Spectrex SafEye Xenon 700S, Руководство пользователя

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Electrical Specifications
TM 799200, Rev. (4), April 2017 39
4.2.4 Electrical Outputs
4.2.4.1 0
–20mA Current Output
The 0–20mA is isolated sink option. This output can be configured as a
source (see
Wiring Option Configurations , page 67).
The maximum permitted load resistance is 600 ohm.
Two 0–20mA options:
 Continuous reading – default (see Table 2)
 Discrete reading (see Table 3)
4.2.4.2 Communications Network
The detector is equipped with an RS-485 communications link that can be
used in installations with computerized controllers.
Communication is compatible with the Modbus protocol:
 This protocol is a standard and is widely used.
 The protocol enables continuous communication between a single
standard Modbus controller (master device) and a serial network of up to
247 detectors.
 The protocol enables connections between different types of SPECTREX
detectors or other Modbus devices to the same network.
4.2.4.3 Relay Output
The detector may include up to 3 of the following relays depending on the
wiring configuration selected.
Table 13: Dry Contact Relays
Relay Type Normal Maximum Ratings
Alarm SPST N.O. 5A at 30VDC
Accessory SPST N.O. 5A at 30VDC
Fault SPST N.O. 5A at 30VDC
Alarm and accessory relays are normally de-energized open. When in the
alarm or warning status the appropriate relay is closed.
Fault relay is normally energized closed, the contact will be closed, and
when it is in fault situation, the relay is opened.