Omega Products PTC-21 User Manual
1
⁄16 DIN Multi-Programmable Timers
PTC-20 Series
U 1⁄16 DIN Cutout
U 3 Different Models:
• Standard
• High-Performance
• Repeat Cycle
U 4-Digit Dual-Line Display
Indicates Set Value and
Time Value
U All Models Offer Multiple
Field-Programmable
Modes For Operation
and Time Ranges
U NEMA 4 (IP65) Rated
for Use in Washdown
Conditions
U Universal AC Supply
Voltage (90 to 264 Vac)
or Optional 24 Vac/
Vdc Models
U 5 A Relay Output or
Open-Collector Output
U Industry-Standard 11-Pin
Socket Connection
If you are looking to outfit your control
panel with timers that have an
attractive LED display, consider
the PTC-20 Series, which delivers
functionality at competitive prices.
Designed to fit the correct timer to
your application, the PTC-20 Series
comprises 3 models. The PTC-21
base unit offers 5 field-selectable
operating modes and time ranges
as well as a host of other convenient
features. The high-performance
PTC-23 offers advanced functions,
such as dual setpoints and 1 ms
resolution. The PTC-22 provides a
repeat cycle (batch stop, batch continue)
and interval modes specifically
tailored for cyclical operations.
PTC-21
Panel Punches
Available, Visit
omega.com/
panelpunches
PTC-23
Impedance: 10 kΩ
Front-Panel Rating: IEC IP65
Operating Temperature: 0 to 55°C
(32 to 131°F)
Storage Temperature: -40 to 90°C
(-40 to 194°F)
Humidity: 5 to 95% RH, non-condensing
Memory: Non-volatile
Operation
Time Ranges: Hours, minutes, seconds;
hours, minutes; minutes, seconds
Repeat Accuracy: ±0.01%
Physical
Dimensions: 48 H x 48 W x 85 mm D
(1.89 x 1.89 x 3.35")
Display: Dual-line, 4-digit, 7-segment
LED, 8 mm H (0.31")
Mounting: Panel-mount 45 x 45 mm
(1.77 x 1.77"), cutout or DIN rail
Wiring Connection: Screw terminals
on an 11-pin socket
Weight: 100 g (3.5 oz)
Base Model PTC-21
Output: Timed relay, DPDT (5 A)
Operating Modes (Shown): On-delay,
off-delay, on-delay (interval), interval
and repeat cycle
All models
shown smaller
than actual size.
Repeat Cycle PTC-22
Inhibit: NPN or dry contact
Outputs:
Relay: 2 SPDT (5 A), 15 ms latency
Transistor: NPN
Open Collector: 30 Vdc, 30 mA max
Operating Mode (Shown):
Repeat Cycle: Batch stop, batch
continue and interval
High Performance PTC-23
Inhibit: NPN or dry contact
Outputs:
Relay: 2 SPDT (5 A), 15 ms max latency
Transistor:
NPN Open Collector: 30 Vdc,
30 mA max opto isolated
Operating Modes: 17 different
operating modes available (popular
modes shown)
SM
Extended Warranty
Program
OMEGACARESM extended warranty program
is available for models shown on this page.
Ask your sales representative for full details
when placing an order. OMEGACARE
covers parts, labor and equivalent loaners.
PTC-22
M
SM
General Specifications
Supply Voltage: 90 to 240 Vac,
50/60 Hz, or 24 Vac/Vdc
Power Consumption: <10 VA
Resolution: Settable for time values in
hours/minutes/seconds ranges
Inputs Start and Reset: NPN or dry
contact
Activation Time: 4 ms (24 Vac/Vdc units),
21 ms (85 to 264 Vac powered units)
To Order Visit omega.com/ptc-20 for Pricing and Details
Model No. Description
PTC-21 Standard timer
PTC-22 Repeat-cycle timer
PTC-23 High-performance timer
Comes complete with operator’s manual.
Ordering Example: PTC-21, standard timer.
OCW-2, OMEGACARESM extends standard 1-year warranty to a total of 3 years.
M-104
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