BusWorks® 961/962EN User’s Manual Modbus TCP/IP Differential I/V Input
__________________________________________________________________
_______________________________________________________________________________________
Acromag, Inc. Tel:248-624-1541 Fax:248-624-9234 Email:
sales@acromag.com
http://www.acromag.com
6
-
I
NOTE 1
VOLTAGE
V
+
TB1
1515 IN1+
IN1+
1212
1616 IN1-
IN1-
1313 IN0+
IN0+
(962EN)
DC
CURRENT
(961EN)
-
+
TB1
1414
1616
IN0-
IN1-
IN1-
1111
1313 IN0+
IN0+
1515
1414
IN1+
IN1+
IN0-
INPUT
S
0, 1
1212
1111
DC
INPUT
S
0, 1
SHIELDED
CABLE
SHIELDED
CABLE
Ranges: 0-20mA, 4-20mA,
0-11.17mA, 0-1mA DC.
NOTE 1: THIS GROUND CONNECTION IS RECOMMENDED FOR BEST
RESULTS. IF SENSORS ARE INHERENTLY CONNECTED TO GROUND,
USE CAUTION AND AVOID MAKING ADDITIONAL GROUND CONNECTIONS
WHICH COULD GENERATE GROUND LOOPS AND MEASUREMENT ERROR.
Ranges: +10V, +5V,
+2.5V, +1.25V,
+625mV, +313mV,
+156mV, +78mV.
-
+
-
+
IN0-
NC
NOTE 1
IN0-
NC
NC
IN1-
IN0+
IN1+
TB1
XMTR
2-WIRE
DC
PWR
IN1-
IN0+
IN1+
NC
TB1
RED WIRE (+)
BLACK WIRE (-)
AC CURRENT
2-WIRE TRANSMITTER (961EN)
5020-350
SENSOR
AC CURRENT
SENSOR INPUT (961EN)
9
Connect 15-36V DC to the power terminals labeled DC+ & DC-.
Observe proper polarity. For supply connections, use No. 14 AWG
wires rated for at least 75
°
C.
CAUTION:
Do not exceed 36VDC peak.
33
31 DC+
32 DC-
PW
R
+
TB3
GND
TB3
INPUT POWER
IS ISOLATED
EARTH
GROUND
15 TO 36VDC
CAUTION: Risk of Electric Shock
– More than one disconnect switch may
be required to de-energize equipment before servicing.
IMPORTANT – External Fuse:
If unit is powered from a supply capable of
delivering more than 1A to the unit, it is recommended that this current be
limited via a high surge tolerant fuse rated for a maximum current of 1A or
less (for example, see Bel Fuse MJS1).
9
Connect analog input signals to the input terminals as shown below
according to your model.
CONNECTIONS
Power
Voltage Current
15VDC 113mA
18VDC 95mA
24VDC 74mA
36VDC 55mA
Analog Inputs
Input is DC current (961EN),
or DC voltage (962EN),
according to model number.
Inputs are not isolated
channel-to-channel, except for
small common mode voltage
differences up to ±12V peak
(962EN), or ±5V peak
(961EN).
Connections to an optional AC
current sensor or two-wire
transmitter (961EN Only)
