Allen Bradley 1747-DCM Direct Communication Module

FAQ

Q1: What is the function of the 1747‑DCM module?
It is a Direct Communication Module that connects an Allen‑Bradley SLC 500 controller to a Remote I/O (RIO) network for distributed processing and communication.

Q2: Which protocol does the 1747‑DCM use?
It uses Remote I/O (RIO) communication protocol.

Q3: What transmission rates are supported?
Supported transmission rates include 57.6 Kbaud, 115.2 Kbaud, and 230.4 Kbaud depending on cable length and node configuration.

Q4: What cable is required for RIO communication?
Belden 9463 or an equivalent RIO cable is used for network wiring.

Q5: How much current does the module draw from the SLC backplane?
The module draws approximately 360 mA at 5 V DC.

Q6: What LEDs does the module have and what do they indicate?
It has FAULT and COMM LEDs that show communication status and internal fault indications.

Q7: What are the physical size and weight of the 1747‑DCM?
Dimensions are about 5.72 × 1.37 × 5.15 in (145 × 35 × 131 mm) and weight is around 0.17 kg.

Q8: Is the 1747‑DCM still in active production?
No — it is a legacy/discontinued SLC 500 communication module.

1747-DCM Allen Bradley

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