Relay Ports; Relay Connections; I/O Ports - AMX NetLinx NX Series Hardware Reference Manual

Relay Ports

The relay ports (port 21 on the NX-2200/3200/4200) are 8-pin 3.5 mm mini-Phoenix (male) connectors used for
connecting external relay devices. The NX-3200 and NX-4200 each features 2 sets of 8-pin relay connectors. The
NX-2200 features one set of connectors. You can connect up to 8 independent external relay devices on both the
NX-3200 and NX-4200 units, and 4 on the NX-2200. When a relay is "OFF", terminals A and B are open-circuit. When
a relay is "ON", terminals A and B are shorted together.

Relay Connections

Use connectors A for common and B for output (FIG. 23). Each relay is isolated and normally open.
A metal connector strip is also provided to common multiple relays.
NX-3200/4200
FIG. 23 RELAY connector (male)
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I/O Ports

The I/O ports (port 22 on all NX-series controllers) are 6-pin 3.5 mm mini-Phoenix (male) connectors used for
connecting logic-level outputs. The NX-3200 and NX-4200 each features 2 sets of 6-pin I/O connectors. The I/O port
responds to either switch closures, voltage level (high/low) changes, or it can be used for logic-level outputs. Each port is
capable of being used as an input or an output.
FIG. 24 displays the I/O ports for each NX-series controller.
NX-3200/4200
FIG. 24
I/O ports
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Hardware Reference Guide - NX-Series NetLinx Integrated Controllers
8-channel single-pole single-throw relay ports
Each relay is independently controlled
Supports up to 8 independent external relay devices (4 on the NX-2200)
Channel range = 1-8
Each relay can switch up to 24 VDC or 28 VAC peak @ 1 A
Two 8-pin 3.5mm mini-Phoenix (male) connector provides relay termination (One connector on the
NX-2200)
NX-2200
A contact closure between the GND and an I/O port is detected as a Push.
When used for voltage inputs, the I/O port detects a low signal (0 - 1.5 VDC) as a Push, and a high signal
(3.5 - 5 VDC) as a Release. (This I/O port uses 5V logic but can handle up to 12V without harm).
When used for outputs, the I/O port acts as a switch to GND and is rated for 200mA @ 12 VDC.
The NX-1200 and NX-2200 can use up to 4 I/O ports
The NX-3200 and NX-4200 can use up to 8 I/O ports
The PWR pin provides +12 VDC @ 200 mA and is designed as a power output for the PCS Power Current
Sensors, VSS2 Video Sync Sensors (or equivalent).
The GND connector is a common ground and is shared by all I/O ports. A common ground is shared with
I/O ports 1-8 (NX-3200/NX-4200) or with I/O ports 1-4 (NX-1200/NX-2200).
The input impedance on the I/O port is 22k.
NX-2200
Wiring and Connections
NX-1200
26