Liebert 232 User Manual

SITE MONITORING

SiteGate-232

USER’S MANUAL

SiteGate-232 Technical Instructions

Contents

Introduction.................................................................................................. 3

Specifications .............................................................................................. 3

Network Communications........................................................................... 4

System Architecture .................................................................................... 5

Mounting ...................................................................................................... 5

Power Wiring................................................................................................ 6

Addressing, Baud Rates, and Console Settings ....................................... 7

Communication Wiring ............................................................................... 8

CMnet Wiring ......................................................................................... 8

The "SETGCM" Command .......................................................................... 8

Transferring Memory ................................................................................... 9

Cables........................................................................................................... 9

Cable Diagrams for Console Port #1 ................................................. 10

Cable Diagrams for Console Port #2 ................................................. 10

Checkout & Troubleshooting.................................................................... 11

Troubleshooting Procedure ............................................................... 11

Common Problems ............................................................................. 11

Manually Formatting the Module ....................................................... 12

LEDs ..................................................................................................... 12

LED Identification................................................................................ 12

LED Power-up Sequence .................................................................... 13

Fuses.................................................................................................... 14

LGM Module Driver .................................................................................... 14

Parameter Page ................................................................................... 14

LGM Module Driver Parameters ......................................................... 16

Status Page.......................................................................................... 18

LGM Module Driver Status.................................................................. 19

Introduction

The SiteGate-232 is part of the Liebert SiteScan gateway family and provides communications between a workstation and a control module network (CMnet) consisting of fewer than 50 modules. The SiteGate-232 provides two EIA-232 Console Ports for connecting a workstation and/or a modem. The console ports are switch selectable for baud rates up to 38.4k bps.

Communication between the SiteGate-232 and the CMnet is provided through a EIA-485 port. The SiteGate-232 does not have a Direct Network (DN) connection.

NOTE: You must use FB Link v2.7 or later in order to transfer to any module containing Exec 6.0 or later.

Specifications

Power: 24 VAC ±10%, 50-60 Hz, 7.2 VA. Console Ports: (2) EIA-232 serial ports (D-sub 9-pin connector, and 5-pin pluggable screw terminal

block) switch selectable for 9600 or 38.4k bps.

CMnet Port: EIA-485, twisted pair, 9600/38.4k bps, optically isolated. (156k bps to be supported

by a future version of the module driver).

Status Indication: Visual (LED) status of EIA-232 communication, CMnet communication, running,

errors, and power.

Temperature Range: 0-130 °F (-17.8 to 54.4 °C). Humidity Range: 10%-95% relative humidity, non condensing. Memory: 1 MB FLASH memory for module driver storage and 1024 kB of battery backed RAM.

EIA-232 Console Port 1

Console Por t

n/c

+10v

n/c

Pow er

Off On

Switc h

dcd

Pow er

Indi c ato r

dtr

gnd

Pow er Supply

Use single Class 2

source only

Cl as s 2 50-60 Hz 24 VAC

0.4 Amp

Use copp er

conductor on ly

Gro un d

24 V AC

Power Switch

SiteGate-232

EIA-232 Console Port 2

Auxiliary Device Port

CMnet Baud Rate Jumper

Access Port

Tx Rx

Consol e 2

Opti on al S hi el d

Aux iliary Device Por t

Ba ud 156K Baud 9600/38.4 K

Run Error CMne t Rec ei v e Cmne t T rans m it Console 2 recieve Console 2 transmit Console 1 recieve Console 1 transmit

Acc es s port

6 1/4"

Format button

CMnet baud 9600 Console 1 baud 9600 Console 2 baud 9600

CMnet

co nn ec tion

7 1/8"

Manual Format Button

38.4K

Addressing Dip Switc h

Opti o na l Sh ie ld

Net Net +

CMnet Connect i on

1 5/8"

Rev. (08-JULY-98)

LEDs

Figure 1: SiteGate-232 Module Dimensions and Layout

Battery: Seven-year lithium battery provides a minimum of 10,000 hours of data retention during

power outages.

Fault Detection: Hardware watchdog timer. Software Requirements: One LGM module driver as FB #15. Workstation software must be

SiteScan for Windows v2.5b or later, Alert 1.1a or later, and FB Link v2.7 or later.

Protection: ESD protection on Console Port 1. Voltage, current, and ESD protection on Incoming

Power, CMnet, and Console Port 2.

Hardware Accessories: Keypad display. Listed By: PAZX (UL916), cUL C22.2 No. 205-M1983.

Network Communications

The CMnet is a peer-to-peer network which allows the various control modules to communicate with each other. An IBM-compatible computer can communicate on the CMnet through the SiteGate-232 when direct-connected (DC) or modem-connected (MC), or it can communicate on the CMnet through any other module with a Direct-Network (DN) connection. The SiteGate-232 does not have a DirectNetwork (DN) connection.

The CMnet communicates using the EIA-485 standard. A "token passing" scheme is used so that each module has the token in turn. When a module has the token, it broadcasts whatever information is appropriate from its FBs, while all other modules on the CMnet listen. Any module may receive information from any other module, but it may broadcast only when it has the token.

When a module is finished with the token, it passes it to the next module (or back to the gateway, if using grabless token passing) by broadcasting a token-pass message using the next module's address. The receiving module must acknowledge this message to complete the pass. The SiteGate-232 listens for an address which is equal to the total number of modules on the CMnet plus one (also referred to as the Maxnet value). When the last module on the CMnet attempts to pass the token by broadcasting the Maxnet value, the SiteGate-232 acknowledges the token and starts the cycle over. Signal integrity on the CMnet is affected by the wire gauge and the total amount of wire in the

EIA -232

Workstation

(Up to 38.4 kbps)

Dial up

telephone line

Modem

UCM 1 0-8

RCM 1 0U

CMn e t

EIA -485

38.4 kbps

SiteGate-232

RCMEX P

50 nodes

maximum

Workstation

EIA -232

(Up to 38.4 kbps

DCU

IGM

DC 1

OCM-8

Figure 2: System Architecture (Small System)

segment. A segment is defined as the network of modules between main nodes. Main nodes can be represented by a gateway module, or a repeater (part no. REPOPT). A repeater can be used to end one segment and begin another, all on the same CMnet.

