Aritech 2X-A Series - Connecting Inputs; Connecting Loop Devices

Chapter 2: Installation
36 2X-A Series Installation Manual
Connecting loop devices
Each loop can support up to 128 devices. For detailed loop device installation
information, see your device installation sheet.
Connecting inputs
Input functionality
Each control panel has two supervised inputs, marked INPUT1 and INPUT2. For
input configuration, see “Field configuration” on page 98.
Connecting inputs
Connect input switches to INPUT1 and INPUT2, as shown in Figure 14 on page
32. For input supervision (open and short circuit), install a 15 kΩ resistor.
If an input is not used, the 15 kΩ end-of-line resistor must be installed across the
unused terminals to avoid an open circuit fault on the input.
Input activation characteristics
Input activation characteristics are shown in the table below.
Table 15: Input activation characteristics
State
Activation value
Active
60.2 Ω ≤ active value ≤ 8 kΩ
Normal
10 kΩ ≤ value ≤ 20.2 kΩ
Short circuit
≤ 60.2 Ω
High impedance fault
8 kΩ < value < 10 kΩ
Open circuit
≥ 20.2 kΩ