Product Name: Communications Module
Brand Name: Allen Bradley
Model Number:1203-CN1
Country of Origin:USA
Warranty: 12 Months
Whatsapp：+86 18159889985
Email：[email protected]
Brand Name: |
Allen Bradley |
Model Number: |
1203-CN1 |
Country of Origin: |
USA |
Packaging Details: |
Original new Factory Sealed |
Delivery Time: |
Delivery time in stock |
Payment Terms: |
T/T |
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Sales Manager: |
Stella |
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Send an email: |
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Contact in Whatsapp: |
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Parameter |
Value |
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Catalog Number |
1203-CN1 |
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Firmware Version |
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Dimensions |
99.5 × 68.4 × 90.0 mm (3.92 × 2.69 × 3.54 in) |
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Weight |
0.52 lb (236.7 g) |
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Operating Temperature |
0 to +55 °C (+32 to +131 °F) |
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Storage Temperature |
-40 to +85 °C (-40 to +185 °F) |
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Relative Humidity (Operating) |
5-80% non-condensing |
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Power Supply |
+24V DC (±20% / +30%), 250 mA max |
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ControlNet Media |
Coaxial, 5 Mbps, redundant or non-redundant |
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SCANport Interface |
8-pin circular mini-DIN |
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Serial Port |
RS-232 (DF1 protocol) for configuration & firmware upgrade |
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ControlNet Node Address |
0-99 (set by push buttons before power-up) |
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I/O Size (scheduled) |
Configurable: 2, 4, 6, 8, or 10 words |
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Maximum Field Wiring (Serial) |
305 m (1000 ft) |
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DIN Rail Standard |
35 × 7.5 mm (EN 50022) |
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Approvals |
UL 508, cUL, CE (EMC & Low Voltage Directives) |
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ESD Susceptibility |
6 kV contact, 8 kV open air (IEC 1000-4-2) |
The 1203‑CN1 ControlNet Communications Module acts as a translator between a ControlNet network and a single SCANport product such as a 1305 AC Micro Drive, 1336 PLUS, 1336 FORCE, 1336 IMPACT, 1394 Motion System, SMC Dialog Plus, or SMP‑3 Smart Motor Protector. When installed, the 1203‑CN1 makes the SCANport device appear as a native ControlNet node, allowing a PLC‑5 or other controller to exchange I/O and messages over the network.
The module features two ControlNet coaxial connections (Channel A and B) for redundant media support, a SCANport port, an RS‑232 serial port, and a set of bi‑color LEDs for status indication. The 1203‑CN1 is powered by an external +24V DC supply and mounts on standard 35 mm DIN rail. It is fully flash‑upgradeable via its serial port, and its parameters can be configured using a VT100 terminal or PC running terminal emulation software (e.g., HyperTerminal). For ControlNet network configuration, Rockwell’s RSNetWorx software is required.
The 1203‑CN1 supports both scheduled (time‑critical) I/O data and unscheduled (explicit) messaging. Scheduled data includes logic command/status, reference/feedback, and up to four datalinks (A, B, C, D) – each datalink provides two 16‑bit words of input and output. Unscheduled messaging allows reading/writing of SCANport parameters, fault queue access, and other services via PCCC or emulated block transfers.
Key parameters of the 1203‑CN1 include node address (2), baud rate for the serial port (21), idle/comm fault actions (9,10), fault configurable values (11‑20), and enable bits for command/status (4) and datalinks (5‑8). The module’s DF1 protocol statistics and event queue can be viewed through the serial menu.
Drive integration: Connect Allen‑Bradley SCANport drives (1305, 1336 PLUS, 1336 FORCE, 1397, etc.) to a ControlNet network for centralized control and monitoring.
Soft starter & motor protector networking: Integrate SMC Dialog Plus or SMP‑3 devices into a ControlNet system.
Legacy system modernization: Retrofit existing SCANport products into new or upgraded ControlNet architectures without replacing drives.
Distributed I/O over ControlNet: Use datalinks to continuously exchange parameter values (e.g., speed reference, torque, current) between a PLC and the drive.
Redundant media applications: Leverage the module’s dual coax connections for fault‑tolerant networks in critical processes.
Deterministic real‑time I/O – Scheduled communication at 5 Mbps with repeatable update times.
Redundant media ready – Two ControlNet ports (Channel A & B) for fault‑tolerant network topologies.
No special tools – Simple finger‑tight SCANport cable connection; node address set via push buttons.
Flexible mounting – Standard 35 mm DIN rail with integrated grounding (ohmmeter‑verifiable).
Onboard diagnostics – Four LEDs (Module, SCANport, Channel A, Channel B) provide instant status.
Datalink support – Enables up to 8 additional words of I/O (4 in / 4 out) for continuous parameter access.
Fault‑configurable outputs – Pre‑set safe values (zero, hold last, or user‑defined) if controller goes to program mode or network fails.
Flash upgradeable – Firmware updates via serial port (Xmodem) without removing the module.
Event queue logging – Stores up to 32 events for troubleshooting network or SCANport issues.
Wide SCANport compatibility – Works with any SCANport product, regardless of the number of peripheral ports.
Protocol conversion – Translates ControlNet explicit and I/O messages to SCANport protocol and vice versa.
I/O data mapping – Moves logic command/status, reference/feedback, and up to four datalinks between the PLC’s I/O image table and the drive.
Parameter access – Allows reading/writing of SCANport product parameters via PCCC messages (typed read/write) or emulated block transfers (scattered reads/writes, full parameter info).
Fault & warning queue management – Retrieves fault/warning text, codes, and timestamps from the drive.
Idle / comm loss handling – On controller program mode or network failure, the module can fault the drive, zero outputs, hold last values, or apply fault‑configurable presets.
Diagnostics reporting – Provides DF1 protocol statistics, event queue, and live I/O data view through the serial interface.
Flash firmware update – Upgrades module operating code via RS‑232 using Xmodem protocol.
Q1: Can the 1203‑CN1 be used with any SCANport product?
A: Yes. The 1203‑CN1 works with any device that has a SCANport communication port, including 1305, 1336 PLUS, 1336 FORCE, 1336 IMPACT, 1394, 1397, 1557, 2364 RGU, SMC Dialog Plus, and SMP‑3. However, the number of supported I/O words and datalinks depends on the specific product’s firmware.
Q2: How do I set the ControlNet node address for the 1203‑CN1?
A: Use the two small push buttons (+ and –) on the front of the module before applying power. The address must be unique on the network. After power‑up, the node address is locked; to change it, you must cycle power or reset the module (Parameter 22).
Q3: What is the difference between scheduled I/O and unscheduled messaging?
A: Scheduled I/O (logic command/status, reference, datalinks) is updated deterministically at the Requested Packet Interval (RPI) – typically 5‑100 ms. Unscheduled messaging (parameter reads/writes, fault queue access, etc.) uses spare bandwidth and is non‑deterministic. Both coexist on the same ControlNet link.
Q4: Does the 1203‑CN1 support redundant ControlNet media?
A: Yes. The module has two coaxial connections labelled “Channel A” and “Channel B”. If you use two taps and configure the network for redundancy, the module will automatically switch to the active channel if one fails. For non‑redundant systems, connect only Channel A.
Q5: How can I check if the 1203‑CN1 is communicating properly?
A: Observe the LEDs:
Module LED solid green = normal operation.
SCANport LED solid green = I/O and messaging active.
ControlNet LEDs steady green = link established.
If any LED is red or flashing, use the serial port (HyperTerminal, 9600‑8‑N‑1) to view the event queue (menu option 3) and DF1 statistics (option 5) for detailed diagnostics.
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