Wiring A Relay Contact; Wiring The Power Inputs; Figure 2.10 Grounding Connection; Figure 2.11 Terminal Receptor: Relay Contact - Advantech EKI-1222R-CE User Manual

Electromagnetic Interference (EMI) affects the transmission performance of a device.
By properly grounding the device to earth ground through a drain wire, you can set
up the best possible noise immunity and emissions.
Drain Wire with Lug
By connecting the ground terminal by drain wire to earth ground the modbus router
and chassis can be ground.
Note! Before applying power to the grounded modbus router, it is advisable to
use a volt meter to ensure there is no voltage difference between the
power supply's negative output terminal and the grounding point on the
modbus router.
2.6.4

Wiring a Relay Contact

The following section details the wiring of the relay output. The terminal block on the
EKI-122xR-CE Series is wired and then installed onto the terminal receptor located
on the EKI-122xR-CE Series.
The terminal receptor includes a total of six pins: two for PWR1, two for PWR2 and
two for a fault circuit.
2.6.5

Wiring the Power Inputs

Caution! Do not disconnect modules or cabling unless the power is first switched
off.
The device only supports the voltage outlined in the type plate. Do not
use any other power components except those specifically designated
for the modbus router device.
Warning! Power down and disconnect the power cord before servicing or wiring
the modbus router.

Figure 2.10 Grounding Connection

PWR2 1A@24V
V2- V2+
P-Fail

Figure 2.11 Terminal Receptor: Relay Contact

20
Connection to
Grounding Point
PWR1 DC12-48V
V1- V1+
EKI-122xR-CE Series User Manual