Catalog 1308242
Issued 3-03
P&B
CNT series
Multifunction, Digital
Tim e Delay Relay/ Counter
• 10 programmable timing modes + 2 counting modes
• 0.1 sec. to 9,990 hr. programmable timing range
• 1 to 99,900 counting range
• LCD digital display
• Universal (24-240VAC/VDC) and fixed input types
• 10A output relay with DPDT contacts
• Thumbwheel switches for programming
File E22575
File LR15734
Users should thoroughly review the technical data before selecting a product part
number. It is recommended that user also seek out the pertinent approvals files of
the agencies/laboratories and review them to ensure the product meets the
requirements for a given application.
Input Data @ 25°C
Tim ing and Counting Modes
Voltage: Universal Input Type: 24 - 240V ±15% , 50/60 Hz. AC or DC.
Fixed Input Types: 120VAC ±15% , 50/60 Hz and 12VDC.
Pow er Requirem ent:
See the follow ing page for a com plete description of all program -
m able tim ing and counting m odes.
Universal Input Type: 10VA @ 240VAC; 5VA @ 120VAC; 1VA @ 24VAC.
10W @ 240VDC; 5W @ 120VDC; 1W @ 24VDC.
Fixed Input Types: 3VA @ 120VAC; 3W @ 12VDC.
Transient Protection: Yes.
Tim ing Specifications
Tim ing Ranges: 0.1 to 99.9 / 1 to 999 sec.; 0.1 to 99.9 / 1 to 999 min.;
0.1 to 99.9 / 1 to 999 / 10 to 9,990 hr.
Tim ing Adjustm ent: Digital adjustment via thumbwheel switches.
Tolerance: ±0.5% ±0.05 sec.
Reverse Voltage Protection: Yes.
Delta Tim e (for AC units add ±1 cycle 60 Hz.): ±0.1% ±0.05 sec.
Repeatability (Including first cycle of operation.): ±0.1% ±0.05 sec.
Reset Tim e (pow er interruption): 45 ms, typ.; 60 ms, max.
Minim um Pulse Width, Control: 50 ms.
Input Voltages & Lim its @ 25°C
Input
Type
Nom inal
Voltage
Minim um
Voltage
Maxim um
Voltage
Recycle Tim e: 45 ms, typ.; 60 ms, max.
Universal
Fixed
24-240VAC/VDC
120VAC
20.4VAC/VDC
102VAC
276VAC/VDC
138VAC
Counting Specifications
12VDC
10.2VDC
13.8VDC
Maxim um Count: 1 to 999; 10 to 9,990 (÷10); 100 to 99,900 (÷100).
Maxim um Count Rate: 100 counts per second.
Mim um um Pulse Width:Count (Control): 3 ms.; Reset: 3 ms.
Available Counting Functions: Operate at preset count and release at
preset count.
Note: DC voltage must be filtered (5% p-p ripple max. at nom. voltage).
AC models will operate on 50 or 60 Hz.
Environm ental Data
Tem perature Range: Storage: -20°C to +70°C.
Operating: -10°C to +55°C.
Contact Data @ 25°C
Arrangem ents: 2 Form C (DPDT).
Hum idity: 85% relative humidity, non-condensing.
Material: Silver-cadmium oxide alloy.
Rating: 10A @ 30VDC or 277VAC, resistive; 1/2 HP @ 250VAC; 1/3 HP @
120VAC.
Mechanical Data
Term ination: 11-pin octal style plug.
Expected Mechanical Life: 10 million operations.
Expected Electrical Life: 100,000 operations, min., at rated load.
Enclosure: Beige plastic 1/16 DIN case.
Sockets: Fits either 27E123 or 27E892 (snap-on) screw terminal sockets.
Weight: 4.3 oz. (122g) approximately.
External Control: CONTROL, RESET: Active on contact closure or solid
state switch closure to RETURN, 0-1.0VDC maximum
voltage level (see wiring diagrams for interface circuits.
Initial Dielectric Strength
Betw een Open Contacts: 1,000V rms, 60 Hz.
Betw een All Other Conductors: 1,500V rms, 60Hz.
Ordering Inform ation – Authorized distributors are m ore likely to stock boldface item s listed below .
Accessories
Universal Input Model
Part Num ber
Nam e
Description
Input Voltage
Part Num ber
CNT-35-96
SSA-24C667 Mounting Clip
Ratchet-fit clip slides onto CNT from behind
to secure CNT in panel mount applications.
24-240VAC/VDC
Fixed Input Models
Input Voltage
SSA-24C668 Protective Cover Clear, flexible cover slips snugly over bezel of
CNT to help protect against dust and moisture.
Part Num ber
Durable cover also helps prevent inadvertant
changes of programming switch settings.
12VDC
120VAC
CNT-35-26
CNT-35-76
Outline Dim ensions
Wiring Diagram s (Bottom View s)
(pins num bered clockw ise from keyw ay)
1.88
(47.8)
2.83
(71.9)
EXTERNAL CONTROL SWITCHES**
RESET
CONTROL
RETURN
.32
(8.1)
CONTROL
(COUNT)
RETURN
RESET
O
NC
N
USE SAME
FOR RESET
1.88
(47.8)
1. 76
(44.7)
1
11
1
11
A
1
1
1
H
_
INPUT*
_
+
INPUT*
+
*
Note: Input polarity for DC operation. For most reliable operation on AC, connect high side
.64
(16.3)
to “+” and low side to “–”.
** Im portant: A dry circuit switch is recommended. A “dry circuit” switch is one rated to
reliably switch currents of less than 50mA. Use of a switch rated for other
than dry circuit may result in failure of the time delay relay to function properly.
Fits 1.77 x 1.77 (45 x 45)
Panel cutout
3.15
(80.0)
Dimensions are shown for
reference purposes only.
Dimensions are in inches over
(millimeters) unless otherwise
specified.
Specifications and availability
subject to change.
www.tycoelectronics.com
Technical support:
Refer to inside back cover.
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