The Metasys SNC series network control engine is a hybrid offering
that provides both supervisory and equipment control in a unified offering. They
provide network management and system-wide control coordination over one or more
networks of equipment controllers, including the following Metasys equipment
controllers:
- CG series General Purpose Application Equipment Controllers
- CV series VAV Box Controllers
- FAC and FEC series Field Equipment Controllers
- VMA series VAV Box Controllers
- TEC series Terminal Equipment Controllers
- LN series Equipment Controllers
- Third-party equipment controllers
In addition to providing supervisory control capabilities, the SNC series network control engines also feature onboard input and output interfaces (I/O) and programmable logic to provide direct control over HVAC and other building system equipment.
Figure 1. SNC series network control engines
The following table outlines the SNC models in more detail. The letter G in a model's product code indicates that the model is the Buy American version.
Features | SNC2515x-0 SNC2515x-0H SNC25152-0G 1 SNC25152-0HG1 |
SNC2515x-04 SNC2515x-04H |
SNC1612x-0 SNC1612x-0H |
SNC1612x-04 SNC1612x-04H |
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Succeeds | NCE25 Series | NCE25 Series | NCE25 Series | NCE25 Series |
Onboard inputs and outputs |
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Communication interfaces |
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Maximum allowed devices across all integrations. For example, MS/TP+IP. Includes VND integrations and devices brought in through routers. | 96 | 4 | 60 | 4 |
BACnet/IP maximum trunks 3 4 | 2 | 2 | 2 | 2 |
BACnet/IP maximum devices per trunk | 50 | 4 | 50 | 4 |
BACnet/SC maximum trunks 4 | 1 | 1 | 1 | 1 |
BACnet/SC maximum devices per trunk | 50 | 4 | 50 | 4 |
BACnet MS/TP maximum trunks | 1 | 1 | 1 | 1 |
BACnet MS/TP maximum devices per trunk (Johnson Controls devices only) | 50 | 4 | 50 | 4 |
BACnet MS/TP maximum devices per trunk (with third party) | 50 | 4 | 50 | 4 |
N2 maximum trunks | 1 | 1 | 1 | 1 |
Mapped N2 devices per trunk | 50 | 4 | 50 | 4 |
LON maximum devices per trunk | 64 | 4 | 60 | 4 |
LON maximum trunks | 1 | 1 | 1 | 1 |
Remote Field Bus maximum trunks 5 | 3 | 3 | 3 | 3 |
Remote Field Bus maximum Johnson Controls Devices per bus | 32 | 4 | 32 | 4 |
Remote Field Bus maximum devices per bus (with third party devices) | 16 | 4 | 16 | 4 |
Maximum objects in device 6 | 2500 | 2500 | 2500 | 2500 |
Supported type of parent server |
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Supported integration drivers |
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Operating System | Wind River® Linux LTS 19 (LTS=long-term support) | |||
Microprocessor | NXP i.MX6 DualLite processor | |||
Memory | 2 GB of DDR3 RAM and 16 GB of eMMC Flash | |||
User Interface | Metasys UI, starting at Release 13.0 |
Note: Servers must be
equal to or at a higher Metasys Release than their child engines, including the
SNCs.
1 The letter G in a model's product code
indicates that the model is the Buy American version.
2 Only the
supported USB integration adapters function with the SNC.
Other integration adapters that are not supported cannot
function with the SNC.
3 Two Ethernet device connections include one
integral Ethernet port and one external Ethernet port with the
addition of ACC-USBETH-0 adapter. The second BACnet/ IP trunk is
supported only at Release 13.0 and later.
4 Direct Ethernet connection only. USB to
Ethernet adapter does not support BACnet/SC at this time.
5 The SNC requires Release 11.0
or higher to support the Remote Field Bus integration.
6 Suggested object limit for performance
considerations.