It is recommended that only a dedicated, 22AWG to 18AWG twisted pair copper wire be used for CMnet (EIA-485) wiring. Wire sizes smaller than 22 gauge or wires that are not twisted may cause intermittent communication problems.

NOTE: For further explanation of communications wiring, see the Technical Handbook.

System Architecture

The Liebert Architecture is designed to support both large and small systems. Small systems (those using less than 50 control modules) require only a single SiteGate-232 which serves the entire Control Module Network, or CMnet (see Figure 2). The SiteGate-232 communicates with the workstation via a EIA-232 serial communication port. A second EIA-232 port can be used for communication with another operator workstation or a portable field computer via modem or direct EIA-232 connection.

The SiteGate-232 communicates with the CMnet through a EIA-485 port. This CMnet is a peer-to-peer local area network which uses a "token-passing" protocol to allow all control modules to communicate with one another with equal authority. Each control module is capable of stand-alone DDC (Direct Digital Control), thus increasing system reliability and performance.

Mounting

Mount the SiteGate-232 in an enclosure using the four holes provided on the module's cover plate (see Figure 3). Recommended screw size is 8. Make sure that nothing comes in contact with the back of the printed circuit board, and leave approximately 2 inches on each side for wiring. The SiteGate-232 is designed to be mounted inside the building envelope. All warranties are void if mounted outside.

Rev. (08-JULY-98)

Figure 3: Mounting the SiteGate-232

Power Wiring

CAUTION: The SiteGate-232 modules are Class 2 devices (less than 30 VAC). Take appropriate isolation measures when mounting a SiteGate-232 module in a control panel where Class 1 devices or wiring are present.

NOTE: Whenever possible, terminate and verify power and communication to all modules before terminating any inputs and outputs.

1. Terminate AC power at the wiring source (usually a circuit breaker or other AC source).

2. Apply power to the transformer.

3. Turn the SiteGate-232's power switch OFF (see Figure 1 for location) to prevent the module from being powered up until proper voltage is verified.

4. If you are using an internally grounded transformer, terminate the Earth Ground wire to the Gnd screw terminal as indicated in Figure 4.

CAUTION: Be sure to follow proper polarity on power connections. Note INCORRECT power wiring in Figure 5.

If the transformer is not internally grounded, terminate the two power wires as indicated in Figure 6.

5. Verify that 24 VAC is present at the power input terminals and turn the SiteGate-232's power switch on.

6. Once the power wiring procedure has been completed, the "Run" LED should turn on and begin blinking. If this does not occur, turn the power switch off and check for wiring errors.

Figure 4: SiteGate-232 moduleFigure 4: SiteGate-232 module

Figure 4: SiteGate-232 module

Figure 4: SiteGate-232 moduleFigure 4: SiteGate-232 module

GroundGround

Ground

GroundGround

Figure 5: Figure 5:

Figure 5:

Figure 5: Figure 5:

SiteGate-232 module powered bySiteGate-232 module powered by

SiteGate-232 module powered by

SiteGate-232 module powered bySiteGate-232 module powered by

transformer with Earth Groundtransformer with Earth Ground

transformer with Earth Ground

transformer with Earth Groundtransformer with Earth Ground

INCORRECTINCORRECT

INCORRECT

INCORRECTINCORRECT

wiring of the wiring of the

wiring of the

wiring of the wiring of the

Figure 6: SiteGate-232 moduleFigure 6: SiteGate-232 module

Figure 6: SiteGate-232 module

Figure 6: SiteGate-232 moduleFigure 6: SiteGate-232 module

GroundGround

Ground

GroundGround

Addressing, Baud Rates, and Console Settings

The SiteGate-232 module's address is factory-set as control module #1 and cannot be changed. NOTE: The CMnet Baud Rate jumper (see Figure 1 for location) is only used to configure the CMnet for

156k bps. If the CMnet Baud Rate jumper is set to 156k, the CMnet Baud DIP switch is ignored.

The CMnet communication speed and baud rates for the SiteGate-232's console ports are configured using an 8-position DIP switch. The following is a list of each switch position and its function.

DIP Switch Number Function

1 This switch selects the CMnet communication baud rate. When this switch is in the left

position, the SiteGate-232's CMnet baud rate is set at 9600 bps. When the switch is in the right position, the CMnet baud rate is set at 38.4k bps.

NOTE: All modules on the CMnet must use the same baud rate.

2 This switch selects Console 1's communication baud rate. When this switch is in the left

position, the Console 1 baud rate is set at 9600 bps. When the switch is in the right position, the Console 1 baud rate is set at 38.4k bps.

3 This switch selects Console 2's communication baud rate. When this switch is in the left

position, the Console 2 baud rate is set at 9600 bps. When the switch is in the right position, the Console 2 baud rate is set at 38.4k bps.

4-8 Not used.

Example:

As shown in Figure 7, switch 1 is in the 38.4k position, switch 2 is in the 9600 position, and switch 3 is in the 38.4k position. As a result, the SiteGate-232 is configured as follows:

• The CMnet baud rate is set at 38.4k bps.

• The Console 1 baud rate is set at 9600 bps.

• The Console 2 baud rate is set at 38.4k bps.

Rev. (08-JULY-98)

Figure 7: Setting the SiteGate-232's Dip Switch

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