Instruction Manual

SK-ACP Installation & Operating Manual

programmed using SK-NET™ software (see SK-NET™ manual, section 5.33) NOTE: Two MOVs (metal-oxide varis-

tors) are provided with each SK-ACP. These must be installed between the “Common” and either the “Normally Open”

or the “Normally Closed” terminals where power to the electric lock or strike is being switched (See Figures 6 and 7).

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FIGURE 5

RS-232

You may connect RS-232 communications to the SK-ACP either by using plug “J7”, terminals 1-5, or by plugging

into the RJ11 jack in the center of the circuit board. (See figure 3) RS-232 requires at least 5-conductor cable.

SUGGESTED CABLE IS Belden 6304FE. RS-232 is used to connect the COM port of a p.c. to a single SK-ACP,

or as a gateway to a network of SK-ACPs. (COM ports are typically DB9 male or DB25 male jacks on the back of

a personal computer.) When connecting a p.c. via RS-232 the distance from the panel to the computer should not

exceed 100’. (For longer distances, see “RS-485” below.) A serial printer may also be connected to the RS-232

port of any SK-ACP. This will allow all system transactions to be printed as they occur. (A printer may be

connected to one SK-ACP even if a computer is connected to another SK-ACP in the same network.) An

external modem might also be connected to the RS-232 port of an SK-ACP for dial-up applications using

SK-NET-MLD software. While any Hayes compatible 56K modem may be used, we highly recommend

that you use the Secura Key SK-MDM. The SK-ACP contains the configuration data, or “setup string”

which allows this modem to be configured in the field without the use of a computer and without setting

DIP switches. (See Appendix C for modem instructions.) Figure 5 shows the RS-232 pin connections for

a p.c., printer, or modem. WARNING: Never connect a telephone line directly to the RJ11 jack on an SK-ACP!