Allen Bradley 1769-IR6 Resistance Input Module
The 1769-IR6 module receives and stores digitally converted analog data from RTDs or other resistance inputs, such as potentiometers. The module supports connections from any combination of up to 6 RTDs or other resistance inputs, their associated temperature ranges, and the analog input signal ranges that each channel supports. Each of the 6 input channels is individually configurable for a specific input device and provides open- or short-circuit and over- or under-range indication.
Hardware Components
| Item |
Description |
| 1 |
Bus lever (with locking function) |
| 2a |
Upper panel mounting tab |
| 2b |
Lower panel mounting tab |
| 3 |
Module status LED |
| 4 |
Module door with terminal identification label |
| 5a |
Movable bus connector with female pins |
| 5b |
Stationary bus connector with male pins |
| 6 |
Nameplate label |
| 7a |
Upper tongue-and-groove slots |
| 7b |
Lower tongue-and-groove slots |
| 8a |
Upper DIN rail latch |
| 8b |
Lower DIN rail latch |
| 9 |
Write-on label (user ID tag) |
| 10 |
Removable Terminal Block (RTB) with finger-safe cover |
| 10a |
RTB upper retaining screw |
| 10b |
RTB lower retaining screw |
RTD Configuration Options
For a 3-wire configuration, the module can compensate for a maximum cable length associated with an overall cable impedance of 25 ohms.
- 2-wire RTD, which is composed of an RTD EXC (excitation) lead wire and a RTN (return) lead wire
- 3-wire RTD, which is composed of a Sense and 2 RTD lead wires (RTD EXC and RTN)
- 4-wire RTD, which is composed of a Sense and 2 RTD lead wires (RTD EXC and RTN). The second sense wire of a 4-wire RTD is left open.
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