Document No. 588-097
Installation Instructions
Rev. 1, July, 2002
Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and
models as design improvements are introduced. Other product or company names mentioned herein may be the trademarks of their
respective owners. © 2002 Siemens Building Technologies, Inc.
Siemens Building Technologies, Inc.
1000 Deerfield Parkway
Buffalo Grove, IL 60089-4513
U.S.A.
Your feedback is important to us. If you have
comments about this document, please send
them to [email protected]
Document No. 588-097
Printed in the U.S.A.
Page 2 of 2
RS-485 TRUNK CABLE
(MAX 4000' / 1219.2 m;
STANDARD 24 AWG
LOW CAPACITANCE)
TAPE BACK
SHIELD
GROUND WIRE TO
EARTH (PN 538-583)
GW1011R1
POWER PACK
SMART TI-3 INTERFACE
(TTL/RS-485 INTERFACE)
SMART I, SMKI, OR
SMART II CONTROLLER
TTL-485
TTL-485
RS-485 INTERFACE
TERMINAL BLOCK
22
21
TTL-485
S - +
S - +
S -
-
+
+
-
+
-
+
1
2
SMVU-V
TERMINAL BLOCK
SMART I, SMKI, OR
SMART II CONTROLLER
TERMINAL BLOCK
22
21
SMVU-TI
+
-
+
-
LOW
HIGH
LOW
HIGH
LOW
HIGH
Figure 1. TTL/RS-485 Interface Wiring Diagram.
