Page 11
IronHorse GSDA-CM-8 User Manual – 1st Ed. Rev. A – 10/15/19
Analog Source Signal Connection
The drawing below of the female RJ45 “modular” connector on the GSDA-CM-8 describes the pins that
are used for analog input as well as the other pins on the connector.
RJ45 Jack
Front
8 7 6 5 4 3 2 1
RJ45 Pin
Signal Description
1
RS232 Rx (Receive data)
2
No Connect
3
TxD+, RxD+ (+transmit/receive data line)
4
TxD-, RxD- (-transmit/receive data line)
5
Frequency generator out (Do not use for
RS232 communications)
6
Circuit Common, Signal Ground
7
Analog Input (0 to 5 VDC)
8
RS232 Tx (Transmit data)
An eight conductor RJ45 male and an eight conductor modular cable are required to use the analog
input (such as ZL-RTB-RJ45 available at www.automationdirect.com). A six position RJ12 connector
may also be used as an alternative. An external resistor or an external potentiometer may be needed
depending on the type of signal you will be using. Wiring for the various signal input configurations is
shown below.
Wiring Diagrams for Each Source Type
Below are three diagrams showing the basic input wiring necessary for each type of analog input
source.
WARNING: t
he
optImum
sIGNAl
RANGe
thAt
cAN
be
sAfely
ApplIed
to
the
ANAloG
INput
Is
fRom
0.0vdc
to
+20vdc.
s
IGNAls
IN
excess
of
+20vdc
cAN
Result
IN
peRmANeNt
dAmAGe
to
the
GsdA-cm-8. f
oR
pRopeR
opeRAtIoN
,
the
useful
sIGNAl
RANGe
Is
zeRo
to
+5vdc.
0 to +5VDC Voltage Source Input Wiring
Connect "B" to Analog Input (Pin 7)
of RJ45 Modular Jack on GSDA-CM-8
Zero to +5VDC
Voltage Source
Connect "A" to Signal Common (Pin 6)
of RJ45 Modular Jack on GSDA-CM-8
B
A
Mode: 0-5Vdc:
Parameter
Value
Descrip
�
on
120
2
Slot 500
5040
1
Target Speed
5041
2
0-5Vdc Input
Pin 7
Pin 6
4 to 20mA Current Source Input Wiring
Connect "B" to Analog Input (Pin 7)
of RJ45 Modular Jack on GSDA-CM-8
+4 to +20mA
Current Source
Connect "A" to Signal Common (Pin 6)
of RJ45 Modular Jack on GSDA-CM-8
B
A
R*
* R = 250 ohms, 1/2W for +4 to +20mA Current Source
NOTE: R should be .1% tolerance
(customer supplied)
Mode: 4-20mA:
Parameter
Value
Descrip
�
on
120
2
Slot 500
5040
1
Target Speed
5041
3
4-20mA Input
Pin 7
Pin 6
Potentiometer Input Wiring
Connect "C" to Signal Common (Pin 6)
of RJ45 Modular Jack on GSDA-CM-8
B
NOTE: Potentiometer Must
be within the range
of 500 to 5K ohms
A
C
Connect "B" to Analog Input (Pin 7)
of RJ45 Modular Jack on GSDA-CM-8
Connect "A" to +5VDC Barrier
Strip Terminal on GSDA-CM-8
Rear View
of
Potentiometer
C B A
Mode: Poten
�
ometer:
Parameter
Value
Descrip
�
on
120
2
Slot 500
5040
1
Target Speed
5041
1
Poten
�
ometer Input
A = Pin P1-6 (GSD8 Drive)
B = Pin 7 (GSDA-CM-8, RJ45 Connector)
C = Pin 6 (GSDA-CM-8, RJ45 Connector)
NOTE: All three of these Analog Inputs will retain their setting if the AC power is cycled OFF/ON.
