Installation and Operation Manual for
4-20ma Wireless Receiver Model A750
2
2
Analynk Wireless, LLC
790 Cross Pointe Road
Columbus, OH 43230
Phone: (614) 755-5091 Fax: (614) 755-5093 Web:
www.analynk.com
1.0 Features
•
The Model A750 offers simplicity and reliability
in a point to point RF system.
•
Designed for easy transmission of 4-20ma or
other DC signals.
•
Two form C alarm relay outputs.
•
RF Link, Alarm and LED indicators.
•
Two radio power levels available: 1W or 50mW
(A753-LP).
•
11 to 32 Vdc power (nominal 24 Vdc).
•
Repeaters can be added to extend range with
no programming.
•
Simple dip switch selectable RF channel and
RF Power.
•
No software required.
•
RSSI (received signal strength indicator).
•
Convenient 35mm DIN rail mount installation.
•
Designed to interface with A750 receiver.
2.0 Description
The A750 wireless RF instrument is the receiver for the A753 series of process RF transmitters. The
receiver has three outputs: one 4-20mA proportional to the process variable and two form C relays
(optional open collector). The relays A1 and A2 correspond to the process transmitter’s switch state
of A1 and A2, respectively if transmitter is an A753-ZG.
If transmitter is an A753-BT (Battery Powered), Relay A1 / LED A1 are used to indicate transmitter’s
battery condition (e.g. Low Battery). A third form C relay is utilized for RF detection; if the RF signal
becomes unreliable the RF Link alarm will activate.
In RSSI (received signal strength indicator) mode the RF signal strength can be monitored, this is
helpful to insure reliable RF reception/transmission and antenna alignment. LED indicators indicate
when packets of data are being transmitted and received. Power is provided by the industry standard
+24 Vdc (11 to 32 Vdc). The Model 750 can be used with a repeater (Model A759).
Transmitter
A753
Receiver
A750
(sold sepa-
rately)
