Electro-Voice 1252 - Manual (Page 115)

Electro Industries/GaugeTech Doc # E107706 V1.25 9-3
9.2: Installing Nexus External I/O Modules
Q 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.
Figure 9.2: Nexus Meter Connected to I/O Module
RT
RT *
(For runs typically longer than 500 feet)
Male Side Port
on Nexus I/O
Module
Nexus
1250/1252
Port 3 or 4
LED’s
Q * 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.