GE Fanuc IC695ALG728 RX3i Analog Output Module

Product Overview

The GE Fanuc IC695ALG728 is an 8-Channel, Non-Isolated Analog Output Module for the PACSystems RX3i platform. It delivers precise voltage and current signals to field devices and features integrated HART Protocol Version 5.0 communication, enabling direct digital interfacing with smart transmitters and valve positioners. Each of the eight channels is individually configurable via software—no jumpers required—making it ideal for process control, batch automation, and SCADA integration.

Key Features

• 8 Configurable Output Channels: Voltage or current, individually selectable per channel
• HART Protocol v5.0: Built-in dual HART modems (4 channels per modem) for smart device communication
• High Resolution: Up to 15.9 bits for voltage and current outputs
• Software-Configurable: No physical jumpers; all settings managed through programming software
• Advanced Diagnostics: Channel-level alarms, fault reporting, latching, and configurable clamp/bias limits
• Auto-Calibration: Maintains accuracy across the operating temperature range
• Hot-Swappable: Supports insertion and removal under power when used with RX3i Universal Backplane

Technical Specifications

• Manufacturer: GE Fanuc / Emerson Automation
• Series: PACSystems RX3i
• Part Number: IC695ALG728
• Product Type: Analog Output Module with HART
• Channels: 8 non-isolated, single-ended
• Voltage Output Ranges: 0 to +10 VDC, –10 to +10 VDC
• Current Output Ranges: 0–20 mA, 4–20 mA
• Resolution:
  • ±10 VDC: 15.9 bits
  • 0–10 VDC: 14.9 bits
  • 0–20 mA: 15.9 bits
  • 4–20 mA: 15.6 bits
• Calibrated Accuracy: ±0.15% full scale at 25°C; ±0.30% full scale at 60°C
• Analog Update Rate: 8 ms (all channels, without HART); 16 ms (all channels, with HART enabled)
• Output Settling Time:
  • Voltage: 2 ms (0–95%)
  • Current (no HART): 23 ms (0–95%)
  • Current (with HART): 70 ms (0–95%)
• Maximum Output Load: 850 Ω (current mode)
• Minimum Voltage Load: 2 kΩ
• Output Overvoltage Protection: –30 V for 60 s, +30 V for 1 hr (current outputs only)
• Isolation Voltage: 2550 VDC (field to backplane, 1 second)
• Data Format: Configurable as IEEE 32-bit floating point or 16-bit integer in 32-bit field
• HART Modems: 2 internal modems (4 channels multiplexed per modem)
• HART Scan Time (typical):
  • 1 HART channel per group: ~0.7 s
  • 2 HART channels per group: ~1.9 s
  • 3 HART channels per group: ~3.0 s
  • 4 HART channels per group: ~4.0 s
• Backplane Power: 380 mA max @ 3.3 VDC (with HART enabled)
• External Power Supply: 19.2–30 VDC (24 V nominal), 190–250 mA max
• Power Dissipation: 7.25 W max (at Vuser = 24 VDC)
• Operating Temperature: 0°C to 60°C
• Protection Rating: IP20
• Dimensions: ~127 × 64 × 46 mm (5.0 × 2.5 × 1.8 in)
• Weight: ~0.20 kg
• Commercial Status: Active

Related RX3i Analog Output Modules

• IC695ALG704 — 4-Channel Isolated Analog Output (no HART)
• IC695ALG708 — 8-Channel Non-Isolated Analog Output (no HART)
• IC695ALG728 — 8-Channel Non-Isolated Analog Output with HART ← This Item

Installation Guide

1. Power Down: Remove system power before installing or removing the module to prevent damage.
2. Slot Selection: Install the IC695ALG728 into any available slot of an RX3i Universal Backplane (local CPU rack or remote I/O rack).
3. External Power: Connect a regulated 24 VDC (19.2–30 VDC) external power supply to the module's power terminals. This supply is required for operation.
4. Terminal Block: Use the removable terminal block (IC695TBBxxx / IC695TBBOxxx) for field wiring. Ensure the terminal block is fully seated; the module includes a detector switch that disables outputs if the block is missing.
5. Field Wiring:
   • Voltage outputs: Connect load between VOUT and common (COM).
   • Current outputs: Connect load between IOUT and common (COM).
   • HART channels: Must be configured in 4–20 mA range. Connect HART communicator across the loop resistor or at the field device.
6. Grounding: Follow RX3i system grounding guidelines (GFK-2314) to minimize noise and ensure safety.
7. Configuration: Use PAC Machine Edition (PME) or Proficy ME to configure each channel's range, data format, alarms, and HART settings.
8. LED Indicators: Monitor the module OK LED and individual channel status LEDs for fault diagnosis.

Selection Tips

• HART Requirement: Choose IC695ALG728 only if you need HART communication with smart field devices. For standard analog outputs without HART, the IC695ALG708 (8-channel) or IC695ALG704 (4-channel isolated) may be more cost-effective.
• Isolation: The IC695ALG728 provides non-isolated channels. If channel-to-channel or channel-to-backplane isolation is required, consider the IC695ALG704 instead.
• External Power: Ensure your panel has a dedicated 24 VDC supply available. The module cannot operate from backplane power alone.
• Load Impedance: Verify that your field devices present ≤ 850 Ω load in current mode. High-impedance voltage loads (>2 kΩ) are required for voltage outputs.
• Temperature: For installations where ambient temperature approaches 60°C, account for the ±0.30% FS accuracy degradation in your control loop design.

Frequently Asked Questions (FAQ)

Q1: Does the IC695ALG728 require an external power supply?
A: Yes. The module requires an external 19.2–30 VDC supply (24 V nominal, up to 250 mA) in addition to backplane power. It cannot operate from backplane power alone.

Q2: Can all eight channels use HART simultaneously?
A: Yes. The module has two internal HART modems, each serving four channels. All eight channels can be configured for 4–20 mA with HART communication active.

Q3: What is the difference between IC695ALG728 and IC695ALG708?
A: The IC695ALG708 is an 8-channel non-isolated analog output module without HART. The IC695ALG728 adds HART Protocol Version 5.0 with dual internal modems. Both share the same voltage/current ranges and channel count.

Q4: Can I mix voltage and current outputs on the same module?
A: Yes. Each channel is independently configurable for voltage (±10V or 0–10V) or current (0–20mA or 4–20mA) via software configuration.

Q5: What happens if the terminal block is removed while the system is running?
A: The module includes a terminal block detector switch. If the block is removed, the module disables all outputs to prevent uncontrolled signals to the field.

Q6: What is the warranty period?
A: We provide a standard 12-month warranty for all new and original GE Fanuc / Emerson products.