Product Name: Remote I/O Communications Module
Brand Name: Allen Bradley
Model Number:1203-GD1
Country of Origin:USA
Warranty: 12 Months
Whatsapp：+86 18159889985
Email：[email protected]
Brand Name: |
Allen Bradley |
Model Number: |
1203-GD1 |
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 |
1203-GD1 |
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Input Power |
85264V AC, 35 mA |
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Operating Temp |
0 to +50 °C |
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RIO Baud Rates |
57.6K, 115.2K, 230.4K |
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Rack Sizes |
1/4, 1/2, 3/4, full |
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Enclosure |
NEMA Type 1 (IP30) |
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Mounting |
35 mm DIN rail |
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Dimensions (HxWxD) |
76 x 45 x 123 mm |
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Approvals |
UL, cUL, CE |
The 1203‑GD1, 1203‑GK1, and 1336‑GM1 act as a gateway between a SCANport product (e.g., 1336 PLUS, 1305, 1394, SMC Dialog Plus) and a Remote I/O network. They are configured via DIP switches (SW1, SW2, SW3) for rack address, starting group, baud rate, fault action, and datalink enable. The 1203‑GD1 is powered by 85‑264V AC, while the 1203‑GK1 uses 24V DC; both mount on DIN rail. The 1336‑GM1 is a board that fits inside selected drives. All three support up to eight words of I/O (Logic Command/Status, Reference/Feedback, and up to four datalinks A‑D). Datalinks allow continuous parameter access without block transfers. The modules also support block transfer messages for reading/writing parameter values, full parameter information, fault queues, and NVS save/recall functions. Firmware versions from 1.xx to 4.xx are covered.
Connect 1336 PLUS, 1336 FORCE, 1336 IMPACT, or 1305 drives to a PLC‑5 or SLC 500 Remote I/O network
Integrate SMC Dialog Plus soft starters or SMP‑3 motor protectors into RIO systems
Replace discrete wiring with digital control for start/stop, speed reference, and status monitoring
Use datalinks to change drive parameters (e.g., acceleration, current limit) on‑the‑fly without messaging
Retrofit legacy RIO‑based plants with modern SCANport drives while keeping the existing controller
DIP switch configurable – no software needed for basic setup (rack, group, baud rate, fault action)
Datalink support – up to four datalinks (A, B, C, D) each providing two 16‑bit words I/O; last datalink can be truncated to save rack space
Fault configurable outputs – selectable fault action (fault, zero data, or hold last state) on communication loss or controller program/reset
Built‑in termination resistor option – internal jumper on 1336-GM1 (150Ω) or external 82Ω/150Ω for 1203-GD1/GK1
LED diagnostics – five LEDs (Fault, SCANport STS, Health, Rem I/O ACT, Rem I/O STS) for rapid troubleshooting
Wide SCANport compatibility – works with most Allen‑Bradley drives and power products
Discrete I/O transfer – moves Logic Command/Status and Reference/Feedback words between controller image table and drive
Datalink parameter access – reads/writes drive parameters without block transfer messages; values stored in volatile memory (no EEPROM wear)
Block transfer messaging – supports parameter read/write, full parameter info, scattered reads/writes, fault queue access, and NVS save/recall/initialize
Fault handling – detects communication loss or controller mode change and responds per DIP switch settings (fault drive, zero outputs, or hold last)
RIO status reporting – provides a status word (first input word) with bits for BT ready, BT write in progress, BT read available, error, etc.
Q1: What is the difference between the 1203-GD1, 1203-GK1, and 1336-GM1?
A: The 1203-GD1 uses 85‑264V AC power; the 1203-GK1 uses 24V DC. Both are external DIN‑rail modules. The 1336-GM1 is an open‑style board that mounts directly inside a compatible drive (e.g., 1336 PLUS) and draws power from the drive.
Q2: Can I use datalinks and block transfers at the same time?
A: Yes. Datalinks provide continuous I/O‑based parameter access without writing to EEPROM. Block transfers are used for less frequent operations (e.g., reading fault history, changing configuration parameters). Both can coexist, but block transfer must be enabled via SW3.1.
Q3: How do I set the module to hold the last state instead of faulting on communication loss?
A: On SW2, set SW2.5 = 0 (No Fault on comm loss) and SW2.4 = 0 (Hold last state). Then SW2.6 (fault on reset/program/test) can also be set accordingly. *Note: firmware v3.04 has an anomaly – if SW2.5 = OFF, the drive holds last state regardless of SW2.4; contact support if zero data is required.*
Q4: What is the “truncate last datalink” feature (SW3.8)?
A: Normally each datalink uses two input words and two output words. If you enable truncate (SW3.8 = ON), the second word of the last enabled datalink is dropped. This reduces rack size (e.g., enabling datalinks A & B normally uses 4 words; with truncate it uses 3 words). Available on firmware 1.02 or later.
Q5: Why does my drive generate a serial fault when the module is disconnected, even for block‑transfer‑only applications?
A: This is a known behavior for firmware 4.01 when only block transfer is enabled (SW3.1 ON, SW3.3 OFF). The recommended workaround is to enable reference/feedback (SW3.3 ON) as well – this prevents the power‑up fault and still fits within 1/4 rack. The drive will then serial fault if the module loses power, which can be handled in the ladder logic.
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