Catalog 1308242
Issued 3-03 P&B
CH series
Mid- To Low-Priced
CMOS IC Time Delay Relay
Choice of timing modes
Delay on operate
Delay on release
Interval on
Fixed or knob adjustable types
10A output relay with DPDT contacts
Various models time from 1 to 180 sec.
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.
Contact Data @ 25C
Timing Modes
Arrangements: 2 Form C (DPDT).
Delay on operate Delay period begins when input voltage is applied. At
Material: Silver-cadmium oxide alloy.
the end of the delay period, the relay will operate and will not release until
Rating: 10A @ 30VDC or 277VAC, resistive; 1/2 HP @ 250VAC; 1/3 HP @
input voltage is removed. Reset occurs when input voltage is reapplied.
120VAC.
INPUT ON
Expected Mechanical Life: 10 million operations.
VOLTAGE OFF
Expected Electrical Life: 100,000 operations, min., at rated load.
N.O. RELAY ON
TIME
CONTACTS OFF
Initial Dielectric Strength
Between Open Contacts: 500V rms, 60 Hz.
Between All Other Conductors: 500V rms, 60 Hz.
Delay on release Input voltage must be applied continuously to operate
the internal relay. When the control switch is closed, the relay energizes.
When the control switch is opened, timing begins. When timing is
complete, the relay will de-energize. Time may be reset to zero during
timing by closing the control switch.
Input Data @ 25C
CONTROL ON
Voltage: 24 through 240VAC and 24VDC.
SWITCH OFF
Power Requirement: AC Types: Typically less than 3 VA.
N.O. RELAY ON
TIME
DC Types: Typically less than 3 W.
CONTACTS OFF
Transient Protection: Yes.
Reverse Voltage Protection: Yes.
Input Voltages & Limits @ 25C
Voltage Nominal Minimum Maximum
Type Voltage Voltage Voltage
Interval on The relay energizes and timing begins when input voltage is
applied. At the end of the time delay period the relay will de-energize.
Reset is accomplished by removing, then reapplying, the input voltage.
AC 24 20 28
120 105 130
INPUT ON
240 210 260
VOLTAGE OFF
DC 24 20 32
Note: DC voltage must be filtered (5% p-p ripple max. at nom. voltage).
N.O. RELAY ON
AC models will operate on 50 or 60 Hz.
TIME
CONTACTS OFF
Environmental Data
Timing Specifications
Temperature Range: Storage: -55C to +85C.
Operating: -10C to +55C.
Timing Ranges: From 1 to 180 sec.
Timing Adjustment: Fixed and knob adjustable.
Tolerance (for AC units add 1/2 cycle 60 Hz.):
Knob Adj. Types:0, +20% of max. specified at high end of timing range;
Mechanical Data
min. specified, or less, at low end.
Fixed Types: 5%. Termination: 8- or 11-pin octal style plug.
Res. Adj. Types: 5% at high end of timing range; min. specified, or less,
Enclosure: White plastic case. Knob adjustable types have dial scale for
at low end. reference only.
Delta Time (for AC units add 1 cycle 60 Hz.): 10%.
Sockets: Models with 8-pin base fit either 27E122 or 27E891 (snap-on)
Repeatability (for AC units add 1 cycle 60 Hz.): 2%. screw terminal sockets. 11-pin types fit either 27E123 or
Release Time: 125 ms, typ.; 200 ms, max.
27E892 (snap-on) screw terminal sockets.
Recycle Time: 125 ms, typ.; 200 ms, max. Weight: 6 oz. (170g) approximately.
Dimensions are shown for Dimensions are in inches over Specifications and availability www.tycoelectronics.com
reference purposes only. (millimeters) unless otherwise subject to change. Technical support:
1226
specified. Refer to inside back cover.Catalog 1308242
Issued 3-03 P&B
Ordering Information Authorized distributors are more likely to stock boldface items listed below.
Delay on Operate Models Delay on Release Models
Voltage Time Adjustment Wiring Dia. Part Number Voltage Time Adjustment Wiring Dia. Part Number
24VAC 1 to 10 Sec. Knob 1 CHB-38-30001 24VAC 1 to 10 Sec. Knob 3 CHB-38-30011
1 to 180 Sec. CHB-38-30003
1 to 10 Sec. CHB-38-70011
1 to 10 Sec. CHB-38-70001 120VAC 1 to 60 Sec. Knob 3 CHB-38-70012
120VAC 1 to 60 Sec. Knob 1 CHB-38-70002 1 to 180 Sec. CHB-38-70013
1 to 180 Sec. CHB-38-70003
24VDC 1 to 10 Sec. Knob 3 CHD-38-30011
120VAC 10 Sec. Fixed 1 CHA-38-70001 1 to 180 Sec. CHD-38-30013
240VAC 1 to 10 Sec. Knob 1 CHB-38-80001
Interval on Models
1 to 10 Sec. CHD-38-30001
24VDC 1 to 60 Sec. Knob 1 CHD-38-30002
Voltage Time Adjustment Wiring Dia. Part Number
1 to 180 Sec. CHD-38-30003
1 to 10 Sec. CHB-38-70021
120VAC 1 to 60 Sec. Knob 1 CHB-38-70022
1 to 180 Sec. CHB-38-70023
24VDC 1 to 10 Sec. Knob 1 CHD-38-30021
Outline Dimensions
2.406 MAX.
(61.1)
2.937 MAX. .56 1.781 MAX.
.60
(14.2)
(74.6) (45.2)
(15.2)
Wiring Diagrams Bottom Views (pins numbered clockwise from keyway)
EXTERNAL RESISTOR
EXT SWITCH*
_ _
+ +
+ INPUT
-
INPUT
(DC POLARITY INDICATED)
(DC POLARITY INDICATED) AC INPUT
Fig. 1 Fig. 3
Fig. 2
8 Pin 11 Pin
11 Pin
* If control switch is closed when power is applied, relay will immediately energize. A 50 millisecond minimum switch closure is required. IMPORTANT: 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.
** Note: Input polarity for DC operation. For most reliable operation on AC, connect high side to + and low side to .
Dimensions are shown for Dimensions are in inches over Specifications and availability www.tycoelectronics.com
reference purposes only. (millimeters) unless otherwise subject to change. Technical support:
1227
specified. Refer to inside back cover.