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1.3.2.6
I/O specifications
The table below lists the voltage specifications of the digital input and output ports.
Mode
Digital Input (DI-1 and DI-2) Trigger voltage (high)
Digital Output (DO)
1.3.2.7
Connecting serial devices
The NTC-400 Series Router features one RS-232 serial port with RX and TX signals located on the terminal block as shown
below.
1.3.2.8
Connecting to the network via Ethernet
The NTC-400 Series Router provides three RJ-45 10/100/1000 Mbps Ethernet ports with auto-MDIX. WAN/LAN1 may be used
as either a LAN port or a WAN port. By default, it is configured as a LAN port. See the WAN & Uplink section for details on
configuring a WAN connection.
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Logic level 1: 5 V to 30 V
Normal voltage (low)
Logical level 0: 0 V to 1.0 V
Voltage (Relay mode) Logic level 1: Depends on external device.
Maximum voltage is 36 V.
Logic level 0: Floating, External pull-down resister
(10 K Ohm, ½ W) is required.
Maximum current
1 Amp @ 12 V, or 0.33 Amp @ 36 V
Table 3 – I/O specifications
Figure 5 – Serial pins on terminal block
Specification
Note DO power is relayed from the "PWR" pin
on the 8-pin terminal block connector.
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