DE6205  1 
 
CL-8A, CL-8A T 
Microprocessor Controlled Digital Keypads 
Installation Instructions 
 
1. INTRODUCTION
1.1 Description 
The CL-8A and CL-8A T (version with tamper 
switch) are digital, code-operated keypads for 
indoor access control and remote control 
applications. The keypad can function with virtually 
every security control panel on the market, and is 
suitable for surface mounting or flush mounting in a 
standard single-gang switchbox.  
 
1.2 Features 
•  Self-contained, suitable for flush and surface mounting; 
supplied with a surface mounting box. 
•  Includes a 10 A relay, which operates the door strike or 
performs any desired switching function. 
•  Programmable on site by use of its own keyboard. 
•  Non-volatile EEPROM stores programmed data; 
unaffected by power failure. 
•  Up to 56 different 1-8 digit user codes can be programmed. 
•  More than 100 million code combinations are possible. 
•  User codes may be individually deleted. 
•  Programmable AUXILIARY open-collector output with seven 
powerful operating modes. 
•  Each user code programmable to operate the RELAY, or the 
AUXILIARY output, or BOTH. 
•  Programmable relay contact closure duration; toggle (latch/ 
unlatch) mode may be selected if required. 
•  PANIC  output triggered by pressing the # and 
*
 keys 
simultaneously. 
•  Three built-in LED indicators.  
•  REQUEST TO EXIT remote input trips the relay with a remote 
switch or a detector. 
•  A penalty timer locks out the keypad for 30 seconds after 
three consecutive inputs of erroneous codes. 
•  An AMBUSH  digit, if entered after the last digit of the user 
code, sends a one-second pulse to the
 PANIC output.  
•  9 to 16 or 22 to 26 Volts AC/DC operation. 
•  Tamper switch option available. 
 
2. SPECIFICATIONS 
Code composition: 1 to 8 digits, any combination 
Keypad type: 12 keys, 3 X 4, tactile operation 
Operating voltage: 9-16 or 22-26 V AC/DC, selected with jumper 
Current drain: 15 mA in the standby state, 55 mA with relay and 
AUXILIARY output active 
Power failure immunity: EEPROM retains all programmed 
information even during total power loss 
Other protections: Watch-dog protection from processor hang-up. 
Relay control: Programmable for 1 – 98 seconds pull-in duration, 
or for toggle (latching/unlatching) mode 
Relay contact rating: 10 A / 30 VAC or DC 
AUX and PANIC output current sinking: Up to 100 mA (each 
protected by an 18 ohm series resistor) 
LEDs: Green indicates keypad status 
  Red and yellow have 1K ohm series resistors and 
  terminals for external connections 
Operating temperature range: -20°C to 65°C (-4°F to 149°F) 
Size (H x W x D): 118 x 72 x 33 mm (4-5/8 x 2-3/16 x 1-3/8 in.) 
Weight: 122 g (4.3 oz) 
Color: White 
 
 
3. INSTALLATION 
3.1 Mounting 
Do not install outdoors! Flush mounting is possible in standard, 
single-gang electrical switch boxes (see Figure 1), without the 
original back box. For surface mounting, use the back box 
supplied with the unit (Fig. 2). 
LOCKING
SCREWS
STANDARD, SINGLE-GANG
ELECTRICAL SWITCH BOX
 
Figure 1. Flush Mounting 
MOUNTING
KNOCKOUTS
WIRING
KNOCKOUT
MOUNTING
KNOCKOUTS
BACK BOX
LOCKING
SCREWS
WIRING
KNOCKOUT
(1 OF 2)
 
Figure 2. Surface Mounting 
3.2 Wire Gauges and Routing 
Use # 20 AWG or larger diameters for relay connections to the 
door strike, to the control panel or any other system used. All 
other connections are to be made with # 22 AWG or larger. Route 
the wires through the wiring knockouts on the back box. 
3.3 Wiring 
IMPORTANT! Before wiring be sure to set jumper JP3 in the position 
that corresponds with the power source you are using: 
9 - 16 Volts - mount the jumper across the two pins of JP3. 
22-26 Volts - remove the jumper or mount it on a single pin of JP3.  
The connections to the terminal block are shown in Figure 3. 
–
+
N.O.
+
BUZ.
OR
REL.
DOOR
STRIKE
OR
RELAY
MAG-
NETIC
LOCK
12V OR 24 V
AC / DC POWER
SUPPLY FOR
THE CL-8
6 - 28 V AC / DC
DOOR CONTROL
POWER SUPPLY
+12 OR 24 VDC
RED LED YEL. LED
+
–+
+
–
BUZ.
OR
REL.
–
IMPORTANT:
 when a 12 VAC
power source is used, LEDs
connected to the PANIC or AUX
open-collector outputs will light
normally when the output pulls
down. Buzzers will not function
properly, and should therefore
be avoided.
When a 24VAC power source is
used, neither LEDs nor buzzers
should be connected to the
PANIC and AUX outputs.
123456789101112
JP1
JP3
1K 1K
18
Ω
18
Ω
100 mA MAX.
100 mA MAX.
OPTIONAL TERMINAL BLOCK FOR CONNECTING OUTDOOR
KEYPAD KB-81 OR KB-82 (SEE PUBLICATION DE6215-)
*
**
***
 
Figure 3. Terminal Block Wiring