Potter PFC-6075R - Manual (Page 33)

3-27
PFC-6075R • 5403594 • REV D • 9/14
I/O Circuit Configuration
The PFC-6075R is equipped with two (2) I/O circuits that may be configured as either input or output devices. The panel has
ground fault detection on the I/O circuits. The impedance to ground for ground fault detection is 0 ohms.
Note: The I/O circuits only operate as Class B. Refer to the figure shown below for a wiring example of an I/O circuit
configuration.
Figure 27. Example of I/O Circuit Wiring
I/O 1 I/O 2
- + - +
5.1k EOL
Part #3005013
Notification
Appliance
5.1k EOL
Part #3005013
Normally Open
Dry Contact
I/O Circuits as Inputs
When configured as inputs, the I/O circuits are used as a dry contact monitoring input.
Input Configuration Characteristics:
y y Maximum allowable wire length is 10,000 feet.
y y The selection of the contact input functions are the same as the MCM and SCM-4 modules.
I/O Circuits as Outputs
When configured as outputs, each I/O circuit is rated for one (1) amp continuous current at 2.4 VDC.
Output Configuration Characteristics:
y y Supervised and regulated by the main panel board.
y y Reverse polarity upon activation.
y y Circuits are power limited
y y Type of output is selectable. Strobes can be synchronized with all compatible strobe devices, including Potter/AMSECO®,
Cooper Wheelock®, Gentex®, or System Sensor®.
I/O Maximum Impedance Formula
The maximum impedance is a function of the load placed on the circuit. To calculate the maximum impedance, use the following
formula:
(Alarm Current of Notification Appliances) x (Wire Resistance) < 3 Volts
DWG #602-7A