Open Collector Input Interface; Use The Output Interfaces; Gpio Output Specifications - Honeywell IF2 User Manual

+Input
-Input
Isolated Input Interface

Open Collector Input Interface

The input can be connected to an open collector interface of an external device.
This typically implies that the grounds are tied together for the two systems. The
common ground can be a source of input noise, so you should follow good ground-
ing practices for both the IF2 and the input device.
In this situation, the IF2 provides power to the pull-up resistor for the open collec-
tor. Connect the +Input pin to the +12 VDC source as shown in the next illustration.
+12 V
+Input
- Input
Ground
Open Collector Input Interface

Use the Output Interfaces

Each IF2 output interface is optically isolated from the IF2, polarized, and rated for
5 to 48 VDC at 0.25 A. All IF2 outputs include internal thermal fuses that trip if the
load exceeds 0.25 A, and the fuses are self-recovering once the excessive load is
removed. The high and low contacts are exposed and isolated from ground. Tran-
sient suppression limits output voltage spikes to 65 VDC.

GPIO Output Specifications

Signal
Leakage current (High)
V
IF2 Network Reader User Guide
Twisted
pair
(Low)
sat
External
input
switch
-
+
10-48 VDC
Description
Switch output, high leakage current
Switch output on, saturation voltage
with 0.25A load
Min. Typical Max.
0 mA 1 mA 10 mA
0V 1V 1.5V
57