AW Gear Meters RT-Ex15-Ex - Manual (Page 5)

AW-Lake Company 8809 Industrial Drive, Franksville, WI 53126  web: www.awgearmeters.com
 Tel: 262-884-9800  Fax: 262-884-9810  Email: [email protected]
RT-Ex15-Ex manual rev 6.13.11.docx Revision 3.3.10
5
Wiring Connections
Wiring connections are to terminal strips inside the rear cover. A ¾” NPT wire exit for conduit
connection is provided. Connection to conduit is required to maintain the enclosures explosion-
proof rating and must be made in accordance with all local and national electrical codes. TO
PREVENT IGNITION OF HAZARDOUS ATMOSPHERES, DISCONNECT CIRCUITS
BEFORE REMOVING COVER. KEEP COVER TIGHTLY CLOSED WHILE
CIRCUITS ARE ALIVE.
DC Power Connection
The RT-Ex15-Ex requires a Class 2, 24 VDC, 200mA min supply for operation. A power-on
LED is provided on the connection board and a 250mA mini-fuse protects the circuitry in case of
a supply fault. (See drawing below)
Reset Input
Opto-isolated input to reset the TOTAL A (Job Total). See TOTAL A RESET on page 11 for
information regarding reset of the job totalizer.
Limits/Pulse Outputs
Two opto-isolated NPN open-collector outputs can sink or source depending on connection.
Attention must be paid to polarity of connections, collector (+), emitter (-). See diagram below.
Output ratings are listed on page 2. Either output can be assigned to a rate limit, total limit for
batching or as a totalizer pulsed output. See LIMITS Display Mode and LIMITS Programming
on page 15 for information regarding the display and programming of the limit and pulse output.
RESET +
RESET IN PUT
(Iso la te d )
RESET -
+ M o m e nta ry
5 - 2 4 VD C
2 .3 5 Ko hm
1 0 0 Ohm
(Em itte r)
(C o lle c to r)
5 0 m A M a x.
LIM IT OUTPUTS
(Iso la te d )
LIM IT (+ )
LIM IT (- )
5 - 2 4VD C