3.3.2.2 Rs485 Com / Relay Connector Pin-Out For Igm402 - Instrutech The Hornet IGM402 User Manual

Instruction Manual

3.3.2.2 RS485 COM / Relay Connector pin-out for IGM402

CAUTION! Do not connect power to both the Analog and the RS485 connectors. Apply power only to one
or the other. Applying power to both connectors may cause damage to the gauge and other connected devices.
When using the RS485 serial communications mode of operation, use the 9-pin D-sub (DE-9S) female RS485
COM connector as described below. The same connector is also used for ion gauge setpoint relay connections.
PIN NUMBER
1
2
3
4
5
6
7
8
9
Setpoint Relay -N.O. 1
Power Input 2
No Connection 3
Power Ground 4
Setpoint Relay -N.C. 5
RS485 COM / IG Setpoint Relay 9-Pin D-sub female (DE-9S) connector
NOTICE
Do not connect power to both connectors. Furthermore, if you are using InstruTech's PS501-A
power supply and using the RS485 function do not connect power to pins 2 and 4 of the RS485 COM
connector. The power will be received from the PS501A power supply via the ANALOG connector. Use the
RS485 COM connector pins for communications and setpoint relay only. If you intend to operate the IGM402
via RS485 communications only, device power may be connected to the IGM402 using pins 2 and 4 of the
RS485 COM connector. See CAUTION at
the +24 Vdc power and ground (power return) connections for the Analog and RS-485 COM DE-9 connectors.
InstruTech
RS485 COM / Relay 9-Pin D-sub female (DE-9S) connector
PIN DESCRIPTION
Setpoint relay - Normally Open; referred to as RLY
Power input (20-28 Vdc at 30 W, minimum). Do not connect power to both
the Analog and the RS485 connectors. Apply power only to one or the other.
No connection
Power ground (Also when using RS485 serial communications, connect this
pin to ground pin of your RS485 converter)
Setpoint relay - Normally Closed contact (RLY
RS485 DATA A (-) Input/output
Setpoint Relay - Common contact (RLY
Not used (do not connect)
RS485 DATA B (+) Input/output
6 RS-485 Input
1
6
DATA A (-)
7 Setpoint Relay
COM
9
5
8 No Connection
9 RS485 Input
DATA B (+)
Section 5.1
I
on front panel display)
I
on front panel display)
Pin-out assignments are not the same, especially for
IGM402 Hornet
I
on front panel display
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