CPU20L Wiring

This topic covers the wiring of the CPU20L Module (RMC200). See Wiring Guidelines for general wiring information.

Ethernet

The 2 RJ45 Ethernet ports act as a 3-way switch with the RMC on one port with a single IP address. Accepts an RJ45 Ethernet cable.

USB

Accepts a USB Type B plug. USB connector shielding is grounded with case ground.

Power Pin-out

Pin	Label	Description
1	+24V	24 VDC power
2	24 Cmn	24 VDC return
3	Cased	Shield connection

Input Power

Power

Input Power

28 W max (1.2A at 24Vdc)

Input Voltage

Recommended 24Vdc ± 15% (20.4 – 27.6 V), 30 V max.

Overvoltage shutdown at 36 V.

Power Fusing

Fusing is not required for protecting the CPU20L power input. The CPU20L has an internal, non-user-accessible, fast-acting 5 A built-in fuse. If a fuse is installed, it should be a fast-acting fuse less than 5 A, such as 4 A. Fusing may also optionally be installed to protect the wiring.

Power Wiring Diagram

The Case pin is electrically connected to the RMC200 case.

Discrete I/O Pin-out

Pin	Label	Description
1	DIn0+	General-purpose input 0, 12 -24 Vdc
2	DIn0-	General-purpose input 0, 12 -24 Vdc
3	DIn1+	General-purpose input 1, 12 -24 Vdc
4	DIn1-	General-purpose input 1, 12 -24 Vdc
5	DOut0+	General-purpose output 0, Solid State Relay up to 30 Vdc or peak AC
6	DOut0-
7	DOut1+	General-purpose output 1, Solid State Relay up to 30 Vdc or peak AC
8	DOut1-

Discrete Inputs

The CPU20L discrete inputs are compatible with signal levels ranging from 12 to 24VDC. The discrete inputs draw 3mA maximum. Each input is individually isolated.

Used with a sourcing output

Used with a sinking output

Discrete Outputs

The CPU20L discrete outputs are solid state relays. The off state is high impedance, the on state is low impedance (8Ω max, 5Ω typical). Each output is individually isolated. Outputs can be wired in either a high-side or low-side configuration. Outputs can be wired in either a high-side or low-side configuration. Max current 75 mA. Max voltage 30 V.