IQH3A IQ 3U Modular Enclosure
www.snellgroup.com
Installation
Issue 2 Rev 2
Page 19
©
2014 Snell Limited
3.6 Rear Panel Connections
3.6.1 Ethernet
3.6.2 Remote
3.6.2.1
9-Way D-Type Connections
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This RJ45 connector socket allows the unit to
be connected to a LAN.
Two integral yellow LEDs indicate transmit /
receive activity (flashing) and the speed
(10 Mb = OFF, 100 Mb = ON)
Activity
Speed
This connector is not intended for direct connection to a telecommunications network.
The 9-way, D-type connector on the rear
panel allows the unit to be connected to the
RollCall 485 network communications
system.
This connector may also be used as a
RS-422 or as a RS-232 RollCall
communication port.
5
9
1
6
Note:
RS-485 interconnections should be pin-to-pin and only be used for Snell RollNet
applications.
Important:
The supplied 9-way serial extension cable is only used for the initial setup of the Gateway
controls by qualified installation personnel. It must not be connected during the operational
use of the unit.
Pin No.
Function RS-485
Function RS-422
Function RS-232
1
Frame Ground
Frame Ground
No Connection
2
Data A (+)
Transmit A (TX-)
Transmit Data (Input)
3
V+ (see note)
Receive B (RX+)
Receive Data (Output)
4
Data Common
Receive Common
No Connection
5
V+ (see note)
No Connection
Signal Ground
6
Data Common
Transmit Common
No Connection
7
Data B (-)
Transmit B (TX+)
No Connection
8
V+ (see note)
Receive B (RX-)
No Connection
9
Frame Ground
Frame Ground
No Connection
