicable safety proce-
dures when installing or servicing this product.
Warning: Always replace the fuse with the proper type and rating.
The fuse is Type 3 AG fast acting 3 Amp @ 250V. DO NOT use slow-
blow type fuses. Failure to comply with this requirement will pose a seri-
ous safety risk and will void manufacturer’s warranty.
Warning: As a permanently installed piece of equipment, a power dis-
connect switch, circuit, or other approved disconnect device must be
installed in close proximity to the installed board and within easy reach
of the operator. This disconnect device must include a label indicating
its function as a mains disconnect.
Power Requirements
The controller is designed for operation on 120 VAC 50/60 Hz power. The input volt-
age must be between 102 VAC and 132 VAC either 50 or 60 Hz. The solenoid loads
must be rated for 120 VAC operation.
Location
The system must be located in an enclosure that meets relevant safety standards and
electrical codes. There are no other special orientation requirements. Mount it using
the four mounting holes in the baseplate. The baseplate back is flush, so no special
spacers are needed to accommodate obstructions except for those imposed by the
location itself.
Installed screws and other mounting hardware must maintain a spacing of 0.250 in
(6.35 mm) from the circuit board.
CONNECT JUMPER TO LAST
CHANNEL USED
1 2 3 4 5 6 7 8 9 10
25
1
50
75 TIME OFF 100 125
150
175
200 SEC mSEC 50
100
150
200
250 300
350
400
450
500
TIME ON
R29 R31
D W YER
INSTR
UMENTS
MICHIGAN
CITY
, IN
INDUSTRIAL
C ONTR
OL
EQ
UIPMENT
LINE
INPUT
RA
TING
120
V A C
+ 10%-15%
50/60
HZ
SINGLE
PHASE.
T HIS
UNIT
MUST
BE
ENCLOSED
. U SE
NEC
C LASS
1 W IRING
RA
TED
60C/75C
. U SE
14-22
G A C OPPER
O NL
Y F OR
LINE
AND
L O A D C ONNECTIONS
.T ORQ
U E T ERMINALS
T O 5 IN.
LB
. R EPLA
C E F USE
W ITH
T YPE
3 A G
F A ST
A C TING
3 A MP
250V
ONL
Y . F AILURE
T O COMPL
Y
WITH
THESE
R EQ
UIREMENTS
W ILL
V OID
MANUF
A C TURES
W ARRANTEE.
WIRE STRIP GAUGE
0.250 IN. MAX
L1 L2 SOL 1 2 3 4 5 6 7 8 9 10
COM OUTPUTS (300 VA MAX)
DO NOT USE SLOW BLOW FUSES
LINE VOLTAGE
102 VAC TO 132 VAC MAX
50-60 HZ
05-443179-00 VER
0
HIGH
LIMIT
COM
LOW
LIMIT
POWER
ON
D16 4-1/4
[107.95]
4-7/8
[123.8]
1/16
[1.59]
1/2
[12.70]
1-21/64
[33.73]
6-3/4
[171.45]
6-1/4
[158.75]
FVN
1 .0.0
SPECIFICATIONS
Output Channels: 4, 6, & 10 channels.
Voltage Requirements: 102 to 132 VAC (~) 50 or 60 Hz.
Power Consumption: 1.8 W.
Input Power: 302 VA max.
Load: 300 VA max, pilot rating C300.
Fuse: Type 3 AG, 3A @ 250 VAC (~).
Ambient Operation Temperature: -40 to 149°F (-40 to 65°C).
Storage Temperature: -40 to 176°F (-40 to 80°C).
Humidity Conditions: 5 to 95% noncondensing.
On Time: 50 to 500 msec.
On Time Accuracy: ±5% of setting.
On Time Repeatability: ±1 msec.
Off Time: 1 to 180 seconds.
Off Time Accuracy: 5% of setting.
Pollution Degree: 2.
Altitude: 6560 ft (2000 m) max.
Environment: Indoor use, must be installed in a weather-proof enclosure for out-
side applications.
Weight: 9 oz (255 g).
Agency Approvals: UL, cUL, CE.
Connections
The line and solenoid connections are located at the lower edge of the board. The
terminal block is a “Euro” style connector system that clamps the wire within the con-
nector body. The connector will accept wire sizes from 14 to 22 gages. Wire must be
copper only with at least 60°C or 60/75°C rated insulation. These terminals should be
torqued to 5 in. lb. The connectors are specified for single connection but multiple
wires may be connected to a single lug provided local codes allow this and good
workmanship practices are followed. When using stranded wire, make sure that there
are no “stray” strands. These pose safety hazards and may cause system failure or
damage. Connect the line power to L1 and L2. Connect the solenoids between the
selected output and the solenoid common. Solenoid common and L2 are internally
connected. Refer to Figure 2-1.
The wire should be stripped to no more than 0.25 in. A strip gauge is provided at the
lower right corner of the board. Longer than this may cause shorts or expose line volt-
ages to possible contact.
Switches connected to the control inputs at the top of the board must be isolated nor-
mally open contacts connected only to the relevant terminal and to the common ter-
minals.
The following subparagraphs describe the external switch connections. Refer to fig-
ure 2-1 for switch connection illustration.
Specifications – Installation & Operating Instructions
Series DCT500A Timer Controller BULLETIN E-98A
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-mail: [email protected]