RM7890, RM7895 100 Vac
Fig. 6. Wiring the RM7890 Relay Module.
Table 7. Recommended Wire Sizes and Part Numbers.
Application
Recommended Wire Size
Recommended Part Numbers
Line voltage terminals
14, 16 or 18 AWG copper conductor,
600 volt insulation, moisture-resistant
wiring.
TTW60C, THW75C, THHN90C.
KDM
22 AWG two-wire twisted pair with
ground, or five-wire communications
wire.
Belden
®
8723 shielded cable (two-wire) or
Belden
®
8771 shielded cable (five-wire) or equivalent.
Data ControlBus™ Module
22 AWG two-wire twisted pair with
ground or five-wire communications
wire.
Belden
®
8723 shielded cable (two-wire) or
Belden
®
8771 shielded cable (five-wire) or equivalent.
Remote Reset Module
22 AWG two-wire twisted pair,
insulated for low voltage.
—
Modbus™ Module
22 AWG two-wire twisted pair with
ground.
Belden
®
8723 shielded cable or equivalent.
13 Vdc full-wave rectified
transformer power input.
18 AWG wire insulated for voltages and
temperatures for given application.
TTW60C, THW75C, THHN90C.
The KDM, and (for remote mounting or communications) Data
ControlBus™ Module or Modbus™ Module must be wired in a
daisy chain configuration,
(1(a)-1(a), 2(b)-2(b), 3(c)-3(c)). The order of interconnection
of all the devices listed above is not important. Be aware that
modules on the closest and farthest end of the daisy chain
configuration string require a 120 ohm (1/4 watt minimum)
resistor termination across terminals 1 and 2 of the electrical
connectors for connections longer than 100 feet (30 meters).
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