Measurement Computing 6224 - Manual (Page 12)

1-6 General Information 6224 User’s Manual
Quarter-Bridge Completion Accessories (CN-269 & CN-270)
The CN-269 and CN-270 are Quarter-Bridge Completion kits, with each kit
consisting of four components. A single component (each member of its
respective four-pack) can be used to add a Quarter-Bridge completion resistor
to a channel on the 6224.
The CN-269 components each house a 120 ohm resistor.
The CN-270 components each house a 350 ohm resistor.
You will need an RJ50 M/M cable to use any of the Quarter-Bridge
components with an 6224.
Measurement Computing offers a pack of four
RJ50 M/M, 1 meter (3.28ft) cables (see upcoming RJ50 Cables section).
As indicated in the right-hand figure below, CN-269 and CN-270 components each have two holes that can be used to loop a
plastic tie-strap through, as a means of adding strain relief for the wire connections to the screw terminals.
If you want to mount a component, use a M4x20 screw (or similar hardware) that can fit into the 8.89 mm (0.350 in.) outer
clearance/4.57 mm (0.180 in.) inner clearance hole. See figure.
Specifications
(typical for the range -40 to 70 °C)
Weight ................................................ 32 g (1.1oz) per single component
Operating temperature .................... –40 to 70 °C
Resistor values:
CN-269 .......................................... 120 Ω
CN-270 .......................................... 350 Ω
Resistance drift:
CN-269 .......................................... 0.012 Ω/°C
CN-270........................................... 0.035 Ω/°C
Resistor tolerance (at 25 °C) ............... 0.1% max
Resistor power .....................................0.25 W max
Do not connect an RJ45 plug to an RJ50 jack. Using RJ45 plugs can cause
permanent damage to RJ50 pins 1 and 10, thus disabling shunt calibration.