SIEMENS MPS-12 Power Supply Module Instruction Manual
- June 9, 2024
- SIEMENS
Table of Contents
SIEMENS MPS-12 Power Supply Module
OPERATION
The Model MPS-12 from Siemens Industry, Inc. is a high current power supply that provides the MXL System with primary 24 VDC power. It is rated at 12 amps and is unfiltered and unregulated. The MPS-12 supplies the MXL Control Panel or PSR-1 and its expansion modules with the power required for normal operation. The module incorporates a 5 amp resettable circuit breaker on the primary input, a 15 amp fuse on the 24V output, and a built-in AC line filter for surge and noise suppression. The MPS-12 mounts in an MXL enclosure backbox.
INSTALLATION
Always remove power before installation.
The installation kit for the MPS-12 includes the following:
- Four #10 nuts
- Two #10 lock washers
- Two #10 flat washers
- Two ¼” nuts
- One 14 gauge green ground strap
The MPS-12 is designed to operate from a 120 VAC, 60 Hz power source. Use a separate or dedicated circuit breaker. Wire in accordance with local codes and Article 760 of the NEC, NFPA 70, latest edition.
Run the earth ground from a suitable source to the MPS-12. Check local requirements. A conduit is not an acceptable conductor.
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Make sure that the dedicated circuit breaker for the MPS-12 is turned off at the mains.
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Place the mounting bracket for the MPS-12 over the two studs provided in the enclosure. (Refer to Figure 1.)
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Secure the MPS-12 to the enclosure by slipping the flat washers, then the lock washers, and finally the nuts over the two studs. Tighten them securely.
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Connect the AC mains to the MPS-12:
Terminal- Black (hot) 1
- White (neutral) 2
- Green (earth ground) 3
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Install the 14 gauge green ground strap spade lug side to Terminal 3 (green, earth ground) of the MPS-12. Secure the ring lug side of the ground strap to the nearest available stud in the enclosure. The stud size may vary depending on the actual system modules and enclosure used. Because the stud may be either a #10 thread or ¼” thread, nuts for both have been provided. The ground strap provided is long enough for all applications and the ring lug is good for both #10 and ¼” studs. If possible, install the ring lug under one of the lock-washers and nuts which secure the MPS-12 itself.
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When used with a PSR-1:
Connect the 8-wire cable coming from the MPS-12 to the PSR-1 at P10.-
When used with an MMB-2/-3 or SMB-2:
Connect the 8-wire cable coming from the MPS-12 to the MMB-2/-3 or SMB-2 at P14. -
When used with an MMB-1 or SMB-1:
Connect the CIA-12 Cable Adapter, P/N 500-692825, to the 8-wire cable coming from the MPS-12, and then to the MMB-1 or SMB-1 at P1.
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Contact Information
Siemens Industry, Inc. Building Technologies Division Florham Park, NJ.
P/N 315-049552-6.
Siemens Canada Limited
Building Technologies Division 2 Kenview Boulevard Brampton, Ontario L6T 5E4
Canada.