Series 655T/656T Transmitter User's Manual mV/TC Input
___________________________________________________________________________________________
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DC V OLTA GE
22
21
24
23
S CRE W TE RMINA L NUMB E R
TC
CONDITIONING
INP UT S IGNA L
IN-
IN+
INP UT
TE MP S E NS OR MOUNTE D
IN FIRS T TWO P OS ITIONS
OF TE RMINA L B LOCK .
TE MP
S E NS OR
+3V
S UP P LY
FA CTORY
CONFIG
P ORT
INTE GRA TE D E E P ROM
A ND S UP P ORT LOGIC
MICROCONTROLLE R
16 B IT A /D
MULTIP LE X E R
A ND
CONV E RTE R
A ND FLA S H ME MORY
TOGGLE S WITCHE S
DIP S WITCHE S
CURRE NT
S WITCH
+5V
SERIES 655T/656T SIMPLIFIED SCHEMATIC
(ONLY CHANNEL 1 SHOWN)
MODEL 655T-0600 UNITS CONTAIN A
SINGLE CHANNEL AS SHOWN
MODEL 656T-0600 AND 656T-E600 UNITS
CONTAIN 2 CHANNELS, EACH AS SHOWN
DUAL CHANNELS OF 656T UNITS ARE FULLY
INDEPENDENT AND ISOLATED FROM INPUT
TO OUTPUT AND CHANNEL TO CHANNEL
FILTE R
CURRE NT
CONTROL
OS CILLA TOR
CURRE NT
S TE E RING
CIRCUIT
V OLTA GE
S UP P LY
12-50V DC
TRA NS IE NT
V OLTA GE
S UP P RE S S ION
S CRE W TE RMINA L NUMB E R
OUT+
IS OLA TE D OUTP UT/P OWE R
25
4-20mA
R-LOA D
+
4-20mA
OUT-
IS OLA TE D OUTP UT/P OWE R
26
4501-777A
DN
TB3
IN
-
-
+
+
DN
21
36
O
U
T
-
IN
+
23
34
IN
-
24
33
IN
+
O
U
T
-
26
31
NOTE 1
load
R
OUT-
IN+
OUT+
Z
UP
FS
FS
CHANNEL 1
655T-0600
656T-0600
NOTE 1
TC
R
load
OUT+
IN-
IN+
IN-
OUT-
UP
Z
CJC
O
U
T
+
22
25
656T-E600
656T-0600
35
32
656T-E600
CHANNEL 2
O
U
T
+
+
CJC
SENSOR
CJC
SENSOR
GROUND LOOPS AND MEASUREMENT ERROR.
NOTE 1
SHIELDED CABLE
4-20mA
NOTE 1
WARNING:
TB2 or TB3
Acromag
CHAN 1
DC SUPPLY
(12-36V DC)
SOURCE
VOLTAGE
DC SUPPLY
4-20mA
SHIELDED CABLE
(12-36V DC)
INPUT
CHAN 2
TB2 or TB3
MODEL 656T-0600 SHOWN
I/O Connections
CH1 DIP SWITCHES
CJC
CH2 DIP SWITCHES
NOTE: TERMINALS 21 & 22 AND 31 & 32
ARE NOT REMOVABLE AND RESERVED
FOR THE CJC TEMPERATURE SENSOR.
DO NOT CONNECT TO THESE TERMINALS.
APPLICATIONS WITH VOLTAGES GREATER THAN OR EQUAL TO 75VDC/50VAC.
IF SENSORS ARE INHERENTLY CONNECTED TO GROUND, USE CAUTION AND
SAFETY GUIDELINES MAY REQUIRE THAT THIS DEVICE BE HOUSED IN AN
DRAWING. FAILURE TO ADHERE TO SOUND WIRING AND GROUNDING
THE USE OF SHIELDED CABLE IS RECOMMENDED AS SHOWN. ADDITIONALLY,
(SEE I/O CONNECTIONS AT LEFT)
CHANNEL 1
ZERO TOGGLE
AVOID MAKING ADDITIONAL GROUND CONNECTIONS WHICH COULD GENERATE
NOTE 1: THIS GROUND CONNECTION IS RECOMMENDED FOR BEST RESULTS.
APPROVED METAL ENCLOSURE OR SUB-SYSTEM, PARTICULARLY FOR
PRACTICES MAY COMPROMISE SAFETY AND PERFORMANCE.
THE APPLICATION OF EARTH GROUND MUST BE IN PLACE AS SHOWN IN THIS
4501-778B
ELECTRICAL CONNECTIONS
MODELS 656T-0600, 656T-E600, AND 655T-0600
FOR COMPLIANCE TO APPLICABLE SAFETY AND PERFORMANCE STANDARDS,
Refer To User's Manual
For Transmitter Zero And
Full-Scale Configuration
Instructions
FULL-SCALE TOGGLE
ZERO TOGGLE
FULL-SCALE TOGGLE
CHANNEL 2 (656T ONLY)
TB3 - REMOVABLE
(PLUG-IN TYPE)
TERMINAL BLOCK
TB2 - REMOVABLE
(PLUG-IN TYPE)
TERMINAL BLOCK
12-36V DC
12-36V DC