Allen-Bradley 440R-C23139 Guardmaster MSR127TP Safety Relay
$123.00
$320.00
Description
Allen-Bradley 440R-C23139 Guardmaster MSR127TP Safety Relay
Configured for dual-channel safety circuit monitoring, the Allen-Bradley 440R-C23139 (MSR127TP Safety Relay) provides discrete safety control for emergency stops, safety gates, and light curtains.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 440R-C23139 |
| Base Model | MSR127TP |
| Brand | Allen-Bradley |
| Product Type | Safety Relay |
| Dimensions | 22.5 mm compact housing; other dimensions not specified |
| Operating Temp | -5 deg C to +55 deg C |
| Power Consumption | Less than 2.5 W |
| Supply Voltage | 24 V AC/DC |
| Safety Inputs | 1 dual-channel or 2 single-channel |
| Safety Outputs | 3 NO immediate safety contacts |
| Auxiliary Output | 1 NC solid-state auxiliary contact |
| Output Contact Rating | 6 A at 250 V AC / 24 V DC |
| Reset Type | Automatic/Manual or Monitored Manual, configurable |
| Terminal Type | Removable pluggable screw terminals |
| Housing Protection | IP40 |
| Terminal Protection | IP20 |
| Mounting | 35 mm DIN rail |
| Safety Rating | Category 4 per EN 954-1; SIL CL3 per IEC 62061; PL e per ISO 13849-1 |
Discrete Safety Control and I/O Architecture
The MSR127TP uses discrete safety inputs rather than a fieldbus communication interface for primary safety circuit evaluation. The input arrangement supports either one dual-channel circuit or two single-channel circuits, depending on the configured safety application.
The relay provides three normally open immediate safety contacts for switching the safety circuit. One normally closed solid-state auxiliary contact provides non-safety status signaling.
The TP configuration supports Transverse Fault Detection with pulse monitoring and configurable reset operation. Reset selection includes automatic/manual and monitored manual modes according to the installed circuit configuration.
No Profinet or EtherNet/IP interface is specified for the 440R-C23139. External wiring therefore carries the safety input, reset, output, and auxiliary signals directly through the removable screw terminals.
Frequently Asked Questions
Q: What supply voltage does the 440R-C23139 require?
A: The safety relay operates from a 24 V AC/DC supply, with power consumption below 2.5 W.
Q: How many safety circuits can the MSR127TP monitor?
A: The specified input arrangement supports one dual-channel safety circuit or two single-channel safety circuits.
Q: Can the relay be mounted on a standard DIN rail?
A: Yes. The supplied specification identifies 35 mm DIN rail mounting for the 440R-C23139.
Field Installation Guidelines
Install the relay on a 35 mm DIN rail with sufficient clearance for removable terminal access and conductor routing.
Verify the 24 V AC/DC supply before connecting safety inputs, reset circuits, or output contacts. Observe the specified terminal assignment during wiring.
Route safety-related conductors separately from high-current switching circuits and high-noise power conductors where practical. Avoid unnecessary parallel runs with motor or drive wiring.
Connect cable shields according to the cabinet grounding design and applicable machine safety requirements. Do not use signal shields as protective conductors.
Check dual-channel wiring for correct channel separation and fault-detection behavior before placing the machine into service.
For automatic reset configurations, verify that the external machine safety design prevents unintended restart conditions. For monitored manual reset, verify the reset circuit and its physical operating location before commissioning.
Confirm the enclosure and terminal protection requirements before installing the relay in environments containing conductive dust, moisture, or other contaminants.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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