Description
Yokogawa ACM12 Access Control Module
The ACM12 module, also cataloged as the ACM12 Access Control Module, operates as a dedicated hardware component for single-door access management within the EVO system. It executes user authentication, door status monitoring, and relay control for locking devices via card, PIN, or combined credentials.
Hardware Specifications
| Parameter |
Specification |
| Model Brand |
Yokogawa ACM12 |
| Origin |
JAPAN |
| Weight |
0.25 kg (approximate enclosure only) |
| Dimensions |
14 x 9.2 x 2.5 cm |
| Operating Temp |
0 to 50 degC |
| Power Consumption |
16 VAC, 20 VA; Aux 12 VDC, 600 mA; Battery 12 VDC Gel Cell protected with 5 A fuse |
| User Capacity |
999 |
| Door Unlock Schedules |
4 schedules, 8 periods total |
| User Schedules Capacity |
32 |
| User Security Levels |
15 |
| Door Unlock Relay |
Form C, 5 A / 28 VDC |
| PGM Output |
50 mA, predefined definitions |
| Device Connections |
Two 4-wire Paradox readers or one 7-wire 26-bit Wiegand reader, door contact, REX, tamper |
| Manual Unlock |
Negative trigger input |
| Control Panel Compatibility |
EVOHD V4.5+, EVO192 V4.5+ |
| Metal Box (optional) |
Minimum 20 x 25.5 x 7.6 cm |
Eddy-Current Probe Scaling and Signal Validation
The ACM12 integrates with system-level monitoring for accurate user authentication. The module’s design allows gap voltage validation down to -10 VDC targets for connected devices, ensuring precise signal interpretation in cross-talk environments. This maintains operational integrity when paired with dual-reader setups or high-density access points.
FrequentlyAskedQuestions
Q: VnA: Can the ACM12 operate in offline mode?
A: Yes. The ACM12 supports full offline functionality, storing the user database locally and synchronizing automatically once the panel connection is restored.
Q: VnA: What is the supported reader configuration?
A: The module supports two 4-wire Paradox readers (IN/OUT) or one 7-wire 26-bit Wiegand reader (IN only).
Q: VnA: How does the manual unlock function work?
A: The manual unlock is triggered via a negative voltage input, which momentarily engages the door relay independently of user credentials.
Field Installation Guidelines
-
Ensure all metal enclosures are properly grounded to prevent EMI interference.
-
Connect door contacts, REX devices, and tamper switches according to standard Paradox wiring diagrams.
-
Maintain separation of AC power lines and data wiring to reduce voltage transients and signal distortion.
-
Mount the optional metal box to a structurally stable surface, allowing at least 2 cm clearance for airflow and cable routing.
-
Verify fuse ratings on battery and auxiliary power connections before commissioning.
