Elcon HiD 2000 Series, User Instruction Manual

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5.11 HiD 2822/2824
Functional description
Repeats the status of a voltage free contact or IS proximity sensor in a Hazardous Area to a relay output(s) in a
Safe Area.
The line fault detection feature (primarily used with proximity sensor) de-energises the output relay, gives an LED
indication and is signalled by a separate fault output.
Model 2822 Model 2824
Application Guidelines
The unit supply the required power to field contact/sensor; no additional power supply is required. A “open” contact
status is equivalent to the status of an object “near” to the proximity sensor. When the yellow status LED is “lit”,
the output relays are energised. To get the desired input/output relationship configure the switch properly in
according to the configuration table. When a fault condition is present, and the LFD is enabled, the relays are
always in the de-energised status and the fault red segnalation LED is “lit”. On the dual channel unit, the two
output relays per channel are always driven in parallel.
To drive high inductive load provide an adequate transient voltage protection such as zener, tranzorb, or similar
component.
The unit is designed to operate in low frequency switching application due to the relay output.
To get a fault-detection capability when the input is a voltage free contact ( i.e. not a proximitor ), use the following
circuit located at the end of the line, near the field contact:
To prevent fault segnalation on spare channel/module is necessary to connect a 10 K
Ω
½ W resistor across the
input terminals 1-4, 2-5, 3-6 and/or 7-8.
The unit can be used with /HAT, /SAT, /SACON termination board for all channel. The /HAKE termination board
can be used only for model HiD 2822. The /SACWT, /SACWCON can be used only for model HiD 2822 using
single output channel (not duplicated).