Programming & function
TK9 keypad is a surface mount codelock with a code length from 2 to 8 digits. Access to programming by a six digit admin password. There is a jumper link to return to the factory admin code, but it does not clear the access codes.. A beeper gives confirmation of each key stroke. Incorrect codes give three beeps; correct codes give a green light. The relay on times are set from 1 to 9 secs. An exit button input also triggers the relay, but with the option of a different relay period.
Application
Connections are made to a 6 way screw terminal block. The volt free relay contact is either N.O. or N.C. set on a jumper link. Maximum relay switching is 1A resistive, suitable for small door locks, relays, or automation systems. A contact protector is provided for inductive loads. The exit button input operates the relay, envoking a different programmed timer setting. DC input voltage is tolerant to 32V. A zener voltage dropper may be used for 24Vac/dc supplies.
Construction
The codelock is in an extruded aluminium housing with a small black rain hood. Mount the extruded surface housing through slotted holes in the rear. There is good cable space for connections. Environmental protection is IP54. A heater is recommended to disperse condensation when used outdoors (330R 0.5W). The panel and keypad slides up into the housing, then the end cap is screwed on with 4 screws. The keys are aluminium with engraved numbers. Illuminated keys are an option on this codelock, stocked on request.