Table of Contents
Advertisement
D.20 LINK
D.20 Link
Connection scenarios
30
•
On D.20 cables (GE part number 977-0089), the shielded cable end can be located
opposite to the cable end labeled with the GE part number.
•
D-type connector covers must provide EMC shielding (e.g. metallized plastic or die cast
metal covers).
•
Maximum D.20 cable length 1000 ft (300 m)
Communications between the D.20 RIO and the D20 peripheral I/O modules are carried
over a high-speed, high-level data link control (HDLC) protocol called the D.20 Link. The
D.20 Link has the following features:
•
RS-485 serial link, half duplex, 250 kbps
•
D.20 frame using HDLC protocol format with Manchester encoding
•
Supports up to 30 D20 I/O peripheral modules in a standard configuration
•
Repeater/extension modules (GE part number 520-0118, 520-0117, and 520-0148)
can be used to extend the distance between peripheral modules
D.20 RIO supports all peripherals equipped with PCommon 3.X series. Replacement of the
PCommon chips is required for interfacing with existing peripherals equipped with 2.X
series of PCommon.
Table 6: D.20 link port pin out
D.20 Port A
Name
No connection
Link channel 1+
Link channel 1
−
3
+DC 1 (JP1 1-2)
3
DC 1 Return (JP1 3-4)
Link channel 2+
Link channel 2
−
3
+DC 2 (JP1 5-6)
DC 2 Return (JP1 7-8)
Note 1: Shield is connected to D.20 RIO chassis ground
Note 2: Refer to "SW3: D.20 channel 2 to D.20 link port B" on page 22.
Note 3: Refer to "JP1: Power supply to D.20 connectors" on page 23.
Note 4: Refer to "SW1: D.20 channel 1 to D.20 link port B" on page 22.
There are four ways to connect the D.20 RIO to peripheral devices:
•
"Single D.20 RIO terminated" on page 31
•
"Single D.20 RIO looped" on page 31
•
"Redundant D.20 RIO looped" on page 32
•
"Redundant D.20 RIO redundant link" on page 32
Refer to the section: "Configuring Single and Redundant D.20 RIOs" on page 54 for
information on configuring D.20 RIOs for the single and redundant connection scenarios.
CHAPTER 3: CONNECTING TO DEVICES AND NETWORKS
D.20 Port B
Pin
Name
1
1
Shield
2
Link channel 2+ (SW3 ON)
3
Link channel 2
4
+DC 1 (JP1 1-2)
5
DC 1 Return (JP1 3-4)
6
Link channel 1+ (SW1 ON)
7
Link channel 1
8
+DC 2 (JP1 5-6)
9
DC 2 Return (JP1 7-8)
GE Information
Pin
1
2
2
2
(SW3 ON)
3
−
3
4
3
5
4
6
4
(SW1 ON)
7
−
3
8
9
D.20 RIO - HARDWARE USER'S MANUAL
Advertisement
Table of Contents
