EX213, 221, 230 & 233
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3.4 Relays
The relays used on the EX213 card are of the RY2 8 Amp low profile range.
These have a silver/cadmium oxide contact and are rated at 8 Amps @250 Vac or 30 Vdc
The coil on each relay is a nominal 2350 Ohms.
Normal operating temperature: –20 to 60 deg C.
The relays are sealed to IP67 rating.
3.5 Connections
Connections from the PC to the EX213 come via your chosen Digital I/O Counter Timer board, via a
78 way cable to the EX233 Distribution Panel. The EX233 splits the 72 lines of Digital I/O Counter
Timer signals into three groups, Groups X, Y and Z. Each group contains either three 8-bit digital IO
ports or six CLK/GATE counter timer inputs and outputs. Each group has its own 37-way D connector
(male) and a row of 26 WAGO connectors, each for an individual line. Connection to the EX213
should be made using a 37-way cable (Order code 9101 4890) from the EX233 to SK4 on the EX213.
Each output has either a direct ‘logic’ connection (SK2), or a two row block of WAGO connectors (SK7
and SK8) if the board is configured for relay output. There is also a ‘shared bus’ feature, which allows
the user to make either a signal or a power connection to SK3 on the EX233 and it will be brought out
on SK5 of the EX213. Both of the EX213s sister boards the EX221 and EX230 also have this feature,
see Section 7.3.2 for further details.
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