Overview
Specification
| Specification Category | Parameter / Details |
|---|---|
| Model Number | 125720-01 |
| Module Type | 4-Channel Relay I/O Module |
| Compatible System | Bently Nevada 3500 Machinery Protection System |
| Relay Channels | 4 independent Form C (SPDT) relay outputs |
| Relay Contact Ratings | 2 A @ 30 VDC, 0.5 A @ 125 VAC, resistive load |
| Relay Type | Electromechanical, gold-plated contacts |
| Input Signals Supported | Discrete (dry contact), analog (0–10 V or 4–20 mA depending on configuration) |
| Output Signals | Relay switching for alarm, shutdown, or indication purposes |
| Isolation | 1500 VDC between relay contacts and logic circuitry |
| Response Time | <5 ms typical (energize/de-energize) |
| Power Supply Requirement | 24 VDC nominal (range 18–30 VDC) |
| Power Consumption | 3 W typical, 4 W maximum |
| LED Indicators | Channel status, module fault, power OK |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -55°C to +100°C |
| Humidity | 0–95% RH, non-condensing |
| Shock & Vibration | 15 g peak, 11 ms half-sine; random vibration 5–500 Hz, 1.5 mm displacement |
| Mounting Options | DIN rail or 3500 chassis rack mount |
| Dimensions | 160 mm (L) x 60 mm (W) x 25 mm (H) |
| Weight | 0.35 kg |
| Safety & Compliance | CE marked, UL recognized component, RoHS compliant |
| Environmental Protection | IP20 when installed in chassis |
| Diagnostics / Self-Test | Built-in module fault detection and channel monitoring |
| Connection Type | Screw terminal blocks for inputs/outputs, plug-in module interface |
| Typical Applications | Rotating machinery monitoring, process automation shutdown, alarm signaling, industrial relay control |
FAQ
A1: The 125720-01 module is fully compatible with Bently Nevada 3500 Machinery Protection Systems, including all standard 3500 racks.Q2: How many relay channels does this module provide?
A2: This module provides 4 independent Form C (SPDT) relay outputs for alarms, shutdowns, or signaling applications.
Q3: What are the relay contact ratings for this module?
A3: Each relay channel supports up to 2 A at 30 VDC or 0.5 A at 125 VAC with resistive loads.
Q4: Can the module operate in extreme temperatures?
A4: Yes, it is rated for operation between -40°C and +85°C, and storage up to +100°C.
Q5: What type of inputs does this module accept?
A5: The module accepts discrete dry contact inputs and can interface with analog signals depending on system configuration.
Q6: Does the module include diagnostic features?
A6: Yes, it has built-in module fault detection, channel monitoring, and LED indicators for power and channel status.
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