The ZN551 control module is used for zone control.
Module driver DRV_ZN
Maximum number of control
programs
1
Maximum number of
BACnet objects*
200
* Depends on available memory
Power
24 Vac ±10%, 50–60 Hz, 15 VA
26 Vdc (25 V min, 30 V max)
CMnet port
For communication with the control module network using
ARC156 or MS/TP (9600 bps–76.8 kbps)
Rnet port
For RS room sensors. The Rnet port supports up to four
RS sensors and one RS Pro or RS Plus sensor for
averaging or high/low select control.
NOTE The ZN551 does not support BACview.
LStat port
For LogiStat and LogiStat Plus room sensors. The LogiStat
port uses two universal inputs.
NOTE The ZN551 does not support the LogiStat Pro. Use
an RS Pro on the Rnet port instead.
Local access port For system start-up and troubleshooting
Inputs
5 inputs configurable for thermistor or dry contact. Inputs
1 and 2 are also configurable for 0–5 Vdc. Inputs 4 and 5
are used when a LogiStat sensor is connected, but are
available if an RS room sensor is connected.
Input resolution 10 bit A/D
Digital outputs
5 digital outputs, relay contacts rated at 1 A max. @ 24
Vac/Vdc. Configured normally open.
Analog output 1 analog output, 0–10 Vdc (5 mA max)
Output resolution 8 bit D/A
Memory
512 kB non-volatile battery-backed RAM, 1 MB Flash
memory, 16-bit memory bus
Battery
10-year Lithium CR2032 battery provides a minimum of
10,000 hours of data retention during power outages
Protection
Incoming power and network connections are protected
by non-replaceable internal solid-state polyswitches that
reset themselves when the condition that causes a fault
returns to normal. The power, network, analog inputs,
analog outputs, and relay output connections are also
protected against voltage transient and surge events.
Specifications
Module driver and
control program
What is the ZN551 control module?
ZN551 Control Module • Rev. 3/17/2005 2 © 2005 Automated Logic Corporation
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