Topic: DMD0229
Discrete I/O Modules
Discrete I/O Module Mapping
The default configuration for all of the Do-more CPUs is to automatically map the I/O points for the on-board Discrete inputs and outputs and all of the discrete I/O modules, beginning in the slot adjacent to the CPU, and proceeding from left to right across the base, allocating discrete input and output memory as each module requires. I/O modules under the control of the Ethernet I/O Master will be addressed in the same manner (left to right across the base) in the order the I/O Slaves appear in the I/O Configuration.
By default, discrete inputs are mapped into X memory, starting at X0. Each location in X memory contains 1 bit, which can be ON or OFF. By default, discrete outputs are mapped into Y memory, starting at Y0. Each location in Y memory contains 1 bit, which can be ON or OFF. The default mapping for any discrete I/O module can be changed through the I/O Mappings page in the System Configuration utility.
Both discrete inputs and outputs are allocated on Byte (8-bit) boundaries. See the Additional Notes column for I/O mapping details on modules that have I/O counts that are not on Byte boundaries.
Supported BRX Discrete Modules
Supported DL205 Discrete Modules
Discrete Input Modules |
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Part Number |
Description |
Module ID |
Input Points |
Additional Notes |
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254 (0xFE) |
8 |
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DC Input |
191 (0xBF) |
16 |
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DC Input |
126 (0x7E) |
32 |
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DC Input |
126 (0x7E) |
32 |
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AC Input |
254 (0xFE) |
8 |
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AC Input |
254 (0xFE) |
8 |
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AC Input |
191 (0xBF) |
16 |
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254 (0xFE) |
8 |
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Discrete Output Modules |
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Part Number |
Description |
Module ID |
Output Points |
Additional Notes |
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223 (0xDF) |
8 |
Yn+0 - Yn+3 used, Yn+4 - Yn+7 unused |
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DC Output |
253 (0xFD) |
8 |
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DC Output |
253 (0xFD) |
8 |
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DC Output |
127 (0x7F) |
16 |
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DC Output |
127 (0x7F) |
16 |
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DC Output |
249 (0xF9) |
32 |
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DC Output |
249 (0xF9) |
32 |
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AC Output |
253 (0xFD) |
8 |
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AC Output |
253 (0xFD) |
8 |
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AC Output |
127 (0x7F) |
16 |
Yn+0 - Yn+5 used, Yn+6 & Yn+7 unused Yn+8 - Yn+13 used, Yn+14 and Yn+15 unused |
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Relay Output (Isolated) |
253 (0xDF) |
8 |
Yn+0 - Yn+3 used, Yn+4 - Yn+7 unused |
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Relay Output |
253 (0xFD) |
8 |
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Relay Output (Isolated) |
253 (0xFD) |
8 |
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Relay Output |
127 (0x7F) |
16 |
Yn+0 - Yn+5 used, Yn+6 & Yn+7 unused Yn+8 - Yn+13 used, Yn+14 and Yn+15 unused |
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Combination Discrete Input / Output Modules |
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Part Number |
Description |
Module ID |
Input / Output |
Additional Notes |
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247 (0xF7) |
8 / 8 |
Xn+0 - Xn+3 used, Xn+4 - Xn+7 unused Yn+0 - Yn+3 used, Yn+4 - Yn+7 unused |
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231 (0xE7) |
16 / 16 |
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DC Output (w/ Fault Protection) |
231 (0xE7) |
16 / 16 |
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Supported Terminator I/O Discrete Modules
Discrete Input Modules |
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Part Number |
Description |
Module ID |
Input Points |
Additional Notes |
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T1K-08ND3 |
DC Input |
4354 (0x1102) |
8 |
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T1K-16ND3 |
DC Input |
4355 (0x1103) |
16 |
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T1K-08NA-1 |
AC Input |
4482 (0x1182) |
8 |
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T1K-16NA-1 |
AC Input |
4483 (0x1183) |
16 |
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Discrete Output Modules |
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Part Number |
Description |
Module ID |
Output Points |
Additional Notes |
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T1K-08TD1 |
DC Output |
4675 (0x1243) |
8 |
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T1K-08TD2-1 |
DC Output |
4675 (0x1243) |
8 |
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T1K-08TDS |
DC Output (Isolated) |
12930 (0x3282) |
8 |
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T1K-16TD1 |
DC Output |
4611 (0x1203) |
16 |
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T1K-16TD2-1 |
DC Output |
4611 (0x1203) |
16 |
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T1K-08TA |
AC Output |
4642 (0x1222) |
8 |
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T1K-08TAS |
AC Output (Isolated) |
4770 (0x12A2) |
8 |
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T1K-16TA |
AC Output |
4643 (0x1223) |
16 |
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T1K-08TR |
Relay Output |
4674 (0x1242) |
8 |
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T1K-08TRS |
Relay Output (Isolated) |
4674 (0x1242) |
8 |
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T1F-16TR |
Relay Output |
4675 (0x1243) |
16 |
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See Also:
Discrete I/O Modules