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Doc # E107706 V1.25 3-6
3.4:
Mounting
the
Nexus
External
I/O
Modules
Q
Secure the mounting brackets to the I/O using the screws supplied (#440 pan-head screws). Next,
secure the brackets to a flat surface using a #8 screw with a lock washer.
Q
If multiple I/O modules are connected together, as shown in Figure 3.4, secure a mounting bracket to
both ends of the group. One Nexus will supply power for up to four I/O modules. To connect more
than four I/O modules, use an additional power supply, such as the EIG PSIO. Connect multiple I/O
modules using the RS-485 side ports.
Q
Six feet of RS-485 cable harness is supplied. The cable harness brings power to the display from the
Nexus Meter, which supplies 15–20V DC at 50–200mA. See Chapter 5 for power supply and com-
munication details.
Figure 3.7: Nexus I/O Modules Mounting Diagram, Overhead View
Mounting Bracket
Mounting Bracket
Figure 3.8: Nexus I/O Module Communication Ports
Female RS-485 Side Port
I/O Port
Mounting Brackets (MBIO)
0.015” (.38mm)
1.125” (2.85cm)
2 x .625” (1.58cm)
4.215” (10.70cm)
Male RS-485 Side Port