Inside junction box of the ET / MT-208:


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The X2 interface of the Readerbox
must be connected to interface X3 (COM2) of the ET/MT-208.
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RS-422 connection detail:
Device name
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ReaderBox-...-DC(AC)*1
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Connection
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Data circuit
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Cable
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5 x 1 mm²
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-
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Designation
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Open cable end X2
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Terminal X3 (COM2 - RS-422)
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View
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delivery state:
all wires black and numbered.
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Assignments / connections
(wire / pin)
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Wire
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Signal
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Pin
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Signal
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3
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RxD-b
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1
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TxD-b
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4
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RxD-a
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2
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TxD-a
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1
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TxD-b
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3
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RxD-b
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2
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TxD-a
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4
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RxD-a
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5
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Green / Yellow
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Not used
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-
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-
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*1)
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DC = ReaderBox with 24 VDC connection.
AC = ReaderBox with 100 to 240 VAC connection.
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The blue wires of the X2 data circuit of the ReaderBox is not needed and must be cut off at the cable end !
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The supply voltage can not be looped through the ET-208 / MT-208. Therefore you must split it in Ex-e terminal box and lead it to the devices separately.
24 VDC an Readerbox

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The output circuit cable is about 1.1 metres long and typically 3 x 1 mm² !
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Wire
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Signal name
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Definition
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1
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+ VDC
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Supply voltage 24VDC+
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2
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GND
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Supply voltage ground 0VDC
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Green/yellow
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Equipotential bonding
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100 bis 240 VAC Netzspannung an Readerbox

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The output circuit cable is about 1.1 metres long and typically 3 x 1 mm² !
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Wire
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Signal name
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Definition
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1
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L1
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Supply voltage phase
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2
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N
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Supply voltage neutral
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PE
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Earth
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Protective earth
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Re. *1),
Make sure you have the AC version
before connecting the ReaderBox to the mains !
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