SSAC KRDB Digi-Timer Catalog Page
Dedicated
= Undefined time
timers
Delay On Break (Release)
KRDB Digi-Timer
Time Delay Relay
Description
The KRDB Series is a compact time delay relay measuring only 2 in. (50.8 mm) square. Its microcontroller
timing circuit provides excellent repeat accuracy and stability. Encapsulation protects against shock, vibration,
and humidity. The KRDB Series is a cost effective approach for OEM applications that require small size,
isolation, reliability, and long life.
Compact Time Delay Relay
Microcontroller Circuitry,
+/-0.5% Repeat Accuracy
Isolated 10 A SPDT Output
Contacts
Onboard or External
Adjustment or Fixed Time
Delay
Delays from 100 ms ...
1000 m in 6 Ranges
Input Voltages from 12...
230 V in 5 Ranges
+/-5% Factory Calibration
Approvals:
Accessories
B
External adjust
potentiometer
A
P/Ns:
P1004-95 (fig A)
P1004-95-X (fig B)
Versa-knob
P/N: P0700-7
Operation
Input voltage must be applied before and during timing.
Upon closure of the initiate switch, the output relay
energizes. The time delay begins when the initiate
switch is opened. The output remains energized during
timing. At the end of the time delay, the output deenergizes. The output will energize if the initiate switch
is closed when input voltage is applied.
Reset: Reclosing the initiate switch during timing
resets the time delay. Loss of input voltage resets the
time delay and output.
Connection
Function
Delay On Break
V = Voltage S1 = Initiate Switch R = Reset
NO = Normally Open NC = Normally Closed
TD = Time Delay
Mounting bracket
P/N: P1023-6
V = Voltage S1 = Initiate Switch
C = Common, Transfer Contact NO = Normally Open
NC = Normally Closed UTL = Untimed Load
Female quick
connect
P/Ns:
P1015-64
P1015-13 (AWG 10/12)
Quick connect to
screw adaptor
P/N: P1015-18
DIN rail P/Ns:
017322005 (Steel)
C103PM (Al)
→
DIN rail adaptor
P/N: P1023-20
See accessory pages for
specifications.
(AWG 14/16)
←
A knob is supplied for adjustable units. The
untimed load is optional. Relay contacts are
isolated. Dashed lines are internal connections.
Ordering Table
KRDB
Series
Example P/N:
X
Input
–1 - 12 V DC
–2 - 24 V AC/DC
–4 - 120 V AC
–5 - 110 V DC
–6 - 230 V AC
X X
Adjustment
–1 - Fixed
–2 - Onboard
Adjustment
–3 - External
Adjustment
KRDB421 = 120 V AC; Onboard adjust from 1 to 100 seconds
KRDB610.5S = 230 V AC; Fixed at 0.5 seconds
Time Delay *
–0 - 0.1 ... 10 s
–1 - 1 ... 100 s
–2 - 10 ... 1000 s
–3 - 0.1 ... 10 m
–4 - 1 ... 100 m
–5 - 10 ... 1000 m
* If Fixed Delay is selected, insert delay [0.1
… 1000] followed by (S) sec. or (M) min.
5.52 Low Voltage Products & Systems
1TRC 001 009 C0202 ABB Inc. • 888-385-1221 • Technical assistance 800-377-7722 • www.ssac.com
KRDBGen 08.14.06
Delay On Break (Release)
KRDB Digi-Timer
Time Delay Relay
Technical Data
Time Delay
Type Microcontroller with watchdog circuitry
Range 0.1 s ... 1000 m in 6 adjustable ranges or fixed
Repeat Accuracy +/-0.5% or 20 ms, whichever is greater
Tolerance (Factory Calibration) ≤ +/-5%
Recycle Time ≤ 150 ms
Initiate Time ≤ 40 ms
Time Delay vs. Temperature & Voltage ≤ +/-5%
Input
Voltage 12, 24, 110 V DC; 24, 120 or 230 V AC
Tolerance 12 V DC & 24 V DC/AC -15% ... +20%
110 V DC, 120 or 230 V AC -20% ... +10%
AC Line Frequency/DC Ripple 50 ... 60 Hz / ≤ 10%
Power Consumption AC ≤ 2 VA; DC ≤ 2 W
Output
Type Isolated relay contacts
Form Single pole double throw (SPDT)
Rating (at 40°C) 10 A resistive at 125 V AC
5 A resistive at 230 V AC & 28 V DC; 1/4 hp at 125 V AC
Max. Switching Voltage 250 V AC
Life (Operations) Mechanical -- 1 x 107; Electrical -- 1 x 105
Protection
Circuitry Encapsulated
Isolation Voltage ≥ 1500 V RMS input to output
Insulation Resistance ≥ 100 MΩ
Polarity DC units are reverse polarity protected
Mechanical
Mounting Surface mount with one #10 (M5 x 0.8) screw
Package 2 x 2 x 1.21 in. (50.8 x 50.8 x 30.7 mm)
Termination 0.25 in. (6.35 mm) male quick connect terminals
Environmental
Operating/Storage Temperature -40°C ... +60°C/-40°C ... +85°C
Humidity 95% relative, non-condensing
Weight ≅ 2.6 oz (74 g)
Dedicated
timers
Output Current/Ambient Temp.
External Resistance vs Time Delay
KRDBGen 08.14.06
Mechanical View
External Adjust Detail
Replaces Knobs if Ordered
Inches (Millimeters)
Low Voltage Products & Systems 5.53
ABB Inc. • 888-385-1221 • Technical assistance 800-377-7722 • www.ssac.com 1TRC 001 009 C0202
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