8.1.2 Binary outputs
The unit has one (1) binary output: BO1 (+24 VDC). The binary output function can be configured with
the DIP switches. For more information on the configuration, please refer to the "DIP switch settings"
chapter.
Please note that the binary ouput is polarity-sensitive (see the "Wiring" chapter for more information).
8.1.3 System failure relay
The system failure (SF) relay is of the change-over type (NO/NC) and it is energized when the unit is in
a healthy condition. Whenever the unit detects a system error or a disconnection between the auxiliary
power supply and the contacts, the SF relay changes its state. The state stays this way until the unit
returns to a healthy condition and the SF relay is energized again.
8.2 Inputs
8.2.1 Arc sensor channels
Both AQ-101 and AQ-101D have four (4) arc point sensor channels: S1, S2, S3 and S4. You can
connect a maximum of three (3) arc point sensors to each channel.
S5 is the optional fiber optic loop sensor channel with a transceiver (Tx) terminal and a receiver (Rx)
terminal. When the fiber optic loop sensor is connected to the unit, one of its ends is connected to "Tx"
and the other to "Rx". This sensor loop is then continuously monitored by a test light pulse that travels
through the loop. If a discontinuity is detected, the unit goes into Error mode and activates the "Error"
LED and the SF relay output.
For more information on sensors, please refer to the "Arc sensors" chapter as well as to the AQ-0x
instruction booklet which can be found on Arcteq's website (
https://www.arcteq.fi/downloads/
8.2.2 Binary inputs
This unit contains two (2) binary inputs.
BI1 is always reserved for the signal from the secondary trip criterion. Typically, the unit receives
overcurrent information from an AQ-110x unit, although such information can also come from a non-
Arcteq device (such as an upstream protection relay). Alternatively, any other signal (such as
undervoltage) can be used as a secondary trip criterion along with light information.
Please note that when this unit receives an overcurrent signal from a non-Arcteq device, the actual
operating time depends on the operating time of the third-party device. Therefore, the total operating
time cannot be specified nor guaranteed.
BI2 can be used for receiving a trip signal or an arc light signal. The function of the BI2 is configured
using the DIP switches. For more information, please refer to the "DIP switch settings" chapter in this
manual.
The binary inputs are activated when a connected DC signal exceeds the specified nominal threshold
level of the corresponding input. There are three (3) different nominal threshold levels
available: 24, 110, or 220 VDC. Please note that the threshold value must be chosen and specified
when ordering the unit. Please note that the actual activation of the binary input occurs earlier than the
specified nominal threshold value (see Chapter 11.4, "Techical Data").
A
AQ
Q-101 (A
-101 (AQ
Q-101D
-101D))
Instruction manual
Version: 2.01
© Arcteq Relays Ltd
IM00006
31
