Electro-Voice 1252 Installing Nexus External I/O Modules, Nexus Meter Connected to I/O Module

9.2: Installing Nexus External I/O Modules

I/O modules must use the Nexus 1250/1252 Meter’s Port 3 or 4. Six feet of RS-485 cable harness is supplied. Attach one end of the cable to the port (connectors may not be supplied); insert the other end into the communication pins of the module’s Male RS-485 Side Port. Follow steps below and see Figure 9.2 below. See section 9.3 for details on using multiple I/O modules.

LED’s

Male Side Port on Nexus I/O Module

RT

RT *

(For runs typically longer than 500 feet)

Nexus 1250/1252

Port 3 or 4

Figure 9.2: Nexus Meter Connected to I/O Module

*NOTE: Termination Resistors are only needed with runs typically more than 500 feet. The meter has some level of termination internally and usually resistors are not needed.

Electro Industries/GaugeTech Doc # E107706 V1.25 9-3