Rockwell Automation 1756-L55M12, Selection Manual, Page: 16 / 88

14
1756-SG001G-EN-P — March 2004
1756 Removable
Terminal Blocks Removable terminal blocks (RTBs) provide a flexible interconnection between your
plant wiring and 1756 I/O modules. The RTB plugs into the front of the I/O module.
The type of module determines which RTB you need. You choose screw-clamp or
spring-clamp RTBs.
RTBs are not shipped with I/O modules. You must order them separately. The
standard housing on the front of the wiring arm is not deep enough for 14 AWG
wiring. If you plan to use 14 AWG wiring, also order the extended housing.
1492 Wiring
Systems
As an alternative to buying RTBs and connecting the wires yourself, you can buy a
wiring system of:
y
interface modules (IFMs) that mount on DIN rails provide the output terminal
blocks for the I/O module. Use the IFMs with the pre-wired cables that match the
I/O module to the interface module.
y
I/O-module-ready cables. One end of the cable assembly is an RTB that plugs into
the front of the I/O module. The other end has individually color-coded conductors
that connect to a standard terminal block.
Cat. No. Description Weight
1756-TBNH screw-clamp with 20-pin connection 0.1 kg (0.3 lb)
1756-TBSH spring-clamp with 20-pin connection 0.1 kg (0.3 lb)
1756-TBCH screw-clamp with 36-pin connection 0.1 kg (0.3 lb)
1756-TBS6H spring-clamp with 36-pin connection 0.1 kg (0.3 lb)
1756-TBE extended housing; required for additional wiring space if using 14 AWG wiring 0.05 kg (0.1 lb)