Status indicators
LED's indicate status of communications, running, errors,
power, and digital outputs
Environmental operating
range
0 to 130°F (-17.8 to 54.4°C), 10–90% relative humidity,
non-condensing
Physical Rugged GE C2950 Cycoloy plastic
Overall dimensions
Width:
Height:
5 1/16 in. (12.9 cm)
5 11/16 in. (14.4 cm)
Mounting dimensions 5 9/16" (14.1 cm) between mounting slot centerlines
Weight 0.6 lbs (0.27 kg)
BACnet support
Conforms to the Advanced Application Controller (B-AAC)
Standard Device Profile as defined in ANSI/ASHRAE
Standard 135-2004 (BACnet) Annex L
Listed by
UL-916 (PAZX), cUL-916 (PAZX7), FCC Part 15-Subpart B-
Class A, CE EN50082-1997
Inputs
The ZN551 has 5 inputs that accept the following signal types:
These
inputs...
Support this
signal type...
Description
All Thermistor
Precon type 2 (10 kOhm at 77°F). Input voltages will be
from 0.33 Vdc to 2.52 Vdc for thermistors.
All Dry contact
A 3.3 Vdc wetting voltage detects contact position,
resulting in a 0.3 mA maximum sense current when the
contacts are closed.
IN-1, IN-2 0–5 Vdc
The output impedance of a 0–5 Vdc source must not
exceed 100 Ohms. The input impedance of the ZN551
is approximately 30 kOhm.
IN-4, IN-5 LogiStat IN-4–See Thermistor.
IN-5–Setpoint adjust. Input voltages should be from
1.4–3.4 Vdc.
NOTE A LogiStat sensor connected to the ZN551 uses IN-4 and IN-5. An RS
room sensor connected to the Rnet port does not use these inputs.
Room sensors
You can wire an RS Standard, RS Plus or RS Pro to the ZN551's Rnet port.
Or you can wire a LogiStat or LogiStat Plus to the ZN551's LStat port. See the
RS Room Sensors Technical Instructions (http://info.automatedlogic.com) or
the LogiStat Sensors Technical Instructions (http://info.automatedlogic.com).
NOTE The ZN551 does not support the LogiStat Pro.
Digital outputs
The ZN551 has 5 digital outputs. You can connect each output to a
maximum of 24 Vac/Vdc. Each output is a dry contact rated at 1 A, 24 V
maximum and is normally open.
Analog outputs
The ZN551 has 1 analog output that supports voltage devices from 0-10 Vdc.
The controlled device must have a minimum of 2000 Ohms resistance
ZN551 Control Module • Rev. 3/17/2005 3 © 2005 Automated Logic Corporation
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