User Manual
- 6 - 
Wiring the Power Inputs 
The two left-most contacts of the 3-contact terminal block connector on 
IMC’s top panel are used for IMC’s DC or AC inputs. Top and front views of 
one of the terminal block connectors are shown here. 
Top View 
Front View 
STEP 1:
 Insert the negative/positive DC wires 
into the V
-/V+ terminals. 
STEP 2:
To keep the DC wires from pulling loose, 
use a small flat
-
blade screwdriver to tighten the 
wire
-clamp screws on the front of the terminal 
block connector.
STEP 3:
 Insert the plastic terminal block 
connector prongs into the terminal block 
receptor, which 
is located on IMC’s top panel. 
Communication Connections 
IMC-21 has one 10/100BaseT(X) Ethernet port. 
RJ45 Ethernet Port Connection 
The 10/100BaseT(X) port located on IMC’s front panel are used to 
connect to Ethernet-enabled devices. 
Below we show pinouts for both MDI (NIC-type) and MDI-X 
(HUB/Switch-type) ports, and also show cable wiring diagrams for 
straight-through and cross-over Ethernet cables. 
MDI Port Pinouts 
MDI-X Port Pinouts 
8-pin RJ45 
Pin 
Signal 
1 
Tx+ 
2 
Tx- 
3 
Rx+ 
6 
Rx- 
Pin 
Signal 
1 
Rx+ 
2 
Rx- 
3 
Tx+ 
6 
Tx- 
RJ45 (8-pin) to RJ45 (8-pin) Straight-Through Cable 
Wiring 










