American Access Systems ProAccess 200sa - Manual (Page 28)

SK-ACP Installation & Operating Manual
3.0 System Using A Reader Gateway (PC to Unit RS232 port)
3.1 Recommended Wiring
1. Cable Type: Belden 6304FE, or equivalent (5 conductor shield, not twisted).
2. If you are using the a 28SA-Plus unit, the SK-NM 485 module must be installed into the reader. This
is not necessary for the SK-ACP.
3. DB9 Connector: verify wiring using a DB9 connector to the terminal block of the reader per figure 3.
4. DB25 Connector: verify wiring using a DB25 connector to the terminal block of the reader per figure 3.
3.2 Setup Location Properties
1. Select SK-NET™’s Explorer (Globe Icon).
2. Right click on the location name, and select Properties from the pull down menu.
Click on the “Connection” tab.
a) Be sure “Gateway(RS232)” and “Local Connect” are checked.
b) Click on the Connection Wizard icon.
c) Click on “YES”. Connection Wizard will try every COM port at every baud rate until the system is
located.
d) When asked to accept the settings, click on “YES”.
e) Click on “Connect”
3.3 Voltage Measurements
If you cannot connect, it will be necessary to take voltage measurements to identify whether the problem
is with the SK-ACP or with the computer.
1. From the Explorer screen, right-click on the Location.
2. Select Properties.
3. Click on the Connection tab.
4. Uncheck the box next to “Gateway (RS-232)”
5. Click on the Connect button.
The system will fail to connect, but in the process it will open the computer COM port, making a voltage test possible.
1. Voltages: Measure voltages at the gateway reader’s terminal block, communications pins 1 to 5.
Connect the ground lead to pin 1 (logic ground) for all measurements.
a) Pin 2 (Receive Data, RXD). The voltage should read between -5 VDC to -12 VDC. This voltage comes
from the PC. If the voltage is wrong or missing, disconnect the reader from the PC, and measure the
voltages at the reader (should be 0.0 VDC) and at the PC (should be between -5 VDC to -12 VDC).
